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GrainGenes Reference Report: JFC-49-2249

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Reference
JFC-49-2249
Title
Induction of soluble and cell wall peroxidases by aphid infestation in barley
Journal
Journal of Agricultural and Food Chemistry
Year
2001
Volume
49
Pages
2249-2253
Author
Chaman ME
Corcuera LJ
Zuniga GE
Cardemil L
Argandona VH
Abstract
Summary: Peroxidase enzymes have been found in soluble, ionically bound, and covalently bound forms and have been implicated in several physiological processes in plants. This paper investigates the effect of aphid infestation on soluble and bound-cell wall peroxidase activity and bound-cell wall isoform changes of barley plants. Peroxidase activity was measured in control plants and plants infested with the aphid Schizaphis graminum (Rondani). The activity of soluble peroxidases increased with time of infestation, older plants being more affected than younger ones. The increase in bound-cell wall peroxidase activity as a function of age was higher in infested than in control plants, being higher in ionically bound than in covalently bound peroxidases. When the aphids were removed from plants, the activities of both types of peroxidases decreased to control levels. Isoelectrofocusing analyses of the ionically bound peroxidases showed changes in the isoform pattern. A new isoform was induced by infestation. The activities of all covalently bound isoforms increased after infestation. The physiological implications of these changes are discussed
Keyword
age
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