数字农科院2.0

Changes in Endogenous Hormones and Protective Enzymes in Hardy Kiwifruit (Actinidia arguta) In Response to Bacterial Canker (Psa) Infection

文献类型： 外文期刊

作者： Qin, Hong-Yan;Chen, Xiu-Ling;Zhao, Ying;Xu, Pei-Lei;Zhang, Bao-Xiang;Wang, Yue;Fan, Shu-Tian;Li, Jia-Qi;Liu, Ying-Xue;Li, Chang-Yu;Lu, Wen-Peng;Ai, Jun;Yang, Yi-Ming

作者机构：

关键词： Actinidia arguta;bacterial canker;salicylic acid (SA);jasmonic acid (JA);protective enzyme

期刊名称： INTERNATIONAL JOURNAL OF FRUIT SCIENCE

ISSN： 1553-8362

年卷期： 2025 年 26 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： The present study investigated changes in endogenous hormones and protective enzyme activities in response to Psa (biovar 2) infection in resistant and susceptible accessions of Actinidia arguta. The resistant accession Cuiyu and susceptible accession TL02062 were inoculated with Psa R12. The activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), phenylalanine ammonia-lyase (PAL), and polyphenol oxidase (PPO), as well as contents of salicylic acid (SA), jasmonic acid (JA), total phenolic, and lignin in plant stems at days 0 (CK), 2, 7, and 14 after inoculation were assessed. After inoculation, the activities of SOD, POD, PAL, and PPO in both resistant and susceptible accessions were significantly increased. The JA content in resistant accessions increased, while that in the susceptible accessions first decreased and then increased. The total phenolic contents of resistant accessions were higher than those of susceptible accessions. The SA content was positively correlated with the JA content and with PAL and POD activities. Lignin content was negatively correlated with the levels of SA, JA, and the activities of PAL and POD. The disease resistance of A. arguta is significant correlations with the levels of SA and JA, as well as the accumulation of polyphenolic compounds. This research indicates that SA and PAL play a pivotal role in regulating the defense responses of A. arguta against Psa infection. By comparing the differential physiological responses of resistant and susceptible accessions to Psa R12, this study provides novel theoretical insights into the physiological and biochemical mechanisms underlying disease resistance in A. arguta, offering valuable references for guiding disease-resistant breeding programs.

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