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草叶通过原始延伸和小叶-重塑的演变

A E Richardson^1,2,3, J Cheng^1,4,5, R Johnston^6,7

¹John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.

Science (New York, N.Y.)

|December 9, 2021

概括

草的叶子是从原始区域扩展进化出来的,由WOX基因指导. 这种发育模型解释了草和叶的差异,表明盖子起源于树叶.

科学领域:

植物发育遗传学
进化生物学
计算机建模

背景情况:

单植物的覆盖叶的起源是一个长期存在的进化难题.
之前的假设缺乏全面的发展和遗传证据.

研究的目的:

为了阐明单叶的进化起源.
提供草和草叶的发育遗传模型.

主要方法:

使用发育遗传学的方法.
使用植物生长模式的计算建模.
分析基因表达模式,特别关注WOX基因.

主要成果:

覆盖叶可能是通过WOX基因依赖的延伸的,它与芽顶相关的原始区域.
在这个区域内,由极性场所指导的增长模式解释了草叶的发展.
区域收缩和生长重塑的原因是叶的发育.

结论:

盖子是欧枝的同类,叶片是叶片的同类.
这种经过修订的同源性挑战了以前关于叶子进化的解释.
一个统一的发育模型解释了单叶和欧叶之间的差异.

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