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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

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 steriity. 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  More>>
Authors:
Lopez-Martinez, Giancarlo; Hahn, Daniel A [1] 
  1. Department of Entomology and Nematology, University of Florida, Gainesville, FL (United States)
Publication Date:
Jan 15, 2013
Product Type:
Miscellaneous
Report Number:
INIS-XA-13R0012
Resource Relation:
Other Information: The full paper was published in: The Journal of Experimental Biology (2012) 215: 2150-216; Related Information: In: Insect Pest Control Newsletter, No. 80, January 2013| 44 p.
Subject:
60 APPLIED LIFE SCIENCES; ANASTREPHA; ANOXIA; ANTIOXIDANTS; BIOLOGICAL ADAPTATION; DAMAGE; ENZYME ACTIVITY; GAMMA RADIATION; GLUTATHIONE; MATING; MITOCHONDRIA; OXIDATION; PERFORMANCE; PEROXIDASES; PEST CONTROL; RADIOSTERILIZATION; STERILE MALE TECHNIQUE; STRESSES; SUPEROXIDE DISMUTASE
OSTI ID:
22072854
Research Organizations:
Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna (Austria); FAO/IAEA Agriculture and Biotechnology Laboratory, Seibersdorf (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 1011-274X; TRN: XA13R0017032595
Availability:
Available from INIS in electronic form. Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/Newsletters/IPC-NL-80.pdf; Web sites: http://www-naweb.iaea.org/nafa/ipc/index.html; http://www.fao.org/ag/portal/age-index.html
Submitting Site:
INIS
Size:
page(s) 34
Announcement Date:
Mar 14, 2013

Citation Formats

Lopez-Martinez, Giancarlo, and Hahn, Daniel A. 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. IAEA: N. p., 2013. Web.
Lopez-Martinez, Giancarlo, & Hahn, Daniel A. 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. IAEA.
Lopez-Martinez, Giancarlo, and Hahn, Daniel A. 2013. "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." IAEA.
@misc{etde_22072854,
title = {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}
author = {Lopez-Martinez, Giancarlo, and Hahn, Daniel A}
abstractNote = {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 steriity. 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. (author)}
place = {IAEA}
year = {2013}
month = {Jan}
}