Evolutionary and developmental studies of unifacial leaves in monocots: Juncus as a model system
Evolutionary and developmental studies of unifacial leaves in monocots: Juncus as a model system
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DOI：
10.1007/s10265-009-0255-3
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发表时间：
2009
影响因子：
2.8
通讯作者：
Takahiro Yamaguchi;H. Tsukaya
中科院分区：
文献类型：
--
作者：
Takahiro Yamaguchi;H. Tsukaya
进化发育生物学的一个重要目标是了解导致形态多样性的分子遗传机制。被子植物的叶片通常呈扁平结构，具有明显的正面-背面极性。然而，在单子房植物中，在许多不同的物种中进化出了单面叶，其中叶片仅由背面同一性组成。单面叶发育的机制长期以来一直是比较形态学家争论的问题。然而，潜在的分子遗传机制尚不清楚。单面叶片是研究叶片极性特征的重要材料。此外，这些叶片为研究进化生物学中的重要现象提供了独特的机会，例如相似形态特征的重复进化或趋同进化。在这里，我们描述了单面叶在进化发育研究中的潜力，并介绍了我们最近使用juncusa作为模型系统来理解单面叶发育和进化机制的方法。
An important objective in evolutionary developmental biology is to understand the molecular genetic mechanisms that have given rise to morphological diversity. Leaves in angiosperms generally develop as a flattened structure with clear adaxial–abaxial polarity. In monocots, however, a unifacial leaf has evolved in a number of divergent species, in which leaf blades consist of only the abaxial identity. The mechanism of unifacial leaf development has long been a matter of debate for comparative morphologists. However, the underlying molecular genetic mechanism remains unknown. Unifacial leaves would be useful materials for developmental studies of leaf-polarity specification. Moreover, these leaves offer unique opportunities to investigate important phenomena in evolutionary biology, such as repeated evolution or convergent evolution of similar morphological traits. Here we describe the potential of unifacial leaves for evolutionary developmental studies and present our recent approaches to understanding the mechanisms of unifacial leaf development and evolution usingJuncusas a model system.