Developmental Role of Juvenile Hormone Metabolism in Lepidoptera

Roe, R. Michael; Jesudason, Princy; Venkatesh, Krishnappa; Kallapur, V. L.; Anspaugh, Douglas D.; Majumder, Chandana; Linderman, Russell J.; Graves, David M.

doi:10.1093/icb/33.3.375

Cited by 24 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spinosyn exposure has also been observed to cause hormonal abnormalities. 58,73,74 In our study, an increase in genes that encode juvenile hormone esterase (JHE) (LOC1113498447, LOC113492812, LOC113504904, LOC113505877, LOC113505925, LOC113505295, LOC113492819), an enzyme involved in JH degradation and, thus, in regulating insect development from embryogenesis to metamorphosis, [75][76][77][78] is observed in response to egg treatment by HS (Supporting Information, Table S2). LOC11349847 expression is increased in both 1st and 3rd instar caterpillars that emerged from eggs treated with HS (Fig.…”

Section: Effects Of Sublethal Concentration Of Spinosyn (Spinosyn a A...mentioning

confidence: 98%

Effect of sublethal concentrations of the bioinsecticide spinosyn treatment of Trichoplusia ni eggs on the caterpillar and its parasitoid, Trichogramma brassicae

Smith,

Chen,

Lafleur

et al. 2024

Pest Management Science

View full text Add to dashboard Cite

BACKGROUNDIntegrated Pest Management (IPM) seeks to combine multiple management strategies for optimal pest control. One method that is successfully employed in IPM is the use of beneficial organisms. However, in severe circumstances when pest insects exceed threshold limits, insecticides may still need to be implemented. Thus, understanding the effects of insecticides on biocontrol agents, such as parasitoid wasps, is paramount to ensure sustainable agroecosystems. Sublethal effects of the bioinsecticide spinosyn, a mixture of the bacterial Saccharopolyspora spinosa (Mertz and Yao) fermentation products spinosyn A and D, on eggs of Trichoplusia ni (Hübner), a cruciferous crop pest, and its egg parasitoid Trichogramma brassicae (Bezdenko) was investigated.RESULTSThe LC50 for spinosyn A and D (dissolved in ethanol) on T. ni eggs is 54 ng/mL. Transcriptomics on caterpillars (1st and 3rd instars) that hatched from eggs treated with sublethal concentrations of spinosyn identified the upregulation of several genes encoding proteins that may be involved in insecticide resistance including detoxification enzymes, such as cytochrome P450s, glutathione S‐transferases and esterases. Sublethal T. ni egg treatments did not affect parasitoid emergence, however, there was a marked increase in the size of T. brassicae hind tibia and wings that emerged from spinosyn‐treated eggs.CONCLUSIONSFor the caterpillar, treatment of eggs with sublethal concentrations of spinosyn may induce insecticide resistance mechanisms. For the parasitoids, their increased size when reared in spinosyn‐treated eggs suggests that the emerged wasps may have a higher performance.This article is protected by copyright. All rights reserved.

show abstract

Section: Effects Of Sublethal Concentration Of Spinosyn (Spinosyn a A...mentioning

confidence: 98%

Effect of sublethal concentrations of the bioinsecticide spinosyn treatment of Trichoplusia ni eggs on the caterpillar and its parasitoid, Trichogramma brassicae

Smith,

Chen,

Lafleur

et al. 2024

Pest Management Science

View full text Add to dashboard Cite

show abstract

Mechanism of action and cloning of epoxide hydrolase from the cabbage looper,Trichoplusia ni

Roe

Kallapur

Linderman

et al. 1996

Arch. Insect Biochem. Physiol.

Self Cite

View full text Add to dashboard Cite

The majority of the JH III epoxide hydrolase activity in last stadium day 3 (gate 1) wandering Trichoplusia ni was membrane bound with approximately 9% of the activity found in the cytosol. Both the microsomal and cytosolic JH epoxide hydrolases were stable, retaining 30% of their original activity after incubation at 4°C for 15 days. 18O‐labeled water underwent enzyme catalyzed regioselective addition to the least substituted C10 position of JH III. In multiple turnover reactions with JH epoxide hydrolase in 97.9% 18O‐labeled water, only 91.3% 18O incorporation was observed. This is consistent with an SN2 reaction likely involving a carboxylate in the active site of JH epoxide hydrolase. The DNA amplification cloning of a fragment of a putative T. ni epoxide hydrolase is reported. The deduced amino acid sequence shares 67% similarity to the rat microsomal epoxide hydrolase. © 1996 Wiley‐Liss, Inc.

show abstract

Apparent inhibition of in vitro juvenile hormone biosynthesis by the corpus cardiacum of adult crickets (Gryllus bimaculatus andAcheta domesticus) is due to juvenile hormone esterase

Woodring

Hoffmann

1997

Arch. Insect Biochem. Physiol.

View full text Add to dashboard Cite

Developmental Role of Juvenile Hormone Metabolism in Lepidoptera

Cited by 24 publications

References 27 publications

Effect of sublethal concentrations of the bioinsecticide spinosyn treatment of Trichoplusia ni eggs on the caterpillar and its parasitoid, Trichogramma brassicae

Effect of sublethal concentrations of the bioinsecticide spinosyn treatment of Trichoplusia ni eggs on the caterpillar and its parasitoid, Trichogramma brassicae

Mechanism of action and cloning of epoxide hydrolase from the cabbage looper,Trichoplusia ni

Apparent inhibition of in vitro juvenile hormone biosynthesis by the corpus cardiacum of adult crickets (Gryllus bimaculatus andAcheta domesticus) is due to juvenile hormone esterase

Contact Info

Product

Resources

About