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Plant Physiology 58:663-665 (1976)
© 1976 American Society of Plant Biologists

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Articles

Regulation of Senescence in Carnation (Dianthus caryophyllus)

Effect of Abscisic Acid and Carbon Dioxide on Ethylene Production 1

Shimon Mayak2 and David R. Dilley

a Michigan State University

Abscisic acid hastened senescence of carnation flowers and this was preceded by stimulation of accelerated ethylene production. Carbon dioxide delayed the onset of autocatalytic ethylene production in flowers regardless of treatment with abscisic acid. Flowers exhibited a low and transient climacteric of ethylene production without wilting while in 4% carbon dioxide and underwent accelerated ethylene production culminating in wilting when removed from carbon dioxide. Hypobaric ventilation, which lowers ethylene to hyponormal levels within tissues, extended flower longevity and largely negated enhancement of senescence by abscisic acid. Supplementing hypobarically ventilated flowers with ethylene hastened senescence irrespective of abscisic acid treatment. Collectively, the data indicate that abscisic acid hastens senescence of carnations largely as a result of advancing the onset of autocatalytic ethylene production.

2 Present address: Faculty of Agriculture, The Hebrew University, Rehovot, Israel.

1 Michigan Agricultural Experiment Station Journal Article No. 7513.




This article has been cited by other articles:


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 J Exp BotHome page
K. Shibuya, T. Yoshioka, T. Hashiba, and S. Satoh
Role of the gynoecium in natural senescence of carnation (Dianthus caryophyllus L.) flowers
J. Exp. Bot., December 1, 2000; 51(353): 2067 - 2073.
[Abstract] [Full Text] [PDF]


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Copyright © 1976 by the American Society of Plant Biologists