文献类型： 外文期刊
作者： Mei, Wentao 1 ; Chen, Wenjuan 1 ; Wang, Yingfeng 1 ; Liu, Zeyun 1 ; Dong, Yating 1 ; Zhang, Guilian 1 ; Deng, Huabing 1 ; Liu, Xiong 1 ; Lu, Xuedan 1 ; Wang, Feng 1 ; Chen, Guihua 1 ; Tang, Wenbang 1 ; Xiao, Yunhua 1 ;
作者机构： 1.Hunan Agr Univ, Coll Agron, Hunan Prov Key Lab Rice & Rapeseed Breeding Dis Re, Changsha 410128, Peoples R China
2.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China
关键词： rice (Oryza sativa L); seedling; cytokinin; heat stress; kinetin
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）
ISSN：
年卷期： 2023 年 24 卷 7 期
页码：
收录情况： SCI
摘要： Heat stress caused by rapidly changing climate warming has become a serious threat to crop growth worldwide. Exogenous cytokinin (CK) kinetin (KT) has been shown to have positive effects in improving salt and drought tolerance in plants. However, the mechanism of KT in heat tolerance in rice is poorly understood. Here, we found that exogenously adequate application of KT improved the heat stress tolerance of rice seedlings, with the best effect observed when the application concentration was 10(-9) M. In addition, exogenous application of 10(-9) M KT promoted the expression of CK-responsive OsRR genes, reduced membrane damage and reactive oxygen species (ROS) accumulation in rice, and increased the activity of antioxidant enzymes. Meanwhile, exogenous 10(-9) M KT treatment significantly enhanced the expression of antioxidant enzymes, heat activation, and defense-related genes. In conclusion, exogenous KT treatment regulates heat tolerance in rice seedlings by modulating the dynamic balance of ROS in plants under heat stress.
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