Hypersensitive response of wheat to the Hessian fly |
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Authors: | Paul B Grover Jr |
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Institution: | (1) Department of Entomology, Purdue University, 47907-1158 West Lafayette, IN, USA;(2) Present address: 209 E. Lutz, 47906 West Lafayette, IN, USA |
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Abstract: | Hessian flyMayetiola destructor (Say) larvae are able to obtain food from their host plant without inflicting mechanical damage to the plant surface, apparently
by secreting substances which elicit release of nutrients from plant cells surrounding the feeding site. Cells of fully susceptible
plants retain their normal appearances, while in resistant plants extensive areas of cellular collapse occur. These responses
indicate that hypersensitivity is the basis of wheat's resistance to the Hessian fly. The fly's feeding mechanism more closely
resembles that of a pathogen than of a phytophagous insect; correspondingly, both the genetic relationship and resistance
mechanism of the host plant to the parasite are of the sorts commonly associated with bacterial and fungal pathogens. |
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Keywords: | hypersensitivity Hessian fly plant resistance wheat |
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