Effects of Bacillus velezensis zk1 on the physiology and metabolism of peaches |
| |
| Authors: | Yaoying Zeng Qian Yu Shujun Cheng |
| |
| Affiliation: | 1. College of Food Science and Technology, Zhongkai University of Agriculture and Engineering, 501 Zhongkai Road, Haizhu District, Guangdong, 510225 China;2. College of Food Science and Technology, Zhongkai University of Agriculture and Engineering, 501 Zhongkai Road, Haizhu District, Guangdong, 510225 China
Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), Funding acquisition (equal), ?Investigation (equal), Methodology (equal), Project administration (equal), Resources (equal), Software (equal), Supervision (equal), Validation (equal), Visualization (equal), Writing - original draft (equal), Writing - review & editing (equal) |
| |
| Abstract: | Bacillus velezensis zk1 is the dominant bacterium that causing rot in peaches. However, the mechanisms through that this bacterium causes rot have not been elucidated. Here, we explored the mechanisms of peach decay caused by B. velezensis zk1. The invasion of B. velezensis zk1 in peaches resulted in an increase in glucose and arabinose contents in fruit tissues. Moreover, the relative conductivity of the fruit reached 84% after 4 days of culture with bacterial invasion. With the destruction of cells, the malondialdehyde content increased, whereas the vitamin C, dialdehyde, flavonoid and total phenol contents decreased. Polyphenol oxidase, superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and ammonia lyase activities also decreased. Overall, these findings demonstrated that B. velezensis zk1 infection damaged peach chloroplasts, mitochondria, respiratory chain activity and related free radical scavenging enzyme systems, thereby disrupting the normal physiological metabolism of peaches and causing rot. |
| |
| Keywords: | Bacillus velezensis zk1 decay mechanism free radical scavenging enzyme system |
|
|
