首页|The CBL-interacting protein kinase OsCIPK1 phosphorylated by SAPK10 positively regulates responses to ABA and osmotic stress in rice

The CBL-interacting protein kinase OsCIPK1 phosphorylated by SAPK10 positively regulates responses to ABA and osmotic stress in rice

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Subclass Ⅲ sucrose nonfermenting1-related protein kinase 2s(SnRK2s)function in ABA and abiotic stress responses by unknown mechanisms.We found that osmotic stress/ABA-activated protein kinase 10(SAPK10),a member of rice SnRK2s,physically interacted with CBL-interacting protein kinase 1(OsCIPK1).OsCIPK1 expression was up-regulated by ABA and PEG treatment,and overexpression increased the ABA sensitivity of seed germination and root growth and plant osmotic stress tolerance.Osmotic stress or ABA-induced activation of OsCIPK1 is dependent on SAPK10.SAPK10 phosphorylates Thr-24 of OsCIPK1 in vitro,and this phosphorylation increases the activity of OsCIPK1 and positively reg-ulates the function of OsCIPK1 in ABA responses and plant osmotic stress tolerance.This study suggests that OsCIPK1 is a direct phosphorylated substrate of SAPK10,and SAPK10-mediated phosphorylation of OsCIPK1 functions in ABA signaling and increases rice osmotic stress tolerance.

RiceABAOsmotic stressOsCIPK1SAPK10

Caihua Qin、Xing Fan、Qianqian Fang、Lan Ni、Mingyi Jiang

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College of Life Sciences,State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization,Key Laboratory of Crop Physiology Ecology and Production Management,Ministry of Agriculture,Nanjing Agricultural University,Nanjing 210095,Jiangsu,China

国家自然科学基金国家自然科学基金

3197182432170316

2024

10.1016/j.cj.2024.01.004

作物学报(英文版)

作物学报(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.12(2)
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