Tissue esterases ofExoristina sorbillans (Uzi fly)

Krishna, G. V. R.; Govardhan, L.; Veerabhadrappa, Patnagere S.

doi:10.1007/bf02716738

Cited by 1 publication

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These enzymes are ubiquitous in nature but their exact physiological significance is not known. Recent studies on esterases from several species implicate them to be involved in the regulation of juvenile hormone titer in the hemolymph, insecticidal resistance, fat mobilization and metabolism, nerve transmission, production of ootheca and vitellogenin, and lysis of yolk cells in the eggs of silk worm (Krishna et al. 1984).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Heteroptera and more particularly bug species are poorly studied even though many species are economically important and cause problems partially due to insecticide resistance. Meanwhile, so far no work has been done on the esterases of the bugs; the present investigation deals with the characterization of the tissue esterases in order to understand their possible roles (Krishna et al 1984). Hence, the aim of this work was to partially characterize the GSTs and general esterases of both these herbivores to show their ability for detoxifying of plant allelochemicals and their reaction to chemical spraying.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of glutathione S‐transferase and general esterase in two bugs, Eurygaster integriceps Puton (Heteroptera: Scutelleridae) and Brachynema germari Kolenati (Heteroptera: Pentatomidae)

Ramzi

Bandani

Zibaee

et al. 2009

Entomological Research

View full text Add to dashboard Cite

Glutathione S‐transferases (GSTs) and general esterases play important roles in the detoxification of many substances including allelochemicals from plants and chemical pesticides. In this study, to determine the feeding status and effects of agronomical practices on GST and general esterase, two bug species, Eurygaster integriceps and Brachynema germari, were selected with differences in these cases. GST and general esterase responses varied when switching from 1‐chloro‐2,4‐dinitrobenzene (CDNB) and α‐naphtyl to 1,2‐dichloro‐4‐nitro‐benzene (DCNB) and β‐naphtyl in E. integriceps and B. germari, respectively. The activities of GST and esterase by using CDNB and α‐naphtyl were higher than that of DCNB and β‐naphtyl for both insects. It was shown that the optimal pH for GST and general esterase activity varied between pH 5.5 and 6. While the Michaelis constant (Km) value related to E. integriceps toward CDNB and α‐naphtyl was lower than Km for B. germari, Km values calculated for E. integriceps toward DCNB and β‐naphtyl corresponding to those related to A. hejeri were similar to CDNB and α‐naphtyl values. The maximal reaction velocity (Vmax) values related to E. integriceps for both substrates (CDNB and α‐naphtyl) were always higher than those from B. germari and showed significant differences. At the basement of the native‐PAGE electrophoresis, five bands were observed in for GST and three were visualized for B. germari, with a large, darker band for E. integriceps in the case of esterases. Studies on the detoxification enzymes of herbivores should be undertaken to determine accurately the effect of the host plants on the organisms eating them, particularly in terms of biochemical and ecological advantages.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation