Methyl jasmonate attenuates chilling injury of prune fruit by maintaining ROS homeostasis and regulating GABA metabolism and energy status

文献类型： 外文期刊

第一作者： Zhao, Yating

作者： Zhao, Yating;Wu, Yingjie;Zhang, Xuan;Zhu, Xuan;Li, Xuewen;Wu, Wenxin;Hou, Yuanyuan;Chen, Jianye;Cui, Kuanbo

作者机构：

关键词： Methyl jasmonate; Prune fruit; Chilling injury; ROS homeostasis; GABA; Energy status

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：6.8； 五年影响因子：7.5 ）

ISSN： 0925-5214

年卷期： 2025 年 220 卷

页码：

收录情况： SCI

摘要： Cold storage is an important means to prolong the storage life of postharvest fruits. However, prunes are prone to chilling injury (CI) at low temperatures, which in turn reduces their marketability. In this study, methyl jasmonate (MeJA) effectively inhibited the occurrence of CI, and reduced internal browning index and electrolyte leakage of prune fruit under low temperature (1 +/- 1 degrees C), with the most significant inhibitory effect observed at the concentration of 10 mu M. Also, MeJA alleviated the overproduction of reactive oxygen species (ROS) by promoting the activity of antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase) and the expression level of their coding genes, thereby maintaining the integrity of the mitochondrial structure of prune fruit. Moreover, MeJA maintained higher content of gamma-aminobutyric acid (GABA) through stimulating glutamate decarboxylase activity and retained higher energy levels by promoting the activity of succinate dehydrogenase, cytochrome C oxidase, H+-ATPase, Ca2+-ATPase, GABA transaminase, and succinic semialdehyde dehydrogenase and expression level of the corresponding gene of prune fruit. Our findings not only shed light on the inhibitory effect of MeJA on CI of prune fruit from the perspective of reducing ROS-induced oxidative damage to maintain mitochondrial structure, activating GABA shunt, and maintaining energy supply but also provide means of alleviating CI of prune fruit during postharvest storage.

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