Plant Physiol.
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Plant Physiology 55:265-269 (1975)
© 1975 American Society of Plant Biologists

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Ethylene and the Annona Flower 1

Amos Blumenfeld

a Department of Subtropical Horticulture, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel

The annona (Annona hybrida) flower is protogynous, and reaches its male stage about 26 hours after the beginning of the female stage. A rise in ethylene production was found to precede the male stage. Much more ethylene was produced by the reproductive organs than by the petals, with the anthers producing most of the ethylene. Ethylene treatments advanced the male stage, but not the female stage. Exposing flowers to hypobaric pressure postponed the onset of their male stage. Application of various growth substances causing ethylene production by the flower advanced the male stage.

1 This research was supported in part by a grant from the Batsheva de Rothschild Fund for the Advancement of Science and Technology. Contribution from the Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel. 1974 Series, No. 145-E.






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Copyright © 1975 by the American Society of Plant Biologists