Optimize culture conditions for biomass and sporulation of the nematophagous fungus Pochonia chlamydosporia, isolate HSY-12-14 by "two-step" cultivation

文献类型： 外文期刊

第一作者： Gao, Li

作者： Gao, Li

作者机构：

关键词： Nutrition;environment;sporulation;biological control;mass selection

期刊名称：AFRICAN JOURNAL OF MICROBIOLOGY RESEARCH （ 影响因子：0.539； 五年影响因子：0.564 ）

ISSN： 1996-0808

年卷期： 2011 年 5 卷 27 期

页码：

收录情况： SCI

摘要： Biomass yields and sporulation of Pochonia chlamydosporia isolate HSY-12-14 was concerned on culture conditions including culture method, nutritional requirements together with environmental factors in this study. We optimized them for biomass yields of P. chlamydosporia HSY-12-14 with the "two-step" cultivation method as well as orthogonal matrix method: firstly cultured spore suspension on the basal medium (sucrose 19.00 g, soy peptone 4.06 g, K(2)HPO(4) 1.00 g, KCl 0.50 g, MgSO(4) 0.50 g, FeSO(4) 0.01 g and 17.00 g Bactor) for the first stage culture of 4 days under room condition, then transferred them to another defined medium (sucrose 19.05 g, soypeptone 0.01 g, ZnSO(4)center dot 7H(2)O 0.05 g/L, MnSO(4)center dot H(2)O 0.05 g/L, H(3)BO(4) 0.05 g/L and 17.00 g Bactor) for more 4 days cultivation, together with the environmental factors combination of water potential -3.9 MPa /pH 4 /24 h light cycle/23 degrees C for biomass yields. We optimized the best culture conditions for sporulation of P. chlamydosporia under water potential -1.2 MPa /pH 4 /24 h light cycle/32 degrees C wit h the same nutrition for biomass yields. These results is characterized in that it supplies the composition of media and environmental suitable for the mass production and provide important information industrialization of this great potential biocontrol fungus.

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