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Gene helps plants use less water without biomass loss
Date:1/11/2011

n its shoot dry weight was measured.

"The decrease in transpiration leads to increased drought tolerance in the mutant plants," Yoo said. "They will hold more water in their leaves during drought stress."

Of the 20 genes known to control stomata, SDD1 was highly expressed in the mutant. SDD1 is a gene that is responsible for regulating the number of stomata on leaves. In the mutant, with GTL1 not functioning, SDD1 is highly expressed, which results in the development of fewer stomata.

Mickelbart said the finding is important because it opens the possibility that there is a natural way to improve crop drought tolerance without decreasing biomass or yield. He said the next step in the research is to determine the role of GTL1 in a crop plant.


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Contact: Brian Wallheimer
bwallhei@purdue.edu
765-496-2050
Purdue University
Source:Eurekalert

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