Leaf development follows a common principle but is also flexibly tuned in different species in a spatiotemporal manner. A novel regulatory mechanism controlling leaflet formation has been identified in Medicago.

中文翻译：

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保持树叶的形状。

叶片发育遵循共同的原则，但也可以以时空方式灵活地在不同物种中进行调节。在紫花苜蓿中已经确定了控制小叶形成的新型调节机制。