Xenobiotic metabolism of plant secondary compounds in the English grain aphid, Sitobion avenae (F.) (Hemiptera: Aphididae)

Maoxin Zhang, Tingting Fang, Guilin Pu, Xiaoqin Sun, Xuguo Zhou, Qingnian Cai

Research output: Contribution to journalArticlepeer-review

Abstract

Plant secondary compounds have been documented to be deleterious to insects and other herbivores in diverse ways. In this study, the effect of catechol (phenolics), gramine (alkaloid) and L-ornithine-HCI (non-protein amino acid) on the activities of xenobiotic metabolizing enzymes in English grain aphid, Sitobion avenae, was evaluated. Phase I enzymes investigated in this study included carboxylesterase (CarE), and oxidoreductase, whereas Phase II enzymes were represented by glutathione S-transferase (GST). In general, CarE and GST activities in S. avenae were positively correlated with the concentration of plant secondary compounds in artificial diets. Oxidoreductase activity, however, displayed a different profile. Specifically, peroxidase (POD) and polyphenol oxidase (PPO) activities in S. avenae were positively correlated with concentrations of dietary catechol and gramine, respectively, whereas catalase (CAT) activity was significantly suppressed by the higher concentration of catechol, gramine and L-ornithine-HCl. These combined results suggest that CarE and GST in S. avenae are key enzymes to breakdown a broad spectrum of plant secondary compounds, whereas oxidoreductase, including PPO and POD, degrades specific groups of plant secondary compounds.

Original languageEnglish (US)
Pages (from-to)44-49
Number of pages6
JournalPesticide Biochemistry and Physiology
Volume107
Issue number1
DOIs
StatePublished - Sep 2013
Externally publishedYes

Keywords

  • Phase I and II detoxification enzymes
  • Plant defense
  • Secondary plant compounds
  • Sitobion avenae
  • Xenobiotic metabolism

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Health, Toxicology and Mutagenesis

Fingerprint

Dive into the research topics of 'Xenobiotic metabolism of plant secondary compounds in the English grain aphid, Sitobion avenae (F.) (Hemiptera: Aphididae)'. Together they form a unique fingerprint.

Cite this