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Titolo:
Effect of two wheat cultivars differing in hydroxamic acid concentration on detoxification metabolism in the aphid Sitobion avenae
Autore:
Loayza-Muro, R; Figueroa, CC; Niemeyer, HM;
Indirizzi:
Univ Chile, Fac Ciencias, Dept Ciencias Ecol, Santiago, Chile Univ Chile Santiago Chile Ciencias, Dept Ciencias Ecol, Santiago, Chile
Titolo Testata:
JOURNAL OF CHEMICAL ECOLOGY
fascicolo: 12, volume: 26, anno: 2000,
pagine: 2725 - 2736
SICI:
0098-0331(200012)26:12<2725:EOTWCD>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
GLUTATHIONE S-TRANSFERASES; CEREAL APHIDS; HOST PLANT; RESISTANCE; DIMBOA; ALLELOCHEMICALS; GRAMINEAE; PEROXISOMES; HERBIVORE; INSECT;
Keywords:
Sitobion avenae; aphids; hydroxamic acids; DIMBOA; detoxification; cytochrome P-450 monooxygenases; NADPH cytochrome c reductase; glutathione S-transferases; esterases; catalase;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Niemeyer, HM Univ Chile, Fac Ciencias, Dept Ciencias Ecol, Casilla 653, Santiago, Chile Univ Chile Casilla 653 Santiago Chile 653, Santiago, Chile
Citazione:
R. Loayza-Muro et al., "Effect of two wheat cultivars differing in hydroxamic acid concentration on detoxification metabolism in the aphid Sitobion avenae", J CHEM ECOL, 26(12), 2000, pp. 2725-2736

Abstract

Hydroxamic acids (Hx) are wheat secondary metabolites conferring resistance for cereals against aphids. The activity of five enzymatic systems were evaluated in the aphid Sitobion avenae reared on the high-Hx wheat cultivar Chagual and the low-Hx wheat cultivar Huayun for 10 generations. Enzyme solutions were prepared from aphid homogenates and assayed for mixed function oxidases (including cytochrome P-450 monooxygenases and NADPH cytochrome c reductase), glutathione S-transferases, esterases, and catalase. Specific activities per aphid individual of cytochrome P-450 monooxygenases, NADPH cytochrome c reductase, glutathione S-transferases. and esterases were significantly increased in wheat cultivars relative to oat (only marginal increase of esterases in Chagual). Aphids fed on cv. Huayun showed an overall higher induction of enzymatic systems than those fed on cv. Chagual. Comparisonof these results with reported effects of Hx on detoxifying enzymes in other insects, including aphids, support the hypothesis that these enzymatic pathways play an important role in the detoxification of toxic host-plant secondary metabolites.

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Documento generato il 29/09/20 alle ore 20:35:03