脱落酸通过调节乙烯和过氧化氢代谢减轻冷藏桃果实的冷害。

Abscisic acid alleviates chilling injury in cold-stored peach fruit by regulating ethylene and hydrogen peroxide metabolism.

作者信息

Tang Jixing, Zhao Yaoyao, Qi Shuning, Dai Qi, Lin Qiong, Duan Yuquan

机构信息

Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China.

Department of Food Science, Shenyang Agricultural University, Shenyang, China.

出版信息

Front Plant Sci. 2022 Sep 6;13:987573. doi: 10.3389/fpls.2022.987573. eCollection 2022.

Peach ( (L.) Batsch) is susceptible to chilling injury under improper low-temperature storage (2°C-5°C). Previous research has shown that abscisic acid (ABA) alleviates chilling injury in fruits and vegetables, but the potential mechanism is still unclear. To explore its effectiveness and potential mechanism in alleviating chilling injury during cold storage, exogenous ABA was applied to peach fruit by immersion in 100 μmol L solutions for 10 min. In our experiment, ABA alleviated chilling injury by reducing hydrogen peroxide (HO) content and ethylene production. In addition, ABA inhibited the expression of the ethylene synthesis-related genes and . At the same time, ABA activated the antioxidant enzymatic pathway and the ascorbate-glutathione (AsA-GSH) cycle, the transcript abundance encoding genes related to antioxidant enzyme activities also changed correspondingly. The results suggested that ABA alleviated chilling injury by scavenging excessive HO by promoting antioxidant enzymes and the AsA-GSH pathway.

桃（(L.) Batsch）在不当的低温储存（2°C - 5°C）条件下易受冷害。先前的研究表明，脱落酸（ABA）可减轻果蔬的冷害，但其潜在机制仍不清楚。为探究其在减轻冷藏期间冷害方面的有效性和潜在机制，将桃果实浸入100 μmol/L溶液中10分钟，施加外源ABA。在我们的实验中，ABA通过降低过氧化氢（HO）含量和乙烯产量减轻冷害。此外，ABA抑制乙烯合成相关基因和的表达。同时，ABA激活抗氧化酶途径和抗坏血酸 - 谷胱甘肽（AsA - GSH）循环，与抗氧化酶活性相关的编码基因的转录丰度也相应改变。结果表明，ABA通过促进抗氧化酶和AsA - GSH途径清除过量的HO来减轻冷害。