Organization, Structure and Activation of Plant Defence Genes
Plants exhibit natural resistance to disease which has been exploited by breeders to reduce crop losses and hence increase yield. Disease resistance involves not only static protection, but also inducible defence mechanisms including: (i) accumulation of host-synthesized phytoalexins; (ii) deposition of lignin-like material; (iii) accumulation of hydroxyproline-rich glycoproteins and (iv) increases in the activity of certain hydrolytic enzymes such as chitinase and glucanase . Although the genetics, physiology and cytology of plant:pathogen interactions have been extensively studied, until recently relatively little was known at the biochemical level about how plants respond to infection to activate these defence responses.
KeywordsLignin Chitosan Polypeptide Flavonoid Chitin
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