Journal ArticleDOI
Resistance to thermal stress in preadult Drosophila buzzatii: variation among populations and changes in relative resistance across life stages
Robert A. Krebs,Volker Loeschcke +1 more
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TLDR
Comparison of populations that were more similar in their pattern of change in resistance across development suggested a relationship with the climate of origin, and the possibility that developmental variation in the expression of heat shock proteins may cause variation in resistance to thermal stress for different life stages is discussed.Abstract:
Resistance to a short term exposure to a high temperature stress was examined in eggs, larvae and pupae of Drosophila buzzfltii from seven localities. Across development, pupae were most resistant, followed by eggs, and then first and third-instar larvae. Variation among populations for resistance to heat stress was significant in all life stages. However, there was much less variation among populations where measured as eggs and pupae than for both first and third instar larvae. Older larvae showed large changes both in viability and developmental time, while exposure of young larvae to heat stress led to a decline in viability without delayed development. Populations that had the shortest developmental time at 25oC were relatively the most resistant to heat stress as larvae. High relative resistance at one preadult life stage was not necessarily associated with relatively high resistance at another, or with previous measurements of resistance for adults from these populations. Comparison of populations that were more similar in their pattern of change in resistance across development suggested a relationship with the climate of origin. The possibility that developmental variation in the expression of heat shock proteins may cause variation in resistance to thermal stress for different life stages is discussed.read more
Citations
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Journal ArticleDOI
The evolutionary and ecological role of heat shock proteins
TL;DR: It is suggested that the expression level of Hsp in each species and population is a balance between benefits and costs, i.e. a negative impact on growth, development rate and fertility as a result of overexpression of Hsps.
Journal ArticleDOI
Adaptation of Drosophila to temperature extremes: bringing together quantitative and molecular approaches
TL;DR: The way the Drosophila research has been used to understand the evolution of plastic responses, tradeoffs and limits to selection, and to develop links between laboratory studies and adaptive shifts leading to population and species differences is examined.
Journal ArticleDOI
Insect thermal tolerance: what is the role of ontogeny, ageing and senescence?
Ken Bowler,John S. Terblanche +1 more
TL;DR: It is argued that basal thermal tolerance and acclimation responses (i.e. phenotypic plasticity) are strongly influenced by age and/or ontogeny and may confound studies of temperature responses if unaccounted for and that the temperature tolerance of insects should be defined within the age‐demographics of a particular population or species.
Journal ArticleDOI
Review: Thermal preference in Drosophila.
TL;DR: What is known about Drosophila thermal preference is reviewed to provide the opportunity to connect genes to neuromolecular mechanisms to behavior to fitness in the wild.
Journal ArticleDOI
Natural variation in the expression of the heat-shock protein hsp70 in a population of drosophila melanogaster and its correlation with tolerance of ecologically relevant thermal stress
Robert A. Krebs,Martin E. Feder +1 more
TL;DR: Conditional performance in first‐instar larvae of 20 isofemale lines isolated from a single natural population of D. melanogaster suggests an evolutionary trade‐off between thermotolerance and the ability to produce higher concentrations of Hsp70, and survival in a benign environment.
References
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Journal ArticleDOI
The heat-shock response
TL;DR: A comparison of different Organisms and Stages of Development and Heat-Induced Lethality and Thermotolerance and the role of RNA Processing are presented.
Journal ArticleDOI
A new puffing pattern induced by temperature shock and DNP in drosophila
TL;DR: In this article, shocks di temperatura possono indurre una variazione di "puffing pattern" in ghiandole salivari di Drosophila, which is perfettamente reversibili and rappresentano zone di intensa sintesi di RNA.
Book
The Biology of heat shock proteins and molecular chaperones.
TL;DR: McClintock et al. as mentioned in this paper described the role of heat shock proteins as proteases or unfolded polypeptide-binding proteins in the regulation of the heat shock response in eukaryotic organisms.
Book
Evolutionary Genetics and Environmental Stress
Ary A. Hoffmann,Peter A. Parsons +1 more
TL;DR: The evolutionary and ecological importance of environmental stress stress and protein variation genetic variation in stress response effects of stress on genetic variation general stress resistance stress response, costs and trade-offs stress, species margins and conservation are studied.
Journal ArticleDOI
Protein synthesis in salivary glands of Drosophila melanogaster: relation to chromosome puffs.
TL;DR: The salivary glands and other tissues from Drosophila melanogaster were dissected at various times throughout the prepupal period, as well as after heat shocks and ecdysterone treatments, and the proteins labelled by incubating the isolated tissues with [35S]methionine were separated by electrophoresis on sodium dodecyl sulphate-polyacrylamide gel.
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