Cell Wall Formation Contributes to the Control of Transpiration Efficiency in Arabidopsis
November 19, 2010| |
Scientist Yun-Kuan Liang of the University of Bristol together with other scientists conducted thermal imaging-based screen to identify specific locations of genes in Arabidopsis thaliana that are involved in the transpirational water loss and transpiration efficiency (TE), the biomass produced per water transpired. They discovered that a new form of the cellulose synthase gene CesA7 which is designated as AtCesA7irx3-5 is involved in the regulation of TE. Leaves of the AtCesA7irx3-5 mutant are warmer than the wild type (WT) because of the smaller stomatal pore widths compared with those of the WT. The water-conducting tissues of the mutants were also found to be collapsed and the guard cells are also smaller in size than the WT, probably due to water shortage during development of the leaf. TE of the mutants were higher than the WT. This study reveals a new set of genes involved in TE and suggests that other genes involved in cell wall composition could affect water use efficiency.
Read the summary of this study at http://onlinelibrary.wiley.com/doi/10.1111/j.1365-313X.2010.04362.x/abstract.
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