OsPP2C09, a negative regulatory factor in abscisic acid signalling, plays an essential role in balancing plant growth and drought tolerance in rice

• DOI: 10.1111/nph.16670
• Publication Date: 2020-05-20T20:14:23Z
• Authors: Jun Miao; Xianfeng Li; Xiangbo Li; Wenchen Tan; Aiqing You; Shujun Wu; Yajun Tao; Chen Chen; Jun Wang; Dongping Zhang; Zhiyun Gong; Chuandeng Yi; Zefeng Yang; Minghong Gu; Guohua Liang; Yong Zhou
• Keywords: Drought Tolerance

Plants maintain a dynamic balance between plant growth and stress tolerance to optimise their fitness ensure survival. Here, we investigated the roles of clade A type 2C protein phosphatase (PP2C)-encoding gene, OsPP2C09, in regulating trade-off drought rice (Oryza sativa L.). The OsPP2C09 interacted with core components abscisic acid (ABA) signalling showed PP2C activity vitro. positively affected but acted as negative regulator through ABA signalling. Transcript levels were rapidly induced by exogenous treatments, which suppressed excessive arrest. transcript roots much higher than those shoots under normal conditions. After ABA, polyethylene glycol dehydration accumulation rate transcripts was more rapid greater that shoots. This differential expression may increase plant's root-to-shoot ratio drought-stress study sheds new light on coordinating tolerance. In particular, propose OsPP2C09-mediated desensitisation contributes root elongation conditions rice.