Correlation Between Ectoenzyme Activity and Virulence against <i>Planococcus citri</i> of <i>Metarhizium anisopliae</i> F061

HUANG Peng; YAO Jinai; LIN Yong-wen; YU De-yi

doi:10.19303/j.issn.1008-0384.2017.01.012

Volume 32 Issue 1

Mar. 2017

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HUANG Peng, YAO Jinai, LIN Yong-wen, YU De-yi. Correlation Between Ectoenzyme Activity and Virulence against Planococcus citri of Metarhizium anisopliae F061[J]. Fujian Journal of Agricultural Sciences, 2017, 32(1): 56-59. doi: 10.19303/j.issn.1008-0384.2017.01.012

Citation:

HUANG Peng, YAO Jinai, LIN Yong-wen, YU De-yi. Correlation Between Ectoenzyme Activity and Virulence against Planococcus citri of Metarhizium anisopliae F061[J]. Fujian Journal of Agricultural Sciences, 2017, 32(1): 56-59. doi: 10.19303/j.issn.1008-0384.2017.01.012

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Correlation Between Ectoenzyme Activity and Virulence against Planococcus citri of Metarhizium anisopliae F061

doi: 10.19303/j.issn.1008-0384.2017.01.012

HUANG Peng^{1, 2
,},
YAO Jinai^{1, 2},
LIN Yong-wen³,
YU De-yi^{1, 2
,
,}

1.
Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350013, China
2.
Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou, Fujian 350012, China
3.
College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China

Received Date: 2016-08-11
Rev Recd Date: 2016-11-15
Publish Date: 2017-01-01

Abstract

Abstract

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 LT₅₀ inversely 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 infecting P. citri.
- Metarhizium anisopliae,
- ectoenzyme,
- Planococcus citri,
- virulence,
- correlation

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References(13)

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