数字农科院2.0

ATP Hydrolysis Determines Cold Tolerance by Regulating Available Energy for Glutathione Synthesis in Rice Seedling Plants

文献类型： 外文期刊

作者： Pinghui Yu ; Ning Jiang +; Weimeng Fu ; Guangjie Zheng ; Guangyan Li ; Baohua Feng ; Tingting Chen;; Jiaying Ma ; Hubo Li ; Longxing Tao *; Guanfu Fu *

作者机构：

关键词： ATP hydrolysis; Antioxidation; Cold stress; Energy status; Glutathione; Oryza sativa

期刊名称： Rice

ISSN： 1939-8425

年卷期： 2020 年 13 卷 1 期

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收录情况： JCR（2021版）

摘要： Background Glutathione (GSH) is important for plants to resist abiotic stress, and a large amount of energy is required in the process. However, it is not clear how the energy status affects the accumulation of GSH in plants under cold stress. Results Two rice pure lines, Zhongzao39 (ZZ39) and its recombinant inbred line 82 (RIL82) were subjected to cold stress for 48 h. Under cold stress, RIL82 suffered more damages than ZZ39 plants, in which higher increases in APX activity and GSH content were showed in the latter than the former compared with their respective controls. This indicated that GSH was mainly responsible for the different cold tolerance between these two rice plants. Interestingly, under cold stress, greater increases in contents of carbohydrate, NAD(H), NADP(H) and ATP as well as the expression levels of GSH1 and GSH2 were showed in RIL82 than ZZ39 plants. In contrast, ATPase content in RIL82 plants was adversely inhibited by cold stress while it increased significantly in ZZ39 plants. This indicated that cold stress reduced the accumulation of GSH in RIL82 plants mainly due to the inhibition on ATP hydrolysis rather than energy deficit. Conclusion We inferred that the energy status determined by ATP hydrolysis involved in regulating the cold tolerance of plants by controlling GSH synthesis.

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