The researchers conducted a trial in controlled laboratory conditions on a rooftop in central London at the Gro-dome facility at Imperial's South Kensington Campus. They cultivated some willows at an angle of 45 degrees, and looked for any genetic differences between these plants and those allowed to grow naturally straight upwards.
The team then looked for the same effect with willows growing in natural conditions on Orkney Island, off the northern-most coast of Scotland, where winds are regularly so strong that the trees are constantly bent over at severe angles. Their measurements confirmed that the willows here could release five times more sugar than identical trees grown in more sheltered conditions at Rothamsted Research in the south of the UK.
Dr Angela Karp at Rothamsted Research who leads the BBSRC-funded BSBEC-BioMASS project said "We are very excited about these results because they show that some willows respond more to environmental stresses, such as strong winds, by changing the composition of their wood in ways that are useful to us. As breeders this is good news because it means we could improve willow by selecting these types from the huge diversity in our collections".
This work forms part of the BBSRC Sustainable Bioenergy Centre (BSBEC) where it is linked with other programmes aimed at improving the conversion of biomass to fuels. Coupled with work at Rothamsted Research, where the National Willow Collection is held, the new results will help scientists to grow biofuel crops in climatically challenging conditions where the options for growing food crops are limited, therefore minimising conflicts of food versus fuel.
|Contact: Simon Levey|
Imperial College London