by Staff Writers
Bristol UK (SPX) May 23, 2012
Although scientists have made significant advances in understanding how plants elongate at high temperature, little is known of the physiological consequences of this response. To investigate these consequences, the researchers, led by Dr Kerry Franklin and Professor Alistair Hetherington in Bristol's School of Biological Sciences, studied thale cress (Arabidopsis thaliana), a small flowering plant which is a popular model species in plant biology and genetics.
When grown at higher temperatures, plants have an elongated, spindly architecture and develop fewer leaf pores, known as stomata. However, in spite of having a reduced number of stomata, the elongated Arabidopsis thaliana plants grown by the team displayed greater water loss and leaf evaporative cooling.
The researchers suggest that the increased spacing of leaves observed in high temperature-grown plants may promote the diffusion of water vapour from stomata, thereby enhancing the cooling process.
Dr Franklin said: "Temperature and water availability are major factors affecting plant yield. Understanding the relationship between temperature, plant architecture and water use is therefore essential for maximising future crop production and ensuring food security in a changing climate."
The research was funded by the Biotechnology and Biological Sciences Research Council (BBSRC). Dr Franklin is supported by a Royal Society Research Fellowship. Paper: Crawford AJ, McLachlan, D, Hetherington, AM and Franklin, KA. (2012) 'High Temperature Exposure Increases Plant Cooling Capacity', Current Biology (ref).
University of Bristol
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UW plant breeders develop an even heart-healthier oat
Madison WI (SPX) May 23, 2012
University of Wisconsin-Madison plant breeders have developed a new oat variety that's significantly higher in the compound that makes this grain so cardio-friendly. "The biggest thing that stands out about this new variety, BetaGene, is that it's both a high yielding variety and high in beta glucan. Beta glucan is a heart-healthy chemical that is exclusive to oats," says John Mochon, prog ... read more
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