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Plant Physiology 44:903-906 (1969) © 1969 American Society of Plant Biologists Abscission of Cotton Flower Buds and Petioles Caused by Protein From Boll Weevil Larvaea Crops Research Division, Agricultural Research Service, United States Department of Agriculture, State College, Mississippi 39762 Protein extracted from boll weevil larvae causes abscission of cotton flower buds and debladed petioles. Abscission of buds is preceded by a rapid and persistent flaring of bracts; cell proliferation is induced in the abscission zone of debladed petioles. A possible mode of transmission of the agent from larva to bud tissue is discussed.
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