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Antifungal effect and mechanism of chitosan against the rice sheath blight pathogen, Rhizoctonia solani

文献类型: 外文期刊

作者: Liu, He 1 ; Tian, Wenxiao 1 ; Li, Bin 1 ; Wu, Guoxing 2 ; Ibrahim, Muhammad 1 ; Tao, Zhongyun 1 ; Wang, Yangli 3 ; Xie, G 1 ;

作者机构: 1.Zhejiang Univ, State Key Lab Rice Biol, Inst Biotechnol, Hangzhou 310058, Zhejiang, Peoples R China

2.Yunnan Agr Univ, Coll Plant Protect, Kunming 650201, Peoples R China

3.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, Hangzhou 310021, Zhejiang, Peoples R China

关键词: Antifungal activity;Antifungal mechanism;Chitosan;Rhizoctonia solani;Rice

期刊名称:BIOTECHNOLOGY LETTERS ( 影响因子:2.461; 五年影响因子:2.457 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: The antifungal properties and mechanism of three types of chitosan against the rice sheath blight pathogen, Rhizoctonia solani, were evaluated. Each chitosan had strong antifungal activity against R. solani and protected rice seedlings from sheath blight, in particular, two types of acid-soluble chitosan caused a 60-91% inhibition in mycelial growth, 31-84% inhibition of disease incidence, and 66-91% inhibition in lesion length. The mechanism of chitosan in protection of rice from R. solani pathogen was attributed to direct destruction of the mycelium, evidenced by scanning and transmission electron microscopic observations and pathogenicity testing; indirect induced resistance was evidenced by the changes in the activities of the defense-related phenylalanine ammonia lyase, peroxidase and polyphenol oxidase in rice seedling. To our knowledge, this is the first report on the antifungal activity of chitosan against rice R. solani.

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