Complex patterns of gene duplication in the APETALA3 and PISTILLATA lineages of the Ranunculaceae
Complex patterns of gene duplication in the APETALA3 and PISTILLATA lineages of the Ranunculaceae
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DOI：
10.1086/344694
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发表时间：
2003-01-01
影响因子：
2.3
通讯作者：
Schl端ter, PM
中科院分区：
文献类型：
--
作者：
Kramer, EM;Di Stilio, VS;Schl端ter, PM
有人提出，转录因子MADS - box基因家族的多样化在陆地植物的辐射演化中起了重要作用。这一观点是基于这些基因在植物发育中所起的关键作用，以及关键的基因复制事件与主要辐射演化的明显巧合，比如B和C谱系的形成与种子植物的进化同时发生。在更近的时间尺度上，后续的基因复制事件也可能对后来的形态多样化有所贡献。为了研究这种可能性，我们正在研究毛茛科中花瓣和雄蕊特征基因APETALA3（AP3）和PISTILLATA（PI）同源基因的进化。在这个科中，AP3和PI谱系在各个系统发育层次上都经历了许多基因复制事件。早期的复制产生了三个旁系同源的AP3谱系，它们在整个科中都存在。相比之下，PI谱系中大量的复制是相对近期发生的。我们提出一个假设，即这些复制在毛茛科独特的花瓣状器官的进化中起了作用，并提供了初步的表达数据来支持这一设想。
It has been proposed that the diversification of the MADS-box gene family of transcription factors has played a major role in the radiation of land plants. This suggestion is based on the critical roles that these genes play in plant development and the apparent coincidence of key duplication events with major radiations, such as the establishment of the B and C lineages concurrent with the evolution of the seed plants. On a more recent scale, it is also possible that subsequent duplication events have contributed to later morphological diversifications. In order to investigate this possibility, we are studying the evolution of homologs of the petal and stamen identity genes APETALA3 (AP3) and PISTILLATA (PI) in the Ranunculaceae. In this family, the AP3 and PI lineages have undergone many duplication events at every phylogenetic level. Early duplications gave rise to three paralogous AP3 lineages, which are found throughout the family. In contrast, numerous duplications have occurred relatively recently in the PI lineage. We outline a hypothesis that these duplications have played a role in the evolution of the unique types of petaloid organs in the Ranunculaceae and present preliminary expression data supporting such a scenario.