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Heat stress affects oogenesis differently in wild‐type Drosophila virilis and a mutant with altered juvenile hormone and 20‐hydroxyecdysone levels
Author(s) -
Gruntenko N. E.,
Bownes M.,
Terashima J.,
Sukhanova M. Zh.,
Raushenbach I. Yu
Publication year - 2003
Publication title -
insect molecular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.955
H-Index - 93
eISSN - 1365-2583
pISSN - 0962-1075
DOI - 10.1046/j.1365-2583.2003.00424.x
Subject(s) - biology , juvenile hormone , vitellogenesis , drosophila virilis , oocyte , 20 hydroxyecdysone , oogenesis , mutant , yolk , microbiology and biotechnology , medicine , endocrinology , wild type , hsp70 , hormone , drosophila melanogaster , genetics , heat shock protein , gene , embryo , ecology
Abstract The link between reproduction and environmental signals is poorly understood at the physiological, genetic and molecular levels. We describe a mutant strain of Drosophila virilis that has altered responses to heat stress. Heat stress in wild‐type females results in oocyte maturation delays, degradation of early vitellogenic egg chambers, inhibition of yolk protein gene expression in follicle cells and accumulation of mature oocytes. The mutant females have increased levels of ecdysteroids and decreased juvenile hormone degradation, and show all of the heat‐stress‐induced reproductive effects observed in wild‐type flies, without exposure to heat stress. During oogenesis in mutant females following heat stress there is an increase in early vitellogenic oocyte degradation and some degradation of late egg chambers. 20‐Hydroxyecdysone levels, but not juvenile hormone degradation, change following heat stress in mutant females.