Submitted to: International Congress of Pesticide Chemistry Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/7/1998
Publication Date: N/A
Technical Abstract: Peroxidases are oxidative enzymes capable of directly or indirectly producing acutely toxic reactive compounds from secondary metabolites which may also generate additional reactive oxygen species, covalently tie up nutrients, inhibit digestive or other enzymes, or polymerize and crosslink to increase plant tissue toughness. When expressed at levels that increased net peroxidase activity to at least 5-10X total wild type peroxidase activity, tobacco anionic peroxidase differentially increased resistance to insect feeding in different tobacco species, tomato, and sweetgum. Size and species of insect; age, species, and plant part of plants (and their associated primary and secondary chemistry) all appear to interact with different peroxidase isozymes. The complexity of these interactions make it very difficult to predict a net result, although effects of transformation of peroxidases into closely related species will likely be more predictable than when peroxidase genes are introduced into distantly related plants.