On a lighter note...

Singing vegetables? Well, surely with current advances in GM crops, it can only be a matter of time! :) Via (broadsheet.ie)

The Vegetable Song (tweet @totallyeustus) from Si Bennett on Vimeo.

What region of the earth is not full of our calamities?

You know Spring has arrived when the daffodils, which pushed through the soil early this year, are in full bloom around the country. In fact, today is Daffodil Day in Ireland - a fundraising event organised by the Irish Cancer Society. To celebrate, we remember an Irish plantsman who put Cork on the map in terms of daffodil growing - William Baylor Hartland.

WB Hartland came from a long line of successful horticulturists. His grandfather, Richard Hartland (1745-1821) worked at the Royal Botanic Gardens at Kew before moving to Ireland to become a gardener to the Earl of Kingston at Mitchelstown. Around 1787,  Richard established a nursery at Bellvue Cottage, Mallow and had three sons. Arthur established a nursery near Turner's Cross in Cork City - where it seems he planted a fine monkey puzzle tree; Richard jnr. opened a nursery at Glasheen which continued in existence up until 1923 as the Lough Nursery. By 1867 the Lough Nursery took up 40 acres and included 18,000 feet of glasshouses.

The third son, William Baylor (the father of our WB Hartland) stayed on at the family nursery at Bellvue.

Our William Baylor Hartland (1836-1912) was only seven years old in 1843 when his father died and left him the business. With the help of his uncles, the business was run successfully and he established his own nursery at Temple Hill, just outside Cork in 1878.  In 1889 he moved the short distance to Ard Cairn in Ballintemple.

Hartland became internationally famous for growing daffodil bulbs and developing new cultivars such as Ard Righ. He published his Little Book of Daffodils in 1896 and by the turn of the 20th century he was exporting bulbs all over the world.

The back cover of his catalogue from around that time (pictured) clearly shows the drive and marketing ability of the man. "The True Home of Daffodils" the advertisement proclaims about Cork. "Hartlands seeds, Daffodils, and bulbs of all sorts, to all parts of the world".

Hartlands Catalogue c. 1900 (Image: The Library, National Botanic Gardens, Glasnevin, Dublin 9)

The map of the world, with Cork at its centre is framed by a quote from Virgil - quae regio in terris nostri non plena laboris or What region of the earth is not full of our calamities?

WB Hartland was clearly a wonderful salesman and his name lives on amongst daffodil breeders. He was also interested in new varieties of apple and he developed the Ard Cairn Russet variety. He died in 1912 and his nursery closed in 1917.

Cork Lough and the Lough Nurseries c. 1840. Present day Hartlands Avenue in red

The family name still lives on in Cork. In 1926, Oliver Hartland (who was, by then, running the Lough Nursery) built a road from Glasheen to the Lough. Hartland's Avenue remains as a reminder of the nursery and this family's industry.

Today is Daffodil Day and you can support the work of the Irish Cancer Society by buying a daffodil from sellers around the country. Look out for them and support this worthy cause.


Source: Much of the biographical information for this post comes from
Forrest, M (2010). Nurseries and nurserymen in Ireland from the early eighteenth to the early twenty-first century. Studies in the History of Gardens & Designed Landscapes: An International Quarterly 30(4): 1460-1176.

Getting creative with plants

Green roofs, living roofs or eco-roofs are not new but they are becoming more popular as their role in clearing up pollutants in the city air and providing much needed recreation areas become clear.

This spectacular creation - the world's first 'vertical forest'- is the brainchild of architect Stefano Boeri and is in the form of a pair of skyscrapers (now under construction), part of a €65 million luxury apartment development in Milan.

If planted on the ground, the plants would cover about 10,000 square metres!

Broadsheet mentioned the development today and I was intrigued enough to find out more. According to the architect's website, Bosco Verticale is a project for "metropolitan reforestation" and the towers will house up to 900 trees along with a range of shrubs and flowering plants.

"The Bosco Verticale aids in the creation of a microclimate and in filtering the dust particles contained in the urban environment. The diversity of the plants and their characteristics produce humidity, absorb CO2 and dust particles, producing oxygen and protect from radiation and acoustic pollution, improving the quality of living spaces and saving energy. Plant irrigation will be produced to great extent through the filtering and reuse of the grey waters produced by the building."

The vertical forest development brings into focus the growing (pun intended) calls to develop something similar at the abandoned Anglo Irish Bank headquearters in the Dublin Docklands. Those behind the calls see it as an innovative public park and urban space as well as a project to mark the centenary of the Irish Republic. It's certainly a noble aspiration and an expensive one; whether anything comes of it, we'll have to wait and see. The youtube presentation on the project has some more info.  

Proposed use for the former Anglo HQ © Mahoney Architecture 2011

That's certainly a creative use of plants- and here's another. This one was brought to my attention by one of my students and it's called moss graffiti.

It's a form of guerrilla gardening and what has been labelled "eco-graffiti" or "green graffiti".

Image: Anna Garforth

The concept involves painting a moss/buttermilk solution onto a blank wall, keeping it moist and watching the results grow. Although the results look really stunning and the "eco" label is attractive to people, it's probably best to get the wall owners permission before you try this!

The infographic below explains the process and comes from the book More Show Me How.

Are there buildings and locations you know that could do with some guerrilla gardening? Let us know by leaving a comment below.

National Tree Week 2012

This Sunday sees the start of National Tree Week in Ireland - a week-long series of events celebrating the impact of trees on our lives and on our environment.

>> Here at Communicate Science, we'll have a series of tree-themed posts to mark the occasion. Stay tuned! <<

National Tree Week runs from 4th-10th March and the theme for 2012 is 'Trees- Our Past, Our Present, Our Future'.

National Tree Week will kick off this Sunday with a series of events in Ardee, Co. Louth at which President Michael D. Higgins  will participate in a tree planting ceremony at 12 noon.

There are loads of events throughout the country - check out the website for full details.

Highlights include:

Clare - A guided tree walk in the Burren where there is famously "not enough wood to hang a man".

Cork - A guided walk at the Gearagh Nature Reserve near Macroom - the finest surviving example of ancient, post-glacial wooded floodplain on the River Lee.

Cork - A guided tour of the spectacular Fota Arboretum by Head Gardener David O'Regan.

Dublin - 'In Celebration of Trees' - An exhibition of Bonsai at the National Botanic Gardens.

Dublin - The inaugural National Tree Week lecture takes place at the National Botanic Gardens. "The Once and Future Forest" will be delivered by Dr. John Feehan.

Wexford - A forest walk at JFK Arboretum featuring a description of forest species, forest management, timber uses, wildlife and a demonstration of how to plant and fell trees.

Full details of times, dates, cost (where applicable), etc. can be found on the NTW website.

The Music of Flowers

Here's a nice preview of this week's episode of How to Grow a Planet. Watch and see how a species of plant and a species of bee have evolved a partnership based on the sound of a wing beat. The series continues this Tuesday, 9pm, BBC2.

Darwin Day Special: Darwin's 'Lost' Fossils

During the Summer of 2011, Howard Falcon-Lang was rummaging around in the windowless vaults of the British Geological Survey when he opened a drawer labelled simply "unregistered fossil plants".

What he found inside was a 'treasure trove' of fossils including some collected by Charles Darwin - who's birth we celebrate this weekend as Darwin Day!

“While searching through an old cabinet, I spotted some drawers marked ‘unregistered fossil plants’. I can’t resist a mystery, so I pulled one open. What I found inside made my jaw drop!” said Falcon-Lang.

“Inside the drawer were hundreds of beautiful glass slides made by polishing fossil plants into thin translucent sheets. This process allows them to be studied under the microscope. Almost the first slide I picked up was labeled ‘C. Darwin Esq.’ This turned out to be a piece of fossil wood collected by Darwin during his famous Voyage of the Beagle in 1834!”

The collection was put together by Darwin's good friend Joseph Hooker while he was employed by the Survey for a short time in 1846.

"The purpose of my visit was to locate some specimens of Carboniferous fossil wood from the Bristol Coalfield", wrote Falcon-Lang in Geology Today. "A rummage quickly turned up the sought after fossils but as we were preparing to leave, my eyes fell on a series of drawers marked ‘unregistered fossil plants’. I can’t resist a mystery, so I pulled one open".

Joseph Hooker

Joseph Hooker (1817-1911) was one of the great botanists of his time and director of Kew Gardens for many years. The slide-mounted samples of fossilised plants in the newly re-discovered collection have the names of donors inscribed on the slides. At least two of the sections of fossil wood were obtained by Darwin during his famous voyage on the Beagle, from 1831 to 1836.

One of the samples (pictured above) comes from Chiloe Island, Chile a place Darwin visited in December 1834 and described it thus: "Chiloe, from its climate is a miserable hole".

There are many specimens from the collection which were not collected by Darwin although understandably given Darwin's fame his samples have stolen a lot of the attention. Other samples are associated with William Nicol, the pioneer of petrography (the detailed study of rocks).

Falcon-Long suggests that the collection probably got lost in the British Geological Survey's storage facility at Keyworth, near Nottingham, UK as a result of bad timing. The Survey didn't start formally registering its acquisitions until 1848. Since then, the samples seem to have been moved around London to various Museums, which at various times held geological collections. It probably arrived in Keyworth in the mid-eighties. Here, a process of cataloguing and photographing is currently ongoing so more fascinating discoveries may yet be waiting around the corner.

You can view a selection from the collection at the British Geological Survey's online museum.

How to Grow a Planet

This week sees the start of what promises to be another great series of science programmes from the BBC with How to Grow a Planet.

The three part series, presented by Prof. Iain Stewart, aims to reveal how the greatest changes to the Earth have been driven, above all, by plants.

Stewart is a geologist and professor of Geoscience Communication at Plymouth University so expect to see the links between ancient plants and geology feature highly in this series.

“I had always thought of plants as being rather boring – less dramatic than the earthquakes and volcanoes I had been studying. But when you realise what plants do at the planet scale, and when you discover just how fundamental they are to life on Earth, they take your breath away", said Stewart.

In the first episode, to be aired on Tuesday 7th February at 9pm on BBC2, Stewart examines how plants first harnessed light energy to create our life-giving atmosphere. He looks at the epic batle between dinosaurs and poisonous plants and promises to use remarkable imagery to show plants 'breathing' and communicating with each other for the first time.

Also in episode one, Stewart will be sealed inside an air-tight chamber at the Eden Project in Cornwall in an attempt to demonstrate the oxygenating properties of the plants sealed in the chamber alongside him.

Stewart added: “I think it was being stuck in a transparent air-tight container for 48 hours with 274 of them that really made me appreciate plants. Locked in there, with half the oxygen removed, I suddenly realised how much I needed plants to keep me alive. It is a hell of a way to highlight something we so take for granted: photosynthesis!”

Here's a sneak preview of episode one:

BASF Moves Plant Biotech Jobs to America

The global biotech and chemical company BASF is to withdraw from Europe and concentrate its plant biotechnology business on North and South America. 140 jobs in Europe will go.

Just when science, technology and biotechnology, in particular, have the capacity to create jobs, build confidence in economies and promote an economic recovery, Europe now risks becoming known for an anti-science agenda.

The company said today that it will halt development and commercialisation of all products targeted solely at the European market because of "a lack of acceptance for this technology" from the majority of consumers, farmers and politicians.

BASF say they are "convinced that plant biotechnology is a key technology for the 21st century" but at this time the "conditions for cultivation of genetically modified crops in Europe are unfavourable".

The move will stop development on Europe-targeted crops such as Amflora, a genetically modified potato variety which provides easy to extract starch for industry. The company will also halt work on its Fortuna potato variety, bred to be resistant to late blight, Phytophthora infestans. BASF had applied for approval from the EU for commercial cultivation of Fortuna late last year. The variety had two resistance genes inserted from a wild relative found in South America.

Despite ceasing development of other such products, BASF have said they will continue with the regulatory approval process already in train.

Greenpeace have welcomed the move claiming that "Europeans don't want GM crops, and for good reason".

Marco Contiero, Greenpeace's agriculture policy director said that it wasn't just health concerns that worried EU consumers; "GM crops go hand in glove with factory farming, pesticide use, pest resistance and disappointing long-term yields".

Today's development sees a company with European origins having to move much of its research and development to the Americas due to continuous delaying and buck-passing when it comes to GM regulations in Europe.

This has created an atmosphere where even the research and development of GM crops, for one company at least, has become impossible.

World’s first night flowering orchid discovered on the island of New Britain

B. nocturnum (Image: J. Vermeulen)

Botanists from the Royal Botanic Gardens, Kew, and the Netherlands Centre for Biodiversity Naturalis have described the first night-flowering orchid known to science. The discovery is published in the Botanical Journal of the Linnean Society.

The new night flowering species, Bulbophyllum nocturnum, from the island of New Britain near Papua New Guinea, is the first known example of an orchid species with flowers that consistently open after dark and close in the morning. Its flowers last one night only.

A relatively small number of plant species have flowers that open at night and close during the day. Until now, no orchids were known among them. This in spite of the fact that many orchids are pollinated by moths. But these moth-pollinated orchids all have flowers that remain open during the day, even if they are mainly pollinated after dark.

Bulbophyllum nocturnum was discovered by Dutch orchid specialist Ed de Vogel on a field trip to the island of New Britain, where he was allowed to collect some orchids in a logging area for cultivation at the Hortus Botanicus in Leiden, the Netherlands.

Under the care of garden manager Art Vogel one of these plant soon produced buds. Their opening was eagerly anticipated as de Vogel and his colleagues had already established that this plant was a member of the Epicrianthes group of orchids of the genus Bulbophyllum. Epicrianthes contains many rare and bizarre species, most of which have only been discovered recently as they occur in some of the remotest jungle habitats on earth.

Frustratingly, however, the buds all withered once they had seemingly reached the size at which they should open. Wanting to get to the bottom of this, de Vogel took the plant home with him one evening in order to find out exactly what happened to the buds.

B. nocturnum (Image: A. Schuiteman)

To his surprise, the bud that was then present opened up at ten in the evening, long after dark, revealing the flower of an undescribed species.

Observations on subsequent buds confirmed that they all opened around 10pm, and closed the next morning around 10am. The flowers lasted only one night, which explained why the buds were seemingly about to open one day and withered the next.

Royal Botanic Gardens, Kew orchid specialist, André Schuiteman, and Leiden Bulbophyllum expert, Jaap Vermeulen, teamed up with de Vogel to investigate and describe this remarkable new species.

Says André Schuiteman of the discovery, “This is another reminder that surprising discoveries can still be made. But it is a race against time to find species like this that only occur in primeval tropical forests. As we all know, such forests are disappearing fast. It is therefore increasingly important to obtain funding for the fieldwork required to make such discoveries.”

Why Bulbophyllum nocturnum has adopted a night flowering habit is unknown and requires further investigation. However, it may be speculated that its pollinators are midges that forage at night.

In February 2012 Kew’s Tropical Extravaganza festival (4 February – 4 March 2012) will celebrate the beauty and diversity of orchids. Orchids make up what is probably the largest plant family on earth, with an estimated 25,000 species. Their flowers show a tremendous range of variation in size, colour and shape.

Bread and Circuses: Putting plants back at the centre of our city

As part of my regular series of posts for the new Cork Independent Blog, I look at the recently announced 'Mardyke Gardens' project and argue that, far from being a waste of money, it could serve to refocus much needed attention on the importance of plants to society.

"While I don’t expect the Mardyke Gardens project to feed the world, it is essential in that it refocuses all our minds on the important of plants, both for their integral beauty and uplifting place in our lives and in our city; and also for the economic benefits they can provide for us. If this project is handled correctly and the scientific elements emphasised, it may well encourage people to look at plants afresh and begin to face the challenges of a rising global population, knowing that plants are central to all our lives on earth."

Read More >>>

"Plant Science has never been more important"

The work of Plant Scientists is crucial to our long-term survival, according to a hard-hitting letter by an international group of botanists and crop scientists published this week.

After an online consultation, the authors have drawn up a list of 100 important questions that urgently need to be addressed by the next generation of plant biologists.

"Plant science has never been more important" the authors state. Global challenges including the production of abundant safe and nutritious food, shelter, clothes, fibre and renewable energy can only be met, according to the authors, "in the context of a strong fundamental understanding of plant biology and ecology, and translation of this knowledge into field-based solutions".

In order to see what questions plant scientists should be considering, the authors compiled a list of 100 important questions facing plant science research.

The top-ten questions are:

• How do we feed our children's children?

• Which crops must be grown and which sacrificed, to feed the billions?

• How can we deliver higher yields but at the same time reduce environmental impact of agriculture?

• What are the best ways to control invasive species of plants, pests and pathogens?

• Should GM crops require special regulation?

• How can plants curb global warming?

• How do plants contribute to maintaining human life on earth?

• What will be the new scientific approaches central to plant biology in the coming century?

• How do we ensure that society appreciates the importance of plants and how can we attract the "best and brightest" into plant science?

• How do we make sure sound science informs policy decisions?

"Plant science is central to addressing many of the most important questions facing humanity", the authors conclude. The importance of plants also extends well beyond agriculture and horticulture as we "face declining  solid fuel reserves, climate change, and a need for more sustainable methods to produce fuel, fibre, wood and industrial feedstocks".

The authors note that training new plant scientists is essential given the central role they will play in the future:
"As plant science becomes increasingly important, we need to attract the brightest and best to careers in plant research. School education does not include the most interesting or relevant aspects of plant science, and discourages young people from studying the subject at university. This is indefensible in a world with such a strong requirement for outstanding plant scientists, and steps should be taken to put it right".

The authors are clear on the importance of plant science research and future plant scientists:
“Everyone knows that we need doctors, and the idea that our best and brightest should go into medicine is embedded in our culture.  However, even more important than medical care is the ability to survive from day to day; this requires food, shelter, clothes, and energy, all of which depend on plants.

“Plant scientists are tackling many of the most important challenges facing humanity in the twenty-first century, including climate change, food security, and fossil fuel replacement.  Making the best possible progress will require exceptional people.  We need to radically change our culture so that ‘plant scientist’ (or, if we can rehabilitate the term, ‘botanist’) can join ‘doctor’, ‘vet’ and ‘lawyer’ in the list of top professions to which our most capable young people aspire.”

You can read the letter, published in the New Phytologist here.

Potato Genome Sequenced

The potato genome has just been published in the journal Nature.

The Potato Genome Sequencing Consortium (PGSC), an international team of scientists including some from Teagasc in Ireland, has published the "genetic blueprint" for the world's third most important food crop.

Scientists say the information will help plant scientists and breeders to improve yield, quality, nutritional value and disease resistance pf potato varieties. The PGSC say it should also allow potato breeders "reduce the 10-12 years currently needed to breed new varieties".

The potato genome is the first sequence of an Asterid to be published - a group of flowering plants encompassing around 25% of all known plant species.

The consortium published a draft sequence in 2009 after a meeting of the consortium in Oakpark, Carlow in Ireland to plan the final phases of the project. The most recent publication is a refined version covering approximately 95% of all the genes in the potato - around 39,000 genes that code for proteins.

Worldwide, it's estimated that a loss of about €3 billion per year in the potato crop arises from diseases such as late blight and potato cyst nematodes. These problems are still largely controlled by frequent applications of fungicides and nematicides.

An indepth knowledge of the genetics of the potato should allow scientists to develop new varieties which show high levels of resistance against these pests and diseases.

The potato genome has 12 chromosomes and an extimate 840 million base pairs.

Speaking on the release of the first draft, Professor Jimmy Burke, head of Teagasc Crops Research Centre and leader of the plant biotechnology programme said: “Research such as this is incredibly important to the future competitiveness of Irish agriculture and puts Teagasc at the forefront of exciting developments in science”.

Combining our expertise in plant breeding with cutting-edge biotechnology-based research is enhancing our ability to develop plant varieties suitable for Irish conditions and agricultural practices. We are pursuing similar projects in other species important to agriculture here in Ireland, including perennial ryegrass, white clover and wheat, and energy crops, and we expect similar successes in these species in the future”.


The Nature paper is available here.
The full sequence is available here.

Mutiny on the Bounty: A Botanical Experiment

The HMS Bounty visited Cork recently as part of a European Tour. The ship is a replica of the original Bounty and was constructed in 1960 for the MGM studios film Mutiny on the Bounty with Marlon Brando.

Update: On 29th October 2012, the Bounty sank off the North Carolina coast during Hurricane Sandy. News item.

The original Bounty was purchased by the British Admiralty as part of unique botanical experiment- to sail to Tahiti in 1787 and collect samples of breadfruit trees (Artocarpus altilis) and transport them to the West Indies where they could be transplanted and used in the British plantations as a cheap source of food for slaves.

William Bligh was chosen to captain the ship and Sir Joseph Banks of Kew sent one David Nelson to be the botanist on board the ship.

When they got to Tahiti, the crew collected 1,015 breadfruit plants and Bligh allowed some of the crew to remain on land for five months caring for the plants. This was a decision he would live to regret. Without the rigour of life onboard, some of the crew resented having to fall back under Bligh's command for the return journey.

Three weeks out of Tahiti, Fletcher Christian led a mutiny aboard the Bounty. Eighteen of the 44 men on board were set adrift along with the captain in the Bounty's launch. This included the botanist Nelson and his plants, which he had carefully tended, were also thrown overboard. The mutineers had apparently resented the fresh water rations being used to keep the plants alive.

The remaining mutineers took control of the ship and eventually settled on Pitcairn Island and burnt the ship in what is now Bounty Bay.

Bligh captained the small boat, without charts, the 3,600 nautical miles to safety at the Dutch port of Coupang in what is now Indonesia.

A few days after arriving, having survived the epic voyage, Nelson spent a day botanising in the mountains, caught a cold, and died.

Bligh noted in his log:
'The loss of this honest man I much lamented; he had with great care and diligence attended to the object for which he was sent. I was sorry I could get no tombstone to place over his remains.'

What started as a botanical experiment ended as one of the most famous ocean journeys ever recorded.


The Bounty has now left Cork and will reach Belfast in a few days to continue its European tour.

Botany - A Blooming History

This Tuesday sees a new season of programmes tracing the history of botany kick off on BBC 4.

The centerpiece of the season is a three-part series: Botany- A Blooming History.

Presented by Timothy Walker, director of Oxford University Botanic Gardens, the series will reveal how a band of pioneers came to understand the mysteries of the plant kingdom and in doing so, helped to unlock the secrets of the natural world.

A Blooming History, will tell the story of how we came to understand the natural order of the plant world and how the quest to discover how plants grow uncovered the secret to life on the planet.

The series features the latest plant science and hows how botanists today are at the forefront of advances to fight disease, provide radical new forms of renewable energy and help feed the world's growing population.

During a journey which will take in the likes of Carl Linnaeus, who laid the groundwork for how we name all living creatures; Thomas Fairchild, the nurseryman who produced the first man-made hybrid and William Bateson, the botanist who coined the term 'genetics', Timothy Walker will show how plants are the centre of modern science.

Along with the three-part series, there is a supporting cast of three one-off documentaries: Apples - British to the Core will look at how Britain has helped shape the apple; Wonderful Weeds aims to look at how some of what we call 'weeds' are more useful than we give them credit for; Hidcote will look at the most influential British garden of the 20th century.

Botany: A Blooming History starts on BBC4 on Tuesday June 7th at 9pm.

(Source: BBC Press Office)

Corpse flower blooms in Basel

The Swiss city of Basel witnessed a rare flowering of the corpse flower, Amorphophallus titanum, over Easter.

The carrion flower is also known as the titan arum and and produces a scent which is not unlike that of a decomposing mammal. The scent is used to attract pollinating insects, in particular carrion flies and beetles, to the flower to transfer pollen. The flowers deep-red colouration also contributes to this carrion-like illusion.

The flower can reach over 3 metres in height but dies back quickly before it is replaced with a single large leaf. The underground corm (swollen plant stem) is the largest in the plant kingdom - around 50 kg.

Found growing in the wild in the rainforests of Indonesia, it is cultivated in many botanical collections around the world but it is notoriously difficult to get to flower.

Interestingly, the popular name titan arum was invented by David Attenborough when he famously filmed the plant for his 'The Private Life of Plants' BBC series. Apparently, he felt that continually referring to the plant by its Latin name on TV would be inappropriate. See video at the end of this post.

The Swiss flower was visited by more than 10,000 people on Saturday alone, each adult paying 10 Swiss Francs for a quick two-minute viewing. All the money raised was going towards funding events at the botanical garden.

Custodian of the Basel Botanical Gardens Heinz Schneider told Swiss TV, "It's crazy! Plant fans from all over Switzerland want to see the titan arum."

By Monday, the flower had wilted but the event was captured on webcam, from which the following series of images were taken (31st March - 27th April).

David Attenborough visits the titan arum in the wild:

(Ignore the title of the video - titan arum is not the biggest flower in the world!)

Christmas Science 18: New Mistletoe Species Discovered

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December.

New mistletoe species among this year's new discoveries at Kew

As the UN's International Year of Biodiversity draws to a close, scientists at the Royal Botanic Gardens, Kew are celebrating the diversity of the planet's plant and fungal life by highlighting some of the weird, wonderful and stunning discoveries they've made this year from the rainforests of Cameroon to the UK's North Pennines. But it's not just about the new – in some cases species long thought to be extinct in the wild have been rediscovered.

Professor Stephen Hopper, Director of the Royal Botanic Gardens, Kew says, "Each year, botanists at the Royal Botanic Gardens, Kew, working in collaboration with local partners and scientists, continue to explore, document and study the world's plant and fungal diversity, making astonishing new discoveries from microscopic fungi to canopy giants. 

"This work has never been more relevant and pressing than in the current era of global climate change and unprecedented loss of biodiversity.Without a name, plants and fungi go unrecognised, their uses unexplored, their wonders unknown.

"On average, 2,000 new plant species are discovered each year, and Kew botanists, using our vast collection of over 8 million plant and fungal specimens, contribute to the description of approximately 10 per cent of these new discoveries. Despite more than 250 years of naming living plants, applying each with a unique descriptive scientific name, we are still some decades away from finishing the task of a global inventory of plants, and even more so for fungi.

"Plants are at risk and extinction is a reality. However stories of discovery and rediscovery give us hope that species can cling on and their recovery is a very real possibility. Continuing support for botanical science is essential if plant based solutions to human challenges, such as climate change, are to be realised."

This year's new showstoppers include;

From Africa with Love - Wild Mozambican Mistletoe …

This parasitic, tropical mistletoe was named in 2010, and was first discovered near the summit of Mount Mabu in northern Mozambique, a region which hit the headlines in 2008 when a Kew-led expedition uncovered this lost world bursting with biodiversity. Since then, the team at Kew have worked tirelessly sorting through the hundreds of specimens they collected, and they have described this new wild mistletoe (Helixanthera schizocalyx), just in time for Christmas!

It was spotted by the expedition's renowned East African butterfly specialist, Colin Congdon, while the team were trekking up the mountain, on a path that took them from the moist montane forest up to where the broad granite peaks break through the dense foliage. Colin quickly realised this species was different from anything he had seen on the mountains in neighbouring Malawi and Tanzania, and on closer inspection back at Kew it was confirmed a new species.

Tropical mistletoes, from the family Loranthaceae, are a great example of biodiversity and the symbiotic relationship between plants and animals. Birds play a vital role in both pollinating these mistletoes, and also distributing the seeds. As birds eat the small fleshy white sweet fruits, the seeds are then wiped on a branch to which they adhere. Once germinated the root grows into the living tissue of the tree to obtain the new plant's nutrients. Tropical mistletoes are also popular with butterflies and in particular the blue group Lycaenidae. These strong links between the plants, their host trees, and various birds and butterflies, shows the interconnected nature of forest species, and the need to conserve all elements in order to preserve the environment.


A Medicinal Wild Aubergine from East Africa…  

Commonly known as 'Osigawai' in the local Masai language, Solanum phoxocarpum was discovered by Maria Vorontsova on an expedition to Kenya's Aberdare mountainous cloud forests. Having researched specimens of wild African aubergines in RBG, Kew's vast Herbarium collections of dried plant specimens, Vorontsova, who was based at the Natural History Museum, London at the time, discovered some unusual unnamed specimens, some of which were unlike any she had seen before. Eager to discover more, Maria set out on an expedition with botanists and seed hunters from Kenya's 'Seeds for Life' project team, partners in Kew's Millennium Seed Bank Partnership.

Many of the old collection locations they visited had been stripped of native vegetation, but after four weeks, the team was successful. They spotted a wild aubergine shrub with distinctive unusual long, yellow, pointed fruits and deep mauve flowers that was indeed a new species. They collected its fruits and set out slicing them open to collect seed for banking. While spreading the fruit's yellow sludge onto paper, so the seeds could dry for long term storage in Kew's Millenium Seed Bank, one of the team noticed that the fruits began to emit a pungent odour and later that day they became ill. It is now believed that this species may be poisonous, and having consulted Kew's historic specimens, it also proves to be used medicinally by local people.


Cameroon Canopy Giant… 

A gigantic tree, Magnistipula multinervia, described excitedly by Kew's well seasoned plant hunter, Xander van der Burgt, as "the rarest tree I have ever found", has been discovered in the lush green rainforests of Cameroon.

Towering above the canopy at 41metres high this critically endangered tree was discovered in the lowland rainforests of the Korup National Park — a hot-bed for new discoveries in the South-West Province of Cameroon. Due to its height, rarity (with only four trees known) and the fact that the flowers hardly ever fall to the ground, it proved difficult to identify and collect in flower. After numerous visits to the four known trees over a period of several years to check if they were flowering and fruiting, the team were successful and using alpine climbing equipment, they managed to scale the dizzy heights, and make their collection, and identify it as new.

Smut and moon carrots – the rediscovery of extinct British fungi… 

The long-lost British fungus, bird's-eye primrose smut (Urocystis primulicola), recognised as a species of "principal importance for the conservation of biological diversity" (BAP review 2007) had not been seen for 106 years until it was rediscovered by Kew and Natural England mycologist, Martyn Ainsworth, during a two hour 'ovary squeezing' session.

Smuts are species of inconspicuous, microscopic fungi that are found inside living host plants, in this case the red-listed wild pink flowered bird's-eye primrose (Primula farinosa) found in the North Pennines. The bird's-eye primrose smut has co-evolved with the plant and hijacks its ovaries, replacing its seeds with a black powdery mass of smut spores. Concealed in the ovaries, it is only when the bird's-eye primrose seed-pods are squeezed in the late summer, when the seeds are ripe, that this rare smut can be found.

In a similar story, the moon carrot rust (Puccinia libanotidis) was rediscovered in England after it was believed lost for 63 years. Rust fungi are so called because their spores are often produced in brownish orange powdery masses on the leaves and stems of host plants. The moon carrot (Seseli libanotis), the plant that hosts this rust, is a red-listed wild plant confined in Britain to the chalky soils of the Chilterns, Gog Magog Hills and the South Downs.

Martyn Ainsworth, Senior Researcher in Fungal Conservation says, "It is always exciting to rediscover species thought to be extinct but to find one that has been lost for over 100 years, while carrying out a quick survey in a likely spot during a journey between England and Scotland, was an exhilarating 'Eureka' moment. To wipe these rare British fungi off the extinct list is a joy, and we hope that with further field surveying we can now provide a clearer picture of these species' current British distribution.
"Both these fungal species have been re-discovered on rare British plants, and therefore their conservation is dependent on that of their host plants and their habitats. I'd encourage all field naturalists to get out and start looking for so-called extinct fungi and find out about their relationships with other fungi, plants and animals so we can understand their habitat and conservation requirements better. There are so few of us doing this work, we need all the help we can get."

And finally the biggest new discovery of them all…

The biggest genome in a living species –bigger than Big Ben!

Scientists in Kew's Jodrell Laboratory, as part of their ongoing research into the causes and consequences of genome size diversity in plants, discovered the largest genome of all living species so far – found in Paris japonica, a subalpine plant endemic to Honshu, Japan.

With a genome size of 152.23 picograms, its genome is 50 times the size of the human genome, and 15% larger than any other found so far —it's so large that when stretched out it would be taller than the tower of Big Ben! However, having such a large genome may have direct biological consequences, as plants with large genomes may be more sensitive to habitat disturbances and environmental changes and be at greater risk of extinction.


All images are courtesy of Kew and are copyright of their respective owners.
  

Christmas Science 14: Misteltoe

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December.

Mistletoe
Mistletoe is the common name for the hemi-parasitic plant Viscum album (European Mistletoe) and is a familiar sight in homes at this time of year.

The term hemi-parasitic means that the plant is both a parasite (i.e. it obtains nutrients and water from a host plant), but that it also photosynthesises itself, to some degree. It's a sort of a middle ground between being completely parasitic and completely free-living.

Viscum album can parasitise over 200 tree and shrub species and can kill these trees eventually. While the plant is poisonous to humans, an array of animals depend on it for food in the wild.

The plant has featured in folklore since Greek mythology and is today (at least in English-speaking countries) hung in the home during the Christmas season. Two people meeting under the mistletoe are obliged to kiss.

The BBC report that Mistletoe may be under threat in the UK.

Christmas Science 5: Christmas Cactus

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December.

Christmas Cactus
Lots of people will be quite familiar with the bright purple flowers and prickly looking foliage of the Christmas Cactus (Schlumbergera truncata). It is widely cultivated and sold as house plants, particularly around this time of year.

There are in fact five species in the genus, all from South America. Four, including S. truncata, are native to the Atlantic Forest of Rio de Janeiro and adjacent parts of Sao Paulo, while the remaining species is geographically isolated from the rest.

S. kautskyi is on the Red List of critically endangered plants and is found in just two small mountain localities, both of which are in an area where recent residential developments are causing significant changes. The species, discovered in 1986, is under increasing pressure in the wild and just small fragments of its home range remain.

This endangered species is very similar to the Christmas Cactus with which we are familiar, with its flattened stem segments and sharply pointed edges. The flowers of the cultivated species however, are much larger than its endangered cousin.

Source: RBG Kew, Plant; J. Marinelli (Ed)

Christmas Science 3: Holly

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December.

Holly
There are about 400 species of Holly (Ilex spp.) around the world, with about 80 of them considered to be threatened in the wild. So called 'English Holly" (Ilex aquifolium) is popular in temperate areas for its attractive red fruits against the dark glossy foliage.

These fruits are also attractive to birds who eat them and deposit seed elsewhere, often under other trees. As 'English Holly' is very shade tolerant, it is becoming invasive in forested areas where it is not native, including old-growth forests in the US.

In Ireland, where I. aquifolium is native, it has a strong association with winter and Christmas. In pre-christian times, Holly was seen as a source of life and growth in winter, when the red fruits and dark-green foliage were at their peak.

Holly berries are somewhat toxic to humans.

Self-pollinating plants more likely to become extinct

Scientists have shown in a recent study that plants that pollinate themselves are more likely to become extinct.
Working with the nightshade plant family, which includes potatoes, peppers, tomatoes and tobacco, the researchers compared speciation and extinction rates for nightshade species that mate exclusively with other plants, versus species that can pollinate themselves.

As Boris Igic, a biologist at the University of Illinois explains: "Plants just can't walk over to potential mates like we do. Many species rely on wind or pollinators coming to them." About half of all flowering plants have another option, said Igic - they can fertilise themselves.

The results collected showed that despite short-term benefits of solitary sex (including not having to rely on wind currents and insects to the job), the plants which exclusively self-pollinated suffered over time.

"Species that can pollinate themselves have much higher extinction rates," says Igic.

The researchers say that a lack of genetic diversity may be the cause of the increased extinction rates the self-pollinated plants. Plants that can pollinate themselves are simply less likely to inherit the genetic variants that enable them to adapt to changing environments.

"It's like playing the stock market," says Stephen Smith, a co-author on the study. "If you put all your eggs in one basket you might win big in the short term. But if you don't maintain a diverse portfolio, in the long run you're less able to endure the market's ups and downs."