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Annals of Botany 89: 689-693, 2002
© 2002 Annals of Botany Company

Effect of Ethylene on Flower Abscission: a Survey

WOUTER G. VAN DOORN*

Agrotechnological Research Institute (ATO), Wageningen University and Research Centre, PO Box 17, 6700 AA Wageningen, The Netherlands

* For correspondence. Fax +31 317 475347, e-mail w.g.vandoorn{at}ato.wag-ur.nl

Received: 9 January 2002; Returned for revision: 11 February 2002; Accepted: 22 February 2002.

The effect of ethylene on flower abscission was investigated in monocotyledons and eudicotyledons, in about 300 species from 50 families. In all species studied except Cymbidium, flower abscission was highly sensitive to ethylene. Flower fall was not consistent among the species in any family studied. It also showed no relationship with petal senescence or abscission, nor with petal colour changes or flower closure. Results suggest that flower abscission is generally mediated by endogenous ethylene, but that some exceptional ethylene-insensitive abscission occurs in the Orchidaceae.

Key words: Ethylene sensitivity, flower abscission, petal wilting and abscission, petal senescence.


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