Abstract:
:The long-term effects of X-irradiation with 0.25, 0.5, 0.75 and 1 Gy of 1 h eggs on the fitness-related life history traits in adult Drosophila melanogaster fruit flies and their offspring were investigated. Following irradiation with 0.25, 0.5 and 0.75 Gy, both F0 and F1 flies have decreased adult body weight and increased locomotor (photo- and geotactic) activity, whereas metabolic rate measured as the rate of CO2 production was unchanged or even increased, and female fecundity was slightly reduced compared to appropriate controls. In some cases, irradiation resulted in hormetic effects increased resistance to both starvation and heat shock stresses as well as life extension. An explanation of the beneficial long lasting effects induced by early irradiation is offered, which suggests that these effects are due to cross-life stage and cross-generational adaptive phenotypic plasticity.
journal_name
Biogerontologyjournal_title
Biogerontologyauthors
Vaiserman AM,Koshel NM,Mechova LV,Voitenko VPdoi
10.1007/s10522-004-2571-2keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
327-37issue
5eissn
1389-5729issn
1573-6768pii
5382571journal_volume
5pub_type
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