Tryptophan Decarboxylase,Tryptamine, and Reproduction of the Whitefly |
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| Authors: | Thomas J. C. Adams D. G. Nessler C. L. Brown J. K. Bohnert H. J. |
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| Affiliation: | Department of Biochemistry (J.C.T., D.G.A., H.J.B.) and Department of Plant Sciences (J.K.B., H.J.B.), University of Arizona, Tucson, Arizona 85721. |
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| Abstract: | Tryptophan decarboxylase (TDC) from Catharanthus roseus (periwinkle) converts tryptophan to the indole-alkaloid tryptamine. When the TDC gene was expressed in transgenic tobacco, the 55-kD TDC enzyme and tryptamine accumulated. Bemisia tabaci (sweetpotato whitefly) reproduction on transgenic plants decreased up to 97% relative to controls. Production of tryptamine, its derivatives, or other products resulting from TDC activity may discourage whitefly reproduction and provide a single-gene-based plant protection strategy. |
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