Phosphate starvation response precedes abscisic acid response under progressive mild drought in plants
Phosphate starvation response precedes abscisic acid response under progressive mild drought in plants
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DOI：
10.1101/2021.07.28.453724
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发表时间：
2021-07
影响因子：
16.6
通讯作者：
Yukari Nagatoshi;K. Ikazaki;Yasufumi Kobayashi;N. Mizuno;R. Sugita;Yumiko Takebayashi;M. Kojima;H. Sakakibara;N. Kobayashi;K. Tanoi;K. Fujii;Junya Baba;Eri Ogiso-Tanaka;M. Ishimoto;Y. Yasui;T. Oya;Y. Fujita
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作者：
Yukari Nagatoshi;K. Ikazaki;Yasufumi Kobayashi;N. Mizuno;R. Sugita;Yumiko Takebayashi;M. Kojima;H. Sakakibara;N. Kobayashi;K. Tanoi;K. Fujii;Junya Baba;Eri Ogiso-Tanaka;M. Ishimoto;Y. Yasui;T. Oya;Y. Fujita
干旱严重损害作物产量，即使在如此温和的条件下，叶子也没有枯萎的迹象。然而，目前还不清楚田间生长的植物如何应对轻度干旱。在这里，我们通过6年的田间试验表明，山脊是一个有用的实验工具，以模拟轻度干旱胁迫的领域。轻度干旱会降低叶片中无机磷水平，从而激活田间大豆植株的磷饥饿反应。利用拟南芥及其突变体植物在盆栽条件下生长的受控环境中，我们证明了磷饥饿反应（PSR）发生在脱落酸反应进行性轻度干旱下，PSR在植物生长中起着至关重要的作用。我们在田间和实验室使用模式作物和实验植物的观察提供了深入了解田间生长的植物对轻度干旱的分子反应以及营养和干旱胁迫反应之间的关系。
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 6 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 in soybean plants in the field. Using Arabidopsis thaliana and its mutant plants grown in pots under controlled environments, we demonstrate that phosphate starvation response (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.