Ethylene and indole-3-Acetic Acid participate in the in-rolling and opening of carnation petal segments |
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Authors: | Eui Jeong Doh Won Gyoung An Ki-Cheol Son Soon Young Kim Seung-Eun Oh |
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Institution: | (1) Department of Biological Sciences, Konkuk University, 143-701 Seoul, Korea;(2) Department of Environmental Science, Konkuk University, 143-701 Seoul, Korea;(3) Department of Biological Sciences, Andong National University, 760-749 Andong, Korea |
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Abstract: | We have examined the inward-rolling and outward-opening of petals from 90° stage carnation flowers (Dianthus charyophyllus L. cv. Pink Donor). Ethylene released from 2-chloroethylphosphonic acid (CEPA) induced in-rolling in the lower portions of
the petals while that action was suppressed by an inhibitor of auxin transport. Another plant hormone, indole-3-acetic acid
(IAA), intensified this ethylene-induced in-rolling. In contrast, when ethylene was not applied, the same IAA concentration
promoted the opening of petal segments. Our data suggest that a low level of ethylene acts on IAA-induced opening. Likewise,
we can speculate that endogenous concentrations of ethylene could be an important determinant of petal responses that involve
interactions between ethylene and IAA. |
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Keywords: | carnation ethylene IAA in-rolling opening petal |
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