Bacillus amyloliquefaciens GB1 can effectively control apple valsa canker |
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| Institution: | 1. College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China;2. Zhangzhou Institute of Agricultural Sciences, Zhangzhou, Fujian 363005, China;1. Department of Food Science and Technology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran;2. Centre of Competence for the Innovation in the Agro-environmental Sector-AGROINNOVA, University of Torino, Largo Paolo Braccini 2, I-10095 Grugliasco, TO, Italy;3. DiSAFA-Department of Agricultural, Forestry and Food Sciences, University of Torino, Largo Paolo Braccini 2, I-10095 Grugliasco, TO, Italy;4. Department of Mycology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran;5. Department of Mycology, Pasteur Institute of Iran, Tehran 13164, Iran;6. Microbiology Research Center, Pasteur Institute of Iran, Tehran 13164, Iran;1. Department of Basic Sciences, Dr YS P University of Horticulture and Forestry, Nauni, Solan, 173 230, HP, India;2. Department of Soil Science and Water Management , Dr YS P University of Horticulture and Forestry, Nauni, Solan, 173 230, HP, India;3. Department of Microbiology, DAV University, Jalandhar, Punjab, 144012, India |
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| Abstract: | Apple valsa canker (AVC), caused by Valsa mali, is one of the most serious diseases of apple trees in eastern Asia, and the most important factor limiting apple production in China. This disease is difficult to control by chemical and agricultural measures, thus biocontrol may constitute a desirable alternative strategy. A Bacillus amyloliquefaciens strain denoted GB1 isolated from ageing cucumber stems, exhibited a strong antagonistic activity against V. mali, inhibiting significantly the germination of conidia and the growth of hyphae. GB1 conidial suspensions (above 106 CFU/ml) applied prior to wound inoculation of apple twigs with V. mali resulted in total inhibition of infection. Strain GB1 colonized xylem and phloem tissues surrounding the wounds made on apple twigs and formed biofilms over them. Results indicate that B. amyloliquefaciens GB1 may be a promising agent for the biocontrol of AVC, and provide new insights into the ability of B. amyloliquefaciens to colonize apple trees. |
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| Keywords: | Green fluorescent protein (GFP) Biological control |
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