Cyclic Lipopeptides of Bacillus amyloliquefaciens DHA6 Are the Determinants to Suppress Watermelon Fusarium Wilt by Direct Antifungal Activity and Host Defense Modulation
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Published:2023-06-19
Issue:6
Volume:9
Page:687
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ISSN:2309-608X
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Container-title:Journal of Fungi
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language:en
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Short-container-title:JoF
Author:
Al-Mutar Dhabyan Mutar Kareem123ORCID, Noman Muhammad12ORCID, Abduljaleel Alzawar Noor Salih4, Azizullah 12, Li Dayong12, Song Fengming12ORCID
Affiliation:
1. Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China 2. Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China 3. Basra Agriculture Directorate, Almudaina 61008, Iraq 4. Ministry of Agriculture, Directorate of Agriculture Extension and Training, Albasra 61001, Iraq
Abstract
Fusarium wilt, caused by Fusarium oxysporum f. sp. niveum (Fon), poses a serious threat to watermelon productivity. We previously characterized six antagonistic bacterial strains, including DHA6, capable of suppressing watermelon Fusarium wilt under greenhouse conditions. This study investigates the role of extracellular cyclic lipopeptides (CLPs) produced by strain DHA6 in Fusarium wilt suppression. Taxonomic analysis based on the 16S rRNA gene sequence categorized strain DHA6 as Bacillus amyloliquefaciens. MALDI-TOF mass spectrometry identified five families of CLPs, i.e., iturin, surfactin, bacillomycin, syringfactin, and pumilacidin, in the culture filtrate of B. amyloliquefaciens DHA6. These CLPs exhibited significant antifungal activity against Fon by inducing oxidative stress and disrupting structural integrity, inhibiting mycelial growth and spore germination. Furthermore, pretreatment with CLPs promoted plant growth and suppressed watermelon Fusarium wilt by activating antioxidant enzymes (e.g., catalase, superoxide dismutase, and peroxidase) and triggering genes involved in salicylic acid and jasmonic acid/ethylene signaling in watermelon plants. These results highlight the critical roles of CLPs as determinants for B. amyloliquefaciens DHA6 in suppressing Fusarium wilt through direct antifungal activity and modulation of plant defense responses. This study provides a foundation for developing B. amyloliquefaciens DHA6-based biopesticides, serving as both antimicrobial agents and resistance inducers, to effectively control Fusarium wilt in watermelon and other crops.
Funder
China Agriculture Research System of MOF and MARA of China
Subject
Plant Science,Ecology, Evolution, Behavior and Systematics,Microbiology (medical)
Reference78 articles.
1. Khan, A.R., Mustafa, A., Hyder, S., Valipour, M., Rizvi, Z.F., Gondal, A.S., Yousuf, Z., Iqbal, R., and Daraz, U. (2022). Bacillus spp. as bioagents: Uses and application for sustainable agriculture. Biology, 11. 2. Bonaterra, A., Badosa, E., Daranas, N., Francés, J., Roselló, G., and Montesinos, E. (2022). Bacteria as biological control agents of plant diseases. Microorganisms, 10. 3. Tyśkiewicz, R., Nowak, A., Ozimek, E., and Jaroszuk-Ściseł, J. (2022). Trichoderma: The current status of its application in agriculture for the biocontrol of fungal phytopathogens and stimulation of plant growth. Int. J. Mol. Sci., 23. 4. Biological disease control by beneficial (micro)organisms: Selected breakthroughs in the past 50 years;Sarrocco;Phytopathology,2023 5. Luo, L., Zhao, C., Wang, E., Raza, A., and Yin, C. (2022). Bacillus amyloliquefaciens as an excellent agent for biofertilizer and biocontrol in agriculture: An overview for its mechanisms. Microbiol. Res., 259.
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