数字农科院2.0

Melatonin Promotes SGT1-Involved Signals to Ameliorate Drought Stress Adaption in Rice

文献类型： 外文期刊

作者： Ruiqing Li;Ruifang Yang;Wenyin Zheng;Liquan Wu;Can Zhang;Huali Zhang

作者机构：

关键词： ABI5;Drought stress;Melatonin;Oryza sativa L;SGT1;Signals

期刊名称： International Journal of Molecular Sciences

ISSN： 1661-6596

年卷期： 2022 年 23 卷 2 期

页码：

收录情况： JCR（2021版）

摘要： Drought has become one of the environmental threats to agriculture and food security. Applications of melatonin (MT) serve as an effective way to alleviate drought stress, but the un-derlying mechanism remains poorly understood. Here, we found that foliar spray of 100-µM MT greatly mitigated the severe drought stress-induced damages in rice seedlings, including improved survival rates, enhanced antioxidant system, and adjusted osmotic balance. However, mutation of the suppressor of the G2 allele of skp1 (OsSGT1) and ABSCISIC ACID INSENSITIVE 5 (OsABI5) abolished the effects of MT. Furthermore, the upregulated expression of OsABI5 was detected in wild type (WT) under drought stress, irrespective of MT treatment, whereas OsABI5 was significantly down-regulated in sgt1 and sgt1abi5 mutants. In contrast, no change of the OsSGT1 expression level was detected in abi5. Moreover, mutation of OsSGT1 and OsABI5 significantly suppressed the expression of genes associated with the antioxidant system. These results suggested that the functions of OsSGT1 in the MT-mediated alleviation of drought stress were associated with the ABI5-mediated signals. Collectively, we demonstrated that OsSGT1 was involved in the drought response of rice and that melatonin promoted SGT1-involved signals to ameliorate drought stress adaption.

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