Chemical basis of host-plant resistance to aphids |
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| Authors: | D. L. DREYER B. C. CAMPBELL |
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| Affiliation: | U.S. Department of Agriculture, Albany, California, U.S.A. |
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| Abstract: | Abstract The importance of host-plant resistance of crop plants in the biological control of aphids and the formation of aphid biotypes is discussed. The rapid response of plant breeders to the formation of new aphid biotypes requires detailed knowledge on the mechanism of host-plant resistance. Current knowledge on the chemical basis of host-plant resistance to aphids is summarized. Of central importance to this relationship is the aphid-pectinase plant-pectin interdependence. Parallels between the mechanism of aphid-plant and pathogen-plant attack are pointed out and how aphid bacterial endo-symbiotes play a central role in host-plant selection. |
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| Keywords: | biotypes pectin pectinase symbiotes phloem compartmentalization callose feeding deterrents alkaloids |
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