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KMID : 0368420070500020174
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Journal of Plant Biology
2007 Volume.50 No. 2 p.174 ~ p.180
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Ethylene and indole-3-Acetic Acid participate in the in-rolling and opening of carnation petal segments
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Doh Eui-Jeong
An Won-Gyoung
Son Ki-Cheol
Kim Soon-Young
Oh Seung-Eun
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Abstract
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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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KEYWORD
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carnation ethylene, IAA, in-rolling, opening, petal
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