Heat-induced longevity extension in Drosophila. I. Heat treatment, mortality, and thermotolerance.
Survival data were collected on a total of 28,000 Drosophila melanogaster adults in order to investigate mortality patterns and induced physiological responses after a mild thermal stress. A brief, nonlethal heat treatment extends adult life span at normal temperatures by an average of 2 days (64), compared to nontreated controls of the same genotypes. Life expectancy is extended as a demographic consequence of reduced age-specific mortality over a period of up to several weeks after the heat treatment. Heat treatment also increases tolerance to subsequent, more severe thermal stress. Observations on single-sex populations suggest that heat-induced longevity extension is independent of the suppression of reproductive activity.
Khazaeli
A A
AA
Department of Ecology, Evolution, and Behavior, University of Minnesota, USA.
Tatar
M
M
Pletcher
S D
SD
Curtsinger
J W
JW
D000064:Acclimatization; D000818:Animals; D004331:Drosophila melanogaster / Q000502:physiology*; D006358:Hot Temperature; D008136:Longevity; D009026:Mortality; D012016:Reference Values; D013312:Stress, Physiological / Q000209:etiology / Q000503:physiopathology