Wageningen University and Research Centre, Agrotechnology and Food Sciences Group (AFSG), P.O. Box 17, 6700 AA Wageningen, The Netherlands.
J Plant Physiol. 2013 Jan 15;170(2):161-4. doi: 10.1016/j.jplph.2012.09.014. Epub 2012 Dec 5.
Flower opening in Iris (Iris×hollandica) requires elongation of the pedicel and ovary. This moves the floral bud upwards, thereby allowing the tepals to move laterally. Flower opening is requires with elongation of the pedicel and ovary. In cv. Blue Magic, we investigated the possible role of hormones other than ethylene in pedicel and ovary elongation and flower opening. Exogenous salicylic acid (SA) and the cytokinins benzyladenine (N6-benzyladenine, BA) and zeatin did not affect opening. Jasmonic acid (JA) and abscisic acid (ABA) were slightly inhibitory, but an inhibitor of ABA synthesis (norflurazon) was without effect. Flower opening was promoted by gibberellic acid (GA(3)), but two inhibitors of gibberellin synthesis (4-hydroxy-5-isopropyl-2-methylphenyltrimethyl ammonium chloride-1-piperidine carboxylate, AMO-1618; ancymidol) did not change opening. The auxins indoleacetic acid (IAA) and naphthaleneacetic acid (NAA) strongly promoted elongation and opening. An inhibitor of auxin transport (2,3,5-triodobenzoic acid, TIBA) and an inhibitor of auxin effects [α-(p-chlorophenoxy)-isobutyric acid; PCIB] inhibited elongation and opening. The data suggest that endogenous auxins are among the regulators of the pedicel and ovary elongation and thus of flower opening in Iris.
鸢尾花（Iris×hollandica）的开花需要花葶和子房的伸长。这将花蕾向上移动，从而使花瓣侧向移动。开花需要花葶和子房的伸长。在 cv. Blue Magic 中，我们研究了除乙烯以外的激素在花葶和子房伸长和开花中的可能作用。外源水杨酸（SA）和细胞分裂素苄基腺嘌呤（N6-苄基腺嘌呤，BA）和玉米素没有影响开花。茉莉酸（JA）和脱落酸（ABA）略有抑制作用，但 ABA 合成抑制剂（norflurazon）没有效果。赤霉素（GA（3））促进开花，但赤霉素合成的两种抑制剂（4-羟基-5-异丙基-2-甲基苯基三甲基氯化铵-1-哌啶羧酸酯，AMO-1618；ancymidol）并没有改变开花。生长素吲哚乙酸（IAA）和萘乙酸（NAA）强烈促进伸长和开花。生长素运输抑制剂（2,3,5-三碘苯甲酸，TIBA）和生长素效应抑制剂 [α-（对氯苯氧基）-异丁酸；PCIB] 抑制伸长和开花。数据表明，内源性生长素是调节花葶和子房伸长进而调节鸢尾花开花的调节剂之一。
