Detoxication activity in the gypsy moth: Effects of host CO[sub 2] and NO[sub 3][sup [minus]] availability
- Univ. of Wisconsin, Madison (United States)
The authors investigated the effects of host species and resource (carbon dioxide, nitrate) availability on activity of detoxication enzymes in the gypsy moth, Lymantria dispar. Larvae were fed foliage from quaking aspen or sugar maple grown under ambient or elevated atmospheric CO[sub 2], with low or high soil NO[sub 3][sup [minus]] availability. Enzyme solutions were prepared from larval midguts and assayed for activity of cytochrome P-450 monooxygenase, esterase, glutathione transferase, and carbonyl reductase enzymes. Activity of each enzyme system was influenced by larval host species, CO[sub 2] or NO[sub 3][sup [minus]] availability, or an interaction of factors. Activity of all but glutathione transferases was highest in larvae reared on aspen. Elevated atmospheric CO[sub 2] promoted all but transferase activity in larvae reared on aspen, but had little if any impact on enzyme activities of larvae reared on maple. High NO[sub 3][sup [minus]] availability enhanced activity of most enzyme systems in gypsy moths fed high CO[sub 2] foliage, but the effect was less consistent for insects fed ambient CO[sub 2] foliage. This research shows that gypsy moths respond biochemically not only to interspecific differences in host chemistry, but also to resource-mediated, intraspecific changes in host chemistry. Such responses are likely to be important for the dynamics of plant-insect interactions as they occur now and as they will be altered by global atmospheric changes in the future. 33 refs., 4 figs.
- OSTI ID:
- 6880089
- Journal Information:
- Journal of Chemical Ecology; (United States), Journal Name: Journal of Chemical Ecology; (United States) Vol. 19:2; ISSN JCECD8; ISSN 0098-0331
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
560300 -- Chemicals Metabolism & Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
ARTHROPODS
BIOCHEMISTRY
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
CLIMATIC CHANGE
DETOXIFICATION
DRUGS
ENZYME ACTIVITY
ENZYMES
GLUTATHIONE
INSECTS
INVERTEBRATES
LARVAE
LEAVES
LEPIDOPTERA
LYMANTRIA DISPAR
MANAGEMENT
MOTHS
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEPTIDES
POLYPEPTIDES
PROTEINS
RADIOPROTECTIVE SUBSTANCES
RESOURCE MANAGEMENT
TRANSFERASES