PMID: 16628930Apr 25, 2006Paper

Effect of plant a-amylase inhibitors on sunn pest, Eurygaster integriceps Puton (Hemiptera: Scutelleridae), alpha-amylase activity

Communications in Agricultural and Applied Biological Sciences
A R Bandani

Abstract

Plant-insect interaction is a dynamic system, subjected to continual variation and change. In order to reduce insect attack, plants developed different defence mechanisms including chemical and physical barriers such as the induction of defensive proteins, volatiles that attract predators of the insect herbivores and secondary metabolites. Proteinaceous inhibitors of alpha-amylase and proteases are widely distributed in cereals, legumes and some other plants. Because of the possible importance of these inhibitors in plant physiology and animal nutrition, extensive research has been conducted on their properties and biological effects. Sunn pest like other insect pests of wheat lives on a polysaccharide-rich diet and depends to a large extent on effectiveness of their alpha-amylases for survival, a-amylase (1-4-alpha-D-glucan glucanohydrolase) hydrolyses starch, and related polysaccharides by randomly cleaving internal alpha-1,4-glucosidic linkages and has a major role in the utilization of polysaccharides. The enzyme inhibitors act on key insect gut digestive hydrolyses, alpha-amylase. Several kinds of a-amylase inhibitors present in seeds and vegetative organs of plant, act to regulate number of phytophagous insects. Therefore...Continue Reading

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