黄麻茎的叶序受赤霉素改变。

Phyllotaxis in xanthium shoots altered by gibberellic Acid.

出版信息

Science. 1977 Jun 10;196(4295):1201-3. doi: 10.1126/science.196.4295.1201.

DOI:10.1126/science.196.4295.1201

Abstract

Gibberellic acid treatment of vegetative Xanthium shoots induced a change in phyllotaxis and almost doubled the rate of leaf production. Phyllotaxis in control plants displayed a 2,3 contact parastichy pattern; that of the treated plants could be approximated with a 3,5 pattern. Thus, the Xanthium apex switched to a new mode of growth and a higher order of phyllotactic leaf arrangement not seen in untreated plants. It may be inferred from these experiments that gibberellic acid plays a role in determining the site of leaf initiation.

摘要

赤霉素处理黄杨的营养芽，引起了叶序的变化，使叶片的产生速度几乎增加了一倍。对照植株的叶序表现为 2-3 接触的互生形式；而处理植株的叶序可以用 3-5 形式来近似。因此，黄杨的顶端转变为一种新的生长模式，出现了一种在未处理植株中未见的较高等级的互生叶序。从这些实验中可以推断，赤霉素在决定叶原基发生的部位方面起作用。