1
|
Zhao H, Liu K, Fan Y, Cao J, Li H, Song W, Liu Y, Miao M. Cell-free supernatant of Bacillus velezensis suppresses mycelial growth and reduces virulence of Botrytis cinerea by inducing oxidative stress. Front Microbiol 2022; 13:980022. [PMID: 35992680 PMCID: PMC9389153 DOI: 10.3389/fmicb.2022.980022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 07/19/2022] [Indexed: 12/02/2022] Open
Abstract
As a notorious pathogenic fungus, Botrytis cinerea has been reported to infect more than 1400 species of plants and cause postharvest gray mold of numerous economic fruits, leading to substantial economic losses. Traditional chemical fungicides in pathogen control have potential issues regarding environmental pollution, disease resistance and human health. More safety and efficacious prevention technique of postharvest gray mold are in urgent demand. This study aims to investigate the potential function and mechanism of Bacillus velezensis to control gray mold for harvested fruits. The results showed that the cell-free supernatant (CFS) generated from B. velezensis strain A4 was able to inhibit spore germination, germ tube elongation and hyphal growth of B. cinerea in vitro, and impair the pathogenicity of B. cinerea on the four tested fruits. Further analysis demonstrated that CFS significantly reduced the expression of genes associated with growth and pathogenicity and weakened the ability of B. cinerea spores to penetrate plant cell walls in a dose-dependent manner. Moreover, the CFS destroyed the membrane of hyphae, resulting in exosmosis of cell contents and caused hyphal cells to accumulate excessive reactive oxygen species (ROS), leading to hyphal oxidative damage. Our findings indicate that B. velezensis CFS can damage B. cinerea mycelial cells by promoting excessive accumulation of ROS to realize its biological control function.
Collapse
Affiliation(s)
- Huanlan Zhao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Kui Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
- Institute of Botany, Chinese Academy of Sciencess, Beijing, China
| | - Yezhen Fan
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Jiacan Cao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
- School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Huanghuan Li
- School of Biological Science and Engineering, North Minzu University, Yinchuan, China
| | - Wu Song
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Yongsheng Liu
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Science, Sichuan University, Chengdu, China
- School of Horticulture, Anhui Agricultural University, Hefei, China
| | - Min Miao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
- *Correspondence: Min Miao,
| |
Collapse
|
2
|
Yang C, Lu JH, Xu MT, Shi XC, Song ZW, Chen TM, Herrera-Balandrano DD, Zhang YJ, Laborda P, Shahriar M, Wang SY. Evaluation of chitosan coatings enriched with turmeric and green tea extracts on postharvest preservation of strawberries. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|