Hentschel Jörn, von Konrat Matthew J, Pócs Tamás, Schäfer-Verwimp Alfons, Jonathan Shaw A, Schneider Harald, Heinrichs Jochen
Department of Systematic Botany, Albrecht von Haller Institute of Plant Sciences, Untere Karspüle 2, 37073 Göttingen, Lower Saxony, Germany.
Mol Phylogenet Evol. 2009 Jul;52(1):142-56. doi: 10.1016/j.ympev.2008.12.021. Epub 2009 Jan 4.
With an estimated 300-375 species, Frullania is the largest genus of Porellales and forms a major clade of leafy liverworts. The cosmopolitan genus includes mostly epiphytes and represents an important component of the cryptogamic vegetation in various, especially tropical, habitats. There have been abundant changes and modifications to the infrageneric classification of Frullania, with up to fifteen subgenera and numerous sections solely based on morphology. Here we present the first molecular phylogeny of Frullania using four markers (rbcL, psbA, trnL-trnF region of cp DNA, nr5.8S-ITS-2 region) and 171 accessions from throughout the range. The molecular data provide evidence for the monophyly of several subgenera and support intercontinental ranges of these clades. Previous subgeneric assignment for a suite of taxa based on morphological evidence is not supported by the molecular data. Representatives of the genera Amphijubula, Neohattoria and Schusterella are nested in robust subclades of Frullania. Basal relationships within Frullania are largely unsupported. Based on the outcome of the phylogenetic analyses we present a revised supraspecific classification and provide evidence for the monophyly of some morphological species. Disjunct distributional patterns within Frullania cannot be explained by Gondwanan vicariance.
叶苔属约有300 - 375个物种，是光萼苔目中最大的属，也是叶状苔类植物的一个主要分支。这个世界性的属主要由附生植物组成，是各种生境（尤其是热带生境）中隐花植物植被的重要组成部分。叶苔属的属下分类有大量变化和修订，仅基于形态学就有多达15个亚属和众多组。在此，我们利用四个标记（rbcL、psbA、叶绿体DNA的trnL - trnF区域、nr5.8S - ITS - 2区域）以及来自全球范围的171个样本，首次呈现了叶苔属的分子系统发育情况。分子数据为几个亚属的单系性提供了证据，并支持了这些分支的洲际分布范围。基于形态学证据对一系列分类群进行的先前亚属划分并不被分子数据所支持。Amphijubula属、新帽鳞苔属和Schusterella属的代表物种嵌套在叶苔属的稳健亚分支中。叶苔属内的基部关系在很大程度上缺乏支持。基于系统发育分析的结果，我们提出了一个修订后的超种分类，并为一些形态学物种的单系性提供了证据。叶苔属内的间断分布模式无法用冈瓦纳间断分布来解释。
