研究报告 |
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Production, Extraction and Stability for Crude Phytotoxin Produced by Alternaria zinniae |
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Abstract Alternaria zinniae was a plant fungal pathogen isolated from a world-wide weed Xanthium occidentale, which could cause some weeds of Asteraceae disease. It was found that the fungus made disease spot on the leaf through producing secondary metabolite--phytotoxin. The toxin-producing capability of the fungus was studied. The optimal cultural conditions for producing phytotoxin were temperature 25℃, pH 6.5, cultured period 9-11d, enough darkness and dissolved O2, rotating speed. Crude toxin was obtained through large scale fermentation. Analysis on the influence of time, temperature, lightness for storing on the stability of Phytotoxin of Alternaria Zinniae showed that the Phytotoxin had the potential to develop as a herbicide originating from microorganism.
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Received: 19 December 2005
Published: 25 August 2006
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