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Phosphate starvation response precedes abscisic acid response under progressive mild drought in plants
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Phosphate starvation response precedes abscisic acid response under progressive mild drought in plants
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Journal Article
Phosphate starvation response precedes abscisic acid response under progressive mild drought in plants
2023
Overview
Drought severely damages crop production, even under conditions so mild that the leaves show no signs of wilting. However, it is unclear how field-grown plants respond to mild drought. Here, we show through six years of field trials that ridges are a useful experimental tool to mimic mild drought stress in the field. Mild drought reduces inorganic phosphate levels in the leaves to activate the phosphate starvation response (PSR) in soybean plants in the field. Using
Arabidopsis thaliana
and its mutant plants grown in pots under controlled environments, we demonstrate that PSR occurs before abscisic acid response under progressive mild drought and that PSR plays a crucial role in plant growth under mild drought. Our observations in the field and laboratory using model crop and experimental plants provide insight into the molecular response to mild drought in field-grown plants and the relationship between nutrition and drought stress response.
Even mild drought impacts crop production significantly. Here, the authors develop an experimental mild drought system induced by ridges in the field and find that phosphate starvation response occurs before ABA response in early mild drought.
