Carbon monoxide enhances the resistance of jujube fruit against postharvest Alternaria rot
Shaoying Zhang, Qiong Wang, Yijing Guo, Lin Kang and Youwei Yu
Postharvest Biology and Technology, Volume 168, October 2020, 111268
2020
บทคัดย่อ
CO is a gas signal molecule involved in various physiological and metabolic regulation processes in plants. In the present study, we evaluated the effects of CO fumigation on the control of Alternaria rot in jujube fruit and explored the mechanism of action. Results showed that CO at 10โ€ฏµmolโ€ฏL−1 significantly reduced lesion diameter in the fruit inoculated with A. alternata without showing any antifungal activity in vitro. CO treatment enhanced the activities of four representative resistance-related enzymes (phenylalanine ammonia-lyase, polyphenol oxidase, chitinase, and β-1,3-glucanase). Furthermore, CO also led to increase in the content of phenolics, flavonoids, lignin, and H2O2. These results indicate that CO induces resistance to Alternaria rot primarily by activating disease resistance-related enzymes and enhancing accumulation of antifungal substances, and that CO can be a promising elicitor of plant defense responses to resist Alternaria rot in postharvest jujube fruit.