Antinutritive, tomato plant

En matic Antinutritive Defenses of the Tomato Plant Against Insects... 

These enzymes (e.g., lipoxygenases, polyphenol oxidases, peroxidases) also occur in the tomato plant and are locally and/or systemically inducible, as a result of infection by pathogens (49,53,55,58-62). It should follow that they are also inducible by insect-feeding damage such as that inflicted by H. zea or S. exigua. and amplify the antinutritive defense. 

Mechanisms of Plant Resistance to Insects, the second section, focuses on the role of trichomes in resistance to potatoes and tomatoes, enzymatic antinutritive defenses of tomatoes, and the roles of phytoalexins in insect control. 

Non-toxic lectins are lectins of garlic, onions, leeks, tomatoes and amaranth. Of the common lectins, those of peanuts, lentils, peas, common beans and soya beans are slightly toxic, wheat lectins are moderately toxic, and lectins of some beans (such as Jack beans) are highly toxic, while castor seed lectins are lethal (Table 10.21). Some lectins (such as lectins of garlic) have prebiotic effects and inhibit undesirable intestinal microflora Escherichia coli). Often, lectins are not the only toxic substances of the plant material. For example, lectins of soybean seeds participate in their antinutritional and toxic effects at a level of about 25%, but trypsin inhibitors are about 40% and the rest is covered by saponins and other substances. 

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