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首页> 外文期刊>Systematic Botany >Phylogeny of Asian Homalomena (Araceae) based on the ITS Region Combined with Morphological and Chemical Data
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Phylogeny of Asian Homalomena (Araceae) based on the ITS Region Combined with Morphological and Chemical Data

机译：基于ITS区域结合形态和化学数据的亚洲拟南芥（Araceae）系统发育

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摘要

A phylogenetic analysis of the genus Homalomena (Araceae: Homalomeneae) based on the nITS region is presented. Eighty-nine taxa are included; representing all Asian supergroups, several Neotropical species currently assigned to Homalomena, and selected species of Philodendron. Asian Homalomena is well supported as monophyletic and excludes Neotropical Homalomena. The Cyrtocladon supergroup is monophyletic after transferring the Insignis complex and Havilandii complex into the Punctulata supergroup. The Homalomena and Chamaecladon supergroups are well supported. A reduced phylogeny of 20 accessions representing 15 taxa was used for subsequent morphological and chemical marker optimization. A constricted spathe and four stamens per staminate flower are plesiomorphic for Homalomena. Staminodes among the pistillate zone are lost three times independently in Homalomena supergroup, Punctulata supergroup, and H. vivens. Chemical markers identified from liquid chromatography-mass spectroscopy profiling provided an independent set of markers that further support the separation of Neotropical species of Homalomena from the Asian taxon. Three chemical markers at R-t 2.55 min, 2.69 min, and 2.90 min are shared among the majority of taxa sampled for Asian Homalomena, and Neotropical species currently assigned to Homalomena show two unique peaks at R-t 3.25 min and 3.54 min. Five chemical markers support the Cyrtocladon supergroup with the exception of Homalomena vivens. A chemical marker at R-t 3.60 min is plesiomorphic for the Chamaecladon, Homalomena and Punctulata supergroups. A chemical marker at R-t 2.80 min is apomorphic for the Chamaecladon supergroup, with a separate gain in H. punctulata. This study supports removal of the Neotropical species from Homalomena, redefines the morphological boundaries of Homalomena sensu stricto (i.e. the Asian species), and supports and refines the grouping of Asian species into supergroups.
机译：提出了基于nITS区域的Homalomena属（天南星科：Homalomeneae）的系统发育分析。包括八十九个分类单元;代表所有亚洲超族，目前分配给霍马洛梅纳的几种新热带物种以及爱树木的精选物种。亚洲Homalomena具有良好的单系优势，不包括新热带Homalomena。在将Insignis复合体和Havilandii复合体转移到Punctulata超群后，Cyrtocladon超群是单系的。 Homalomena和Chamaecladon超群得到了良好的支持。代表15个分类单元的20个种的减少的系统发育用于随后的形态和化学标记优化。缩孔的茎和每个雄蕊花有四个雄蕊对Homalomena是多形的。在Homalomena超群，Punctulata超群和H. vivens中，雌蕊区域中的退化雄激素独立损失了3次。从液相色谱-质谱分析谱中鉴定出的化学标记物提供了一组独立的标记物，这些标记物进一步支持从亚洲分类群中分离出新近物种Homalomena。在大多数采样的亚洲Homalomena的类群中，在R-t 2.55分钟，2.69分钟和2.90分钟处共有三个化学标记，并且当前分配给Homalomena的新热带物种在R-t 3.25分钟和3.54分钟处显示两个独特的峰。五个化学标记支持Cyrtocladon超群，除了Homalomena活体。 R-t 3.60分钟处的化学标记对于Chamaecladon，Homalomena和Punctulata超群是多形的。 R-t 2.80 min时的化学标记对于Chamaecladon超群是无定形的，在点点绣球菌中有单独的增益。这项研究支持从Homalomena中去除新热带物种，重新定义严格的Homalomena sensu（即亚洲物种）的形态边界，并支持并将亚洲物种的分组细化为超群。

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