Correlation Between Ectoenzyme Activity and Virulence against Planococcus citri of Metarhizium anisopliae F061
The ectoenzyme activity and the virulence against Planococcus citri of Metarhizium anisopliae F061 were determined in the laboratory.Their correlation was established using a linear regression analysis.The activities of two ectoenzymes from the bacteria were high.At concentrations of 1.00 × 108 and 1.00)× 107 conidia · mL 1,the protease activities of the spores were 7.63 U · mL-1 and 7.61 U · mL-1,respectively;while the chitinase activities,5.45 U · mL-1 and 5.67 U · mL 1,respectively;and,the LT50 of the strain against P.citri,4.98 d and 5.39 d,respectively.The LT50inversely correlated significantly with the protease activity,but moderately with the chitinase activity.It appeared that the protease were stronger than the chitinase in M.anisopliae F061,and thus,played a more critical role in infectingP.citri.
国家科技期刊平台
NSTL
万方数据
维普
