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Mechanisms of Life History EvolutionThe Genetics and Physiology of Life History Traits and Trade-Offs$
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Thomas Flatt and Andreas Heyland

Print publication date: 2011

Print ISBN-13: 9780199568765

Published to Oxford Scholarship Online: December 2013

DOI: 10.1093/acprof:oso/9780199568765.001.0001

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Parallels in understanding the endocrine control of lifespan with the firebug Pyrrhocoris apterus and the fruit fly Drosophila melanogaster

Parallels in understanding the endocrine control of lifespan with the firebug Pyrrhocoris apterus and the fruit fly Drosophila melanogaster

Chapter:
(p.171) Chapter 13 Parallels in understanding the endocrine control of lifespan with the firebug Pyrrhocoris apterus and the fruit fly Drosophila melanogaster
Source:
Mechanisms of Life History Evolution
Author(s):

Magdalena Hodkova

Marc Tatar

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199568765.003.0013

In many organisms, reproduction is negatively correlated with life span, but little is known about proximate mechanisms of this trade-off. According to the traditional view, internal energy reserves are limited, thus giving rise to the trade-off of their use. More recently, this idea was challenged by the observation that survival and reproduction can be experimentally decoupled. Pleiotropic effects of endocrine signals are currently considered to play a key role in the modulation of life history trade-offs, but the way these signals connect reproduction (or other fitness traits) and longevity still remains elusive. An extensive body of work has shown that mutations in many genes in insulin-like signalling pathways prolong the life span of Drosophila melanogaster. JH is a major developmental and reproductive hormone affecting a remarkable number of physiological processes, and is therefore considered a key mediator of life history trade-offs. This chapter focuses on the role of gonad in the regulation of life span by JH. It discusses other interactions potentially involved in the trade-off between reproduction and life span, namely those among JH, insulin-like peptides, germ line stem cells, and fat body.

Keywords:   reproductive diapause, dormancy, reproduction, life history trade-offs, juvenile hormone, insulin-like signaling, corpora allata, pars intercerebralis, gonad, stem cells

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