Quantitative genetics of juvenile hormone esterase, juvenile hormone binding and general esterase activity in the cricket Gryllus assimilis

Gu, Xun; Zera, Anthony J.

doi:10.1038/hdy.1996.21

Cited by 26 publications

(31 citation statements)

References 21 publications

(17 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This study both corroborates and extends the results obtained in our previous quantitative-genetic analyses of JHE variation in juvenile G. assimilis (Zera & Zhang, 1995;Gu & Zera, 1996;. Three important points emerge from these studies of JHE variation in adults and juveniles.…”

Section: Discussionsupporting

confidence: 90%

“…The JHE heritability in adults also is only one-sixth that of the heritability for JH-binding activity in juvenile G. assimilis (Gu & Zera, 1996), the only other endocrine trait for which a heritability estimate is available, and is significantly lower than nearly all heritabilities of enzyme activities in Drosophila melanogaster (Clark, 1990). (16) *Day 3 of the last juvenile stadium (generation 10).…”

Section: Heritabilitiesmentioning

confidence: 99%

“…At issue are the nature and magnitude of genetic variation and covariation for hormonal features (hormone titres, hormone receptors, activities of enzymes that degrade or synthesize hormones) and the relationship between variation in hormonal and whole organism (life history) traits. Fundamental genetic parameters such as heritability and genetic correlation have been measured on only three endocrine traits in one insect species (Zera & Zhang, 1995;Gu & Zera, 1996;. Population-genetic data are available for only a few other cases of endocrine variation in insects (Wilson & Thurston, 1989;.…”

Section: Introductionmentioning

confidence: 99%

“…During the past few years we have been investigating the quantitative genetics of naturally occurring variation for the endocrine trait, juvenile hormone esterase (JHE) activity, in the cricket Gryllus assimilis (Zera & Zhang, 1995;Gu & Zera, 1996;. Our long-term goals are to identify the magnitude and nature of genetic variation and covariation for a 'typical' endocrine regulator.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Direct and correlated responses to selection on JHE activity in adult and juvenile Gryllus assimilis: implications for stage-specific evolution of insect endocrine traits

1998

Self Cite

View full text Add to dashboard Cite

Two-way selection on the activity of the endocrine regulator, juvenile hormone esterase (JHE), in adults of the cricket, Gryllus assimilis, resulted in a realized JHE heritability of 0.059<0.001. This heritability was significantly lower than the realized JHE heritability measured previously during selection on the last juvenile stadium (0.26<0.04). We observed strong correlated responses to selection on JHE activity during different periods of adulthood but very weak correlated responses in the last juvenile stadium. The additive genetic correlation between JHE activities in adults and juveniles, measured from the two pairs of correlated and direct responses obtained from the present adult and the previous juvenile selection studies, did not differ significantly from zero. Lines from the earlier juvenile selection study, reassayed for correlated responses after an additional five generations of selection, exhibited only weak correlated responses for JHE activity in adult and penultimate stages. Results from the present adult and the previous juvenile selection studies provide a consistent picture of strong withinstage JHE correlated responses in either adult or juvenile stages. By contrast, only weak JHE correlated responses occur in contiguous developmental stages, irrespective of whether the stages are physiologically or morphologically similar or dissimilar, or whether JHE activity was selected before or after the stage in which the correlated responses were measured. The regulation of a particular life cycle stage by JHE (juvenile development) can be modified by selection without necessarily altering its regulatory role in other stages (adult reproduction).

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Heritabilitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Direct and correlated responses to selection on JHE activity in adult and juvenile Gryllus assimilis: implications for stage-specific evolution of insect endocrine traits

1998

Self Cite

View full text Add to dashboard Cite

show abstract

“…Application of JH analogs was observed to induce histolysis of flight muscles based on color changes of muscles in the wing dimorphic cricket, Modicogryllus confirmatus (Tanaka, 1995). Genetic population analysis suggests that traits for control of expression of JHE and juvenile hormone binding proteins (JHBPs) are inter-related in the wing dimorphic cricket, G. assimilis (Gu and Zera, 1996). JHE activity is elevated in geographically isolated G. firmus populations that exhibit higher proportions of macropterous (flight capable) morphs (Roff and Fairbairn, 1999).…”

Section: Introductionmentioning

confidence: 99%

Programmed cell death in flight muscle histolysis of the house cricket

Oliver

Albury

Mousseau

2007

Journal of Insect Physiology

View full text Add to dashboard Cite

We have characterized the process of flight muscle histolysis in the female house cricket, Acheta domesticus, through analysis of alterations of tissue wet weight, total protein content, and percent shortening of the dorsal longitudinal flight muscles (DLMs). Our objectives were to (1) define the normal course of histolysis in the cricket, (2) analyze the effects of juvenile hormone (JH) removal and replacement, (3) determine the effects of cycloheximide treatment, and (4) examine patterns of protein expression during histolysis.Our results suggest that flight muscle histolysis in the house cricket is an example of an active, developmentally regulated cell death program induced by an endocrine signal. Initial declines of total protein in DLMs indicated the JH signal that induced histolysis occurred by Day 2 and that histolysis was essentially complete by Day 3. Significant reductions in tissue weight and percent muscle shortening were observed in DLMs from Day 3 crickets. Cervical ligation of Day 1 crickets prevented histolysis but this inhibition could be reversed by continual topical treatments with methoprene (an active JH analog) although ligation of Day 2 crickets did not prevent histolysis. A requirement for active protein expression was demonstrated by analysis of synthesis block by cycloheximide and short-term incorporation of 35 S-methionine. Treatment with cycloheximide prevented histolysis. Autofluorographic imaging of DLM proteins separated by electrophoresis revealed apparent coordinated regulation of protein expression.

show abstract

Artificial selection on JHE activity inGryllus assimilis: Nature of activity differences between lines and effect on JH binding and metabolism

Zera

Sall

Schwartz

1996

Arch. Insect Biochem. Physiol.

View full text Add to dashboard Cite

Genetic lines of the cricket Gryllus assimilis selected for elevated vs. decreased activity of hemolymph juvenile hormone esterase (JHE) exhibited a 6.8‐fold difference in enzyme activity by the seventh generation of selection. This documents that hemolymph JHE activity has the capability for rapid evolutionary change. This is the only insect endocrine trait for which such data are currently available. The difference in hemolymph JHE activity between the lines was due, to an equivalent degree, to variation in whole‐cricket enzyme activity and allocation of JHE activity to the hemolymph compartment. No differences in kinetic or thermostability characteristics were observed between JHEs from the high‐ vs. low‐selected lines. This suggests that the variation in JHE activity between the lines resulted from selection of variable regulatory genetic factors affecting the synthesis, degradation, or activation of enzyme activity. JHE and JH‐binding activity in the hemolymph are genetically correlated, possibly due to co‐regulation by the same genetic factors. Finally, in vivo JH degradation was significantly elevated in lines selected for elevated JHE activity. This documents that evolutionary changes in JHE activity alter in vivo JH metabolism. © 1996 Wiley‐Liss, Inc.

show abstract

Quantitative genetics of juvenile hormone esterase, juvenile hormone binding and general esterase activity in the cricket Gryllus assimilis

Cited by 26 publications

References 21 publications

Direct and correlated responses to selection on JHE activity in adult and juvenile Gryllus assimilis: implications for stage-specific evolution of insect endocrine traits

Direct and correlated responses to selection on JHE activity in adult and juvenile Gryllus assimilis: implications for stage-specific evolution of insect endocrine traits

Programmed cell death in flight muscle histolysis of the house cricket

Artificial selection on JHE activity inGryllus assimilis: Nature of activity differences between lines and effect on JH binding and metabolism

Contact Info

Product

Resources

About