Toxicological and biochemical basis of synergism between the entomopathogenic fungus Lecanicillium muscarium and the insecticide matrine against Bemisia tabaci (Gennadius)
The sweetpotato whitefly Bemisia tabaci (Gennadius) was challenged with different combinations of matrine (insecticide) and Lecanicillium muscarium (entomopathogenic fungus). Our results revealed a synergistic relationship between matrine and L. muscarium on mortality and enzyme activities of B. tab...
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Published in | Scientific reports Vol. 7; no. 1; p. 46558 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
London
Nature Publishing Group UK
20.04.2017
Nature Publishing Group |
Subjects | |
Online Access | Get full text |
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Summary: | The sweetpotato whitefly
Bemisia tabaci
(Gennadius) was challenged with different combinations of matrine (insecticide) and
Lecanicillium muscarium
(entomopathogenic fungus). Our results revealed a synergistic relationship between matrine and
L. muscarium
on mortality and enzyme activities of
B. tabaci
. To illustrate the biochemical mechanisms involved in detoxification and immune responses of
B. tabaci
against both control agents, activities of different detoxifying and antioxidant enzymes were quantified. After combined application of matrine and
L. muscarium
, activities of carboxylestrease (CarE), glutathione-s-transferase (GSTs) and chitinase (CHI) decreased during the initial infection period. Acetylcholinestrase (AChE) activities increased during the entire experimental period, whereas those of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) decreased during the later infection period. The increased mortality and suppression of enzymatic response of
B. tabaci
following matrine and
L. muscarium
application suggests a strong synergistic effect between both agents. The strong synergistic effect is possibly related to the disturbance of acetylcholine balance and changes in AchE activities of the whitefly as both matrine and
L. muscarium
target insect acetylcholine (Ach) receptors which in turn effects AchE production. Therefore, our results have revealed the complex biochemical processes involved in the synergistic action of matrine and
L. muscarium
against
B. tabaci
. |
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Bibliography: | These authors contributed equally to this work. |
ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/srep46558 |