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9-cis-epoxycarotenoid dioxygenase 1 confers heat stress tolerance in rice seedling plants

文献类型: 外文期刊

作者: Zhang, Yijin 1 ; Liu, Xiong 1 ; Su, Rui 1 ; Xiao, Yunhua 1 ; Deng, Huabing 1 ; Lu, Xuedan 1 ; Wang, Feng 1 ; Chen, Guihua 1 ; Tang, Wenbang 1 ; Zhang, Guilian 1 ;

作者机构: 1.Hunan Agr Univ, Coll Agron, Changsha, Peoples R China

2.Hunan Prov Key Lab Rice & Rapeseed Breeding Dis Re, Changsha, Peoples R China

3.Hunan Acad Agr Sci, Hunan Hybrid Rice Res Ctr, Changsha, Peoples R China

4.State Key Lab Hybrid Rice, Changsha, Peoples R China

关键词: rice; seedling; heat stress; ABA; OsNCED1

期刊名称:FRONTIERS IN PLANT SCIENCE ( 影响因子:5.6; 五年影响因子:6.8 )

ISSN: 1664-462X

年卷期: 2022 年 13 卷

页码:

收录情况: SCI

摘要: High temperature is one of the main constraints affecting plant growth and development. It has been reported that abscisic acid (ABA) synthesis gene 9-cis-epoxycarotenoid dioxygenase (NCED) positively regulates plant resistance to salt, cold, and drought stresses. However, little is known about the function of the NCED gene in heat tolerance of rice. Here, we found that OsNCED1 was a heat stress inducible gene. Rice seedlings overexpressing OsNCED1 showed enhanced heat tolerance with more abundant ABA content, whereas the knockout mutant osnced1 accumulated less ABA and showed more sensitive to heat stress. Under heat stress, increased expression of OsNCED1 could reduce membrane damage and reactive oxygen species (ROS) level of plants, and elevate the activity of antioxidant enzymes. Moreover, real time-quantitative PCR (RT-qPCR) analysis showed that overexpression of OsNCED1 significantly activated the expression of genes involved in antioxidant enzymes, ABA signaling pathway, heat response, and defense. Together, our results indicate that OsNCED1 positively regulates heat tolerance of rice seedling by raising endogenous ABA contents, which leads to the improved antioxidant capacity and activated expression of heat and ABA related genes.

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