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Gan L, Dai YL, Yang XJ, DU YX, Shi NN, Ruan HC, Chen FR. [Biological effects of root exudates from resistant and susceptible banana varieties on Fusaiurm oxysporum f. sp. cubense and Bacillus subtilis]. Ying Yong Sheng Tai Xue Bao 2020; 31:2279-2286. [PMID: 32715692 DOI: 10.13287/j.1001-9332.202007.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Root exudates of banana resistant variety ('Nantianhuang') and susceptible variety ('Guijiao No. 6') to Fusarium wilt were collected in vitro by bathing root system to examine the biological effects of root exudates from banana varieties on Fusaiurm oxysporum f. sp. cubense and Bacillus subtilis. We explored the effects of root exudates of different banana varieties on the abundance of soil microorganisms and the growth of F. oxysporum f. sp. cubense and B. subtilis. The results showed that root exudates from resistant variety could significantly reduce the abundance of soil fungi and inhibit the spore germination of F. oxysporum f. sp. cubense. Root exudates from susceptible variety could significantly stimulate mycelia growth and spores germination, whereas root exudates from the tested banana varieties could significantly increase the growth and biofilm formation of B. subtilis. By dealing with the root exudates of resistant and susceptible varieties, the growth rate of mycelia were 11.28 and 12.28 mm·d-1, and the germination rate of spores were 34.6% and 79.5%, respectively. After culturing for 12 h, the growth rates of B. subtilis (OD600) were 1.27 and 1.14, and the biofilm formation (OD570) were 1.11 and 1.30 after static culturing 72 h, respectively. There were significant differences between the values of resistant and susceptible varieties. The colonization amount of B. subtilis in the rhizosphere of susceptible variety was significantly higher than that of resistant variety. The contents of free amino acids and organic acid in root exudates of the resistant variety were higher than that of susceptible variety. The content ratio of acetic acid and proline in the root exudates of resistant variety were 3.7 times and 2.4 times of that of susceptible variety. In conclusion, root exudates of banana resistant variety could inhibit the growth of F. oxysporum f. sp. cubense. Root exudates from susceptible variety could promote the growth of F. oxysporum f. sp. cubense,while that from the tested banana varieties could all significantly enhance growth, biofilm formation and colonization ability of B. subtilis.
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Affiliation(s)
- Lin Gan
- Institute of Plant Protection, Fujian Academy of Agricultural Science, Fuzhou 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou 350003, China
| | - Yu-Li Dai
- Institute of Plant Protection, Fujian Academy of Agricultural Science, Fuzhou 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou 350003, China
| | - Xiu-Juan Yang
- Institute of Plant Protection, Fujian Academy of Agricultural Science, Fuzhou 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou 350003, China
| | - Yi-Xin DU
- Institute of Plant Protection, Fujian Academy of Agricultural Science, Fuzhou 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou 350003, China
| | - Niu-Niu Shi
- Institute of Plant Protection, Fujian Academy of Agricultural Science, Fuzhou 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou 350003, China
| | - Hong-Chun Ruan
- Institute of Plant Protection, Fujian Academy of Agricultural Science, Fuzhou 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou 350003, China
| | - Fu-Ru Chen
- Institute of Plant Protection, Fujian Academy of Agricultural Science, Fuzhou 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou 350003, China
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