The closest living relatives of land plants
The closest living relatives of land plants
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DOI：
10.1126/science.1065156
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发表时间：
2001-12-14
期刊：
影响因子：
56.9
通讯作者：
Delwiche, CF
中科院分区：
文献类型：
--
作者：
Karol, KG;McCourt, RM;Delwiche, CF
胚胎植物（陆生植物）一直被认为与绿藻群绿藻有关，尽管这种关系的性质和陆生植物的起源仍然没有得到解决。通过四基因植物遗传学分析来研究这些关系。这一分析支持了陆地植物在系统发育上被置于绿藻门的假设，确定了Charales（石草）是植物的近亲，并表明coleochaetale是Charales/陆生植物组合的姐妹。这些结果也支持单细胞鞭毛虫中柱头是叶绿植物谱系中最早的分支。这些发现提供了对植物祖先的本质的深入了解，并对理解从水生绿藻到陆生植物的转变具有广泛的意义。
The embryophytes (land plants) have long been thought to be related to the green algal group Charophyta, though the nature of this relationship and the origin of the land plants have remained unresolved. A four-gene phytogenetic analysis was conducted to investigate these relationships. This analysis supports the hypothesis that the land plants are placed phylogenetically within the Charophyta, identifies the Charales (stoneworts) as the closest living relatives of plants, and shows the Coleochaetales as sister to this Charales/land plant assemblage. The results also support the unicellular flagellate Mesostigma as the earliest branch of the charophyte lineage. These findings provide insight into the nature of the ancestor of plants, and have broad implications for understanding the transition from aquatic green algae to terrestrial plants.