Phosphate starvation response precedes abscisic acid response under progressive mild drought in plants

Yukari Nagatoshi, Kenta Ikazaki, Yasufumi Kobayashi, Nobuyuki Mizuno, Ryohei Sugita, Yumiko Takebayashi, Mikiko Kojima, Hitoshi Sakakibara, Natsuko I. Kobayashi, Keitaro Tanoi, Kenichiro Fujii, Junya Baba, Eri Ogiso-Tanaka, Masao Ishimoto, Yasuo Yasui, Tetsuji Oya and Yasunari Fujita ()
Additional contact information
Yukari Nagatoshi: Japan International Research Center for Agricultural Sciences (JIRCAS)
Kenta Ikazaki: Crop, Livestock and Environment Division, JIRCAS
Yasufumi Kobayashi: Japan International Research Center for Agricultural Sciences (JIRCAS)
Nobuyuki Mizuno: Kyoto University, Kyoto
Ryohei Sugita: Nagoya University
Yumiko Takebayashi: RIKEN Center for Sustainable Resource Science
Mikiko Kojima: RIKEN Center for Sustainable Resource Science
Hitoshi Sakakibara: RIKEN Center for Sustainable Resource Science
Natsuko I. Kobayashi: The University of Tokyo
Keitaro Tanoi: The University of Tokyo
Kenichiro Fujii: Japan International Research Center for Agricultural Sciences (JIRCAS)
Junya Baba: Japan International Research Center for Agricultural Sciences (JIRCAS)
Eri Ogiso-Tanaka: National Agricultuetre and Food Research Organization (NARO)
Masao Ishimoto: National Agricultuetre and Food Research Organization (NARO)
Yasuo Yasui: Kyoto University, Kyoto
Tetsuji Oya: Crop, Livestock and Environment Division, JIRCAS
Yasunari Fujita: Japan International Research Center for Agricultural Sciences (JIRCAS)

Nature Communications, 2023, vol. 14, issue 1, 1-16

Abstract: Abstract 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.

Date: 2023
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DOI: 10.1038/s41467-023-40773-1

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