NDLI: Short-term anoxic conditioning hormesis boosts antioxidant defenses, lowers oxidative damage following irradiation and enhances male sexual performance in the Caribbean fruit fly, Anastrepha suspensa.

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Short-term anoxic conditioning hormesis boosts antioxidant defenses, lowers oxidative damage following irradiation and enhances male sexual performance in the Caribbean fruit fly, Anastrepha suspensa.

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Short-term anoxic conditioning hormesis boosts antioxidant defenses, lowers oxidative damage following irradiation and enhances male sexual performance in the Caribbean fruit fly, Anastrepha suspensa.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	López-Martínez, Giancarlo Hahn, Daniel A.
Description	Country affiliation: United States Author Affiliation: López-Martínez G ( Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA. gc.lopez@ufl.edu)
Abstract	Most organisms are repeatedly exposed to oxidative stress from multiple sources throughout their lifetimes, potentially affecting all aspects of organismal performance. Here we test whether exposure to a conditioning bout of anoxia early in adulthood induces a hormetic response that confers resistance to oxidative stress and enhances male sexual performance later in life in the Caribbean fruit fly, Anastrepha suspensa. Anoxic conditioning of adults prior to emergence led to an increase in antioxidant capacity driven by mitochondrial superoxide dismutase and glutathione peroxidase. When exposed to gamma irradiation, a strong oxidative stressor, males that received anoxic conditioning had lower lipid and protein oxidative damage at sexual maturity. Anoxia conditioning led to greater male sexual competitiveness compared with unconditioned males when both were irradiated, although there was no effect of anoxia conditioning on mating competitiveness in unirradiated males. Anoxia also led to higher adult emergence rates and greater flight ability in irradiation-stressed flies while preserving sterility. Thus, hormetic treatments that increased antioxidant enzyme activity also improved male performance after irradiation, suggesting that antioxidant enzymes play an important role in mediating the relationship between oxidative stress and sexual selection. Furthermore, our work has important applied implications for the sterile insect technique (SIT), an environmentally friendly method of insect pest control where males are sterilized by irradiation and deployed in the field to disrupt pest populations via mating. We suggest that hormetic treatments specifically designed to enhance antioxidant activity may produce more sexually competitive sterile males, thus improving the efficacy and economy of SIT programs.
File Format	HTM / HTML
ISSN	00220949
e-ISSN	14779145
Journal	Journal of Experimental Biology
Issue Number	Pt 12
Volume Number	215
Language	English
Publisher	The Company of Biologists
Publisher Date	2012-06-15
Publisher Place	Great Britain (UK)
Access Restriction	Open
Subject Keyword	Discipline Biology Anoxia Oxidative Stress Radiation Effects Sexual Behavior, Animal Tephritidae Physiology Animals Gamma Rays Glutathione Peroxidase Metabolism Oxygen Superoxide Dismutase Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s.
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Aquatic Science Molecular Biology Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Insect Science

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