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Drought tolerance in crops: Shutting down the plant's growth inhibition under mild stress
Date:5/11/2011

Gent - VIB/UGent researchers have unveiled a mechanism that can be used to develop crop varieties resistant to mild droughts. For years, improving drought tolerance has been a major aim of academic and industrial research, thereby focusing on effects of extreme drought stress. However, translating this research to the field has proven to be problematic. In a set of papers in Nature Biotechnology and the Plant Cell, the team of Dirk Inz at the VIB Department of Plant Systems Biology, UGent now shows that the focus should be on mild drought stress instead. It turns out that under non-lethal stress conditions plants inhibit growth more than absolutely necessary, opening new opportunities for yield improvement.

"By applying this knowledge to the selection of new crop varieties, unnecessary yield losses through drought stress can be avoided, resulting in higher productivity," Dirk Inz from VIB-UGent said.

Producing more food with less water

Only recently the World Bank warned that the world is facing a devastating food price crisis, with yield losses due to weather events being named one of the components of this complex problem. Producing more food on limited arable land, considering the increasing scarcity of water and unpredictability of the weather due to global warming, will be one of the major challenges for this century. One way to increase crop productivity is targeting drought stress, which is currently the main factor decreasing actual yields. Research in this area however so far largely failed to result in crops that perform better in drought conditions.

Plant response differs between severe and mild drought stress

Much of this research has focused on improved plant survival under very severe drought. However, as shown by Aleksandra Skirycz and Korneel Vandenbroucke, plants that are more likely to survive these extreme conditions do not grow better under more mild drought conditions.
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Contact: Joris Gansemans
info@vib.be
329-244-6611
VIB (the Flanders Institute for Biotechnology)
Source:Eurekalert

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