Ethylene and IAA interactions in the inhibition of photoperiodic flower induction of <Emphasis Type="Italic">Pharbitis nil</Emphasis> |
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| Authors: | Jacek K?sy Beata Maciejewska Magdalena Sowa Magdalena Szumilak Krzysztof Kawa?owski Maja Borzuchowska Jan Kopcewicz |
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| Institution: | (1) Department of Physiology and Molecular Biology of Plants, Institute of General and Molecular Biology, Nicolaus Copernicus University, 9 Gagarina Street, 87-100 Torun, Poland |
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| Abstract: | It has been shown that both IAA and ethylene application inhibit flower induction in the short-day plant Pharbitis nil. However application of IAA has elevated ethylene production in this plant, as well. Strong enhancement of ethylene production
is also correlated with the night-break effect, which completely inhibits flowering. In order to determine what the role of
IAA and ethylene is in the photoperiodic flower induction in Pharbitis nil, we measured changes in their levels during inductive and non-inductive photoperiods, and the effects of ethylene biosynthesis
and action inhibitors on inhibition of flowering by IAA. Our results have shown that the inhibitory effect of IAA on Pharbitis nil flowering is not physiological but is connected with its effect on ethylene biosynthesis. |
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| Keywords: | Auxin Ethylene Flower induction Pharbitis nil |
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