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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Doh, E.J., An, W.G., Son, KC. et al. Ethylene and indole-3-Acetic Acid participate in the in-rolling and opening of carnation petal segments. J. Plant Biol. 50, 174–180 (2007). https://doi.org/10.1007/BF03030627
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DOI: https://doi.org/10.1007/BF03030627