A bstractThe effect of purine (BA) and phenylurea (CPPU) cytokinins on apical dominance release in in vitro cultured Rosa hybrida L., cv. Madelon and Motrea was evaluated. Cv. Madelon shows stronger natural apical growth and fewer branches than cv. Motrea in vivo and in vitro. We examined the effects under three conditions, without the addition of the auxin IBA, in the presence of IBA, and in material pretreated with a pulse of IBA. Results were scored weekly for 4 weeks. BA and CPPU stimulated axillary bud break, and higher numbers of open buds were recorded in the presence of CPPU. When CPPU cytokinin was added to culture medium, physiologic features such as bud sprouting and shoot fresh and dry weight were enhanced. CPPU was also highly efficient for overcoming IBA inhibition of bud outgrowth. Different cultivar responses were observed.

中文翻译：

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苯脲细胞分裂素 CPPU 在体外培养玫瑰花中顶端优势释放中的作用。

摘要在体外培养的 Rosa hybrida L., cv. 中，嘌呤 (BA) 和苯脲 (CPPU) 细胞分裂素对顶端优势释放的影响。Madelon 和 Motrea 进行了评估。简历。与 cv.Madelon 相比，Madelon 显示出更强的自然顶端生长和更少的分支。Motrea 体内和体外。我们检查了三种条件下的效果，不添加生长素 IBA，存在 IBA，以及用 IBA 脉冲预处理的材料。每周对结果进行评分，持续 4 周。BA 和 CPPU 刺激了腋芽断裂，并且在 CPPU 存在的情况下记录了更多的开放芽。在培养基中加入CPPU细胞分裂素后，可增强芽萌芽和芽鲜干重等生理特性。CPPU 对于克服 IBA 对芽生长的抑制作用也非常有效。观察到不同的栽培品种反应。