Yin Xiaofeng, Tsukaya Hirokazu
Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan.
Japan Society for the Promotion of Science, Tokyo, Japan.
Quant Plant Biol. 2022 Jun 14;3:e13. doi: 10.1017/qpb.2022.10. eCollection 2022.
Phyllotaxis, the regular arrangement of plant lateral organs, is an important aspect of quantitative plant biology. Some models relying on the geometric relationship of the shoot apex and organ primordia focus mainly on spiral phyllotaxis, a common phyllotaxis mode. While these models often predict the dependency of Fibonacci spirals on the Golden Angle, other models do not emphasise such a relation. Phyllotactic patterning in Asteraceae is one such example. Recently, it was revealed that auxin dynamics and the expansion and contraction of the active ring of the capitulum (head) are the key processes to guide Fibonacci spirals in gerbera (). In this paper, we discuss the importance of auxin dynamics, distinct phases of phyllotactic patterning, and the transition of phyllotaxis modes. These findings signify the local interaction among primordia in phyllotactic patterning and the notion that Fibonacci spirals may not need the Golden Angle.
叶序，即植物侧生器官的规则排列，是植物定量生物学的一个重要方面。一些依赖于茎尖与器官原基几何关系的模型主要关注螺旋叶序，这是一种常见的叶序模式。虽然这些模型常常预测斐波那契螺旋与黄金角的相关性，但其他模型并未强调这种关系。菊科植物中的叶序模式就是这样一个例子。最近，有研究表明生长素动态以及头状花序活性环的扩张和收缩是引导非洲菊中斐波那契螺旋的关键过程。在本文中，我们讨论了生长素动态的重要性、叶序模式的不同阶段以及叶序模式的转变。这些发现表明了叶序模式中原基之间的局部相互作用，以及斐波那契螺旋可能不需要黄金角这一观点。
