Production,Extraction and Stability for Crude Phytotoxin Produced by Alternaria zinniae
- VernacularTitle:百日草链格孢菌粗毒素的生产、提取及稳定性的研究
- Author:
Rong-Jin LI
;
Sheng QIANG
;
- Publication Type:Journal Article
- Keywords:
Alternaria zinniae Production of phytotoxin Toxin extraction Microreticular resin Stability
- From:
China Biotechnology
2006;0(08):-
- CountryChina
- Language:Chinese
-
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,rotating speed 110r/min,darkness and enough dissolved O_2,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.
