当前位置： SCI文献检索 > JOURNAL OF INSECT PHYSIOLOGY期刊下所有文献 > Immunological mechanisms of synergy between fungus Metarhizium robertsii and bacteria Bacillus thuringiensis ssp. morrisoni on Colorado potato beetle larvae.

Immunological mechanisms of synergy between fungus Metarhizium robertsii and bacteria Bacillus thuringiensis ssp. morrisoni on Colorado potato beetle larvae.

Abstract：

:The synergistic effect between the entomopathogenic fungus Metarhizium robertsii and a sublethal dose of the bacterium Bacillus thuringiensis ssp. morrisoni var. tenebrionis was studied in terms of immune defense reactions and detoxification system activity of the Colorado potato beetle, Leptinotarsa decemlineata, fourth instar larvae. Bacterial infection led to more rapid germination of fungal conidia on integuments. We found a significant decrease of cellular immunity parameters, including total hemocyte count and encapsulation response, under the influence of bacteria. Phenoloxidase activity in integuments was increased under bacteriosis, mycosis and combined infection compared to controls. However, phenoloxidase activity in the hemolymph was enhanced under bacteriosis alone, and it was decreased under combined infection. Activation of both nonspecific esterases and glutathione-S-transferases in the hemolymph was shown at the first day of mycosis and third day of bacteriosis. However, inhibition of detoxification enzymes was detected under combined infection. The suppression of cellular immunity and detoxification reactions in Colorado potato beetle larvae with a sublethal dose of bacteria is discussed as a reason for synergy between B. thuringiensis and M. robertsii.

journal_name

J Insect Physiol

journal_title

Journal of insect physiology

authors

Yaroslavtseva ON,Dubovskiy IM,Khodyrev VP,Duisembekov BA,Kryukov VY,Glupov VV

doi

10.1016/j.jinsphys.2016.10.004

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

14-20

eissn

0022-1910

issn

1879-1611

pii

S0022-1910(16)30136-6

journal_volume

96

pub_type

杂志文章

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