Antifungal effect and mechanism of chitosan against the rice sheath blight pathogen, Rhizoctonia solani
| Autor: | Bin Li, Guochang Sun, Muhammad Ibrahim, Zhongyun Tao, Yangli Wang, Guoxing Wu, Guan-Lin Xie, Wen-Xiao Tian, Hongye Li, He Liu |
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| Rok vydání: | 2012 |
| Předmět: |
Antifungal Agents
Bioengineering Phenylalanine ammonia-lyase Applied Microbiology and Biotechnology Polyphenol oxidase Microbiology Rhizoctonia Chitosan Rhizoctonia solani chemistry.chemical_compound Microscopy Electron Transmission Pathogen Mycelium Plant Diseases biology food and beverages Oryza General Medicine equipment and supplies biology.organism_classification chemistry Seedling biology.protein Microscopy Electron Scanning Biotechnology Peroxidase |
| Zdroj: | Biotechnology letters. 34(12) |
| ISSN: | 1573-6776 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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