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Plant Diversity ›› 2008, Vol. 30 ›› Issue (04): 391-399.DOI: 10.3724 SP.J.1143.2008.07267

• 研究论文 •    下一篇

东南亚地区五加科植物进化关系的初步研究

文 军1 , 2 , 朱昱苹3 , Chunghee LEE1   

  1. 1 Department of Botany, National Museum of Natural History , MRC166 , Smithsonian Institution, Washington, DC 20013-7012, U . S . A; 2 中国科学院植物研究所系统与进化植物学国家重点实验室, 北京 100093; 3 南京大学生命科学院, 江苏南京 210093 ; 4“ Herbarium Bogoriense, ” Puslitbang Biologi , Jalan Raya Juanda 22 , Bogor , Indonesia; 5 Forest Research Institute Malaysia ( FRIM) , Kepong , 52109 Kuala Lumpur, Malaysia
  • 收稿日期:2007-11-09 出版日期:2008-08-25 发布日期:2008-08-25
  • 通讯作者: 文 军

Evolutionary Relationships of Araliaceae in the Malesian
Region: a Preliminary Analysis

WEN Jun1 , 2 , ZHU Yu-Ping3 , Chunghee LEE1 , Elizabeth WIDJAJA4 , LENG Guan Saw5   

  1. 1 Department of Botany, National Museum of Natural History , MRC166 , Smithsonian Institution , Washington , DC 20013-7012, U . S . A; 2 State Key Laboratory of Systematic and Evolutionary Botany , Institute of Botany , Chinese Academy of Sciences, Beijing 100093 , China ; 3 College of Life Sciences, Nanjing University, Nanjing 210093 , China ; 4“ Herbarium Bogoriense , ” Puslitbang Biologi , Jalan Raya Juanda 22 , Bogor , Indonesia ;
    5 Forest Research Institute Malaysia ( FRIM) , Kepong , 52109 Kuala Lumpur , Malaysia
  • Received:2007-11-09 Online:2008-08-25 Published:2008-08-25
  • Contact: WEN Jun

摘要: 东南亚五加科包含14 个属约500 种, 本文应用ITS 片段对该区五加科植物的进化关系作了初步研究。研究显示该地区五加科植物具有复杂的起源, 很多属属于亚洲掌状复叶类群或Hedereae 族的一支中。该区特有类群Harmsiopanax 形态上非常特殊, 但其系统位置尚未不明朗。在Brassaiopsis 属中, 有几种形态差异较大的种, 但它们属同一单系, 加之各种间ITS 序列差异较小, 故应是新近起源于马来亚半岛和苏门达腊岛的种类。Wardenia simplex 聚类在Brassaiopsis 一支中, 故不支持将Wardenia 作为独立的属。东南亚地区对于Schefflera 属的发育非常重要, 已有的证据显示该区的Schefflera 属植物属于该属的Heptapleurum 类群。马来亚与泰国南部的Dendropanax lancifolius 并没有与Dendropanax 属的核心类群聚在一起, 其系统地位需进一步研究。Macropanax maingayi 是非常特殊的一个种, 曾被独立分出, 成立了单种属Hederopsis。本文的分析清楚表明它属于Macropanax 属。Aralia merrillii 因为其不同寻常的攀缘特性而被独立出来, 建立了单种属Acanthophora , 但ITS 序列分析支持将它置于Aralia 属中。新增的取样继续支持Arthrophyllum 的单系性。Osmoxylon的原初分布范围在东南亚, 它是五加科系统进化树上孤立的类群。

关键词: 五加科, 系统进化, 东南亚, Wardenia, Hederopsis

Abstract:

We employ the nuclear ribosomal ITS sequences to assess the evolutionary relationships of Araliaceae in the Malesian region . Malesian Araliaceae consist of 14 genera and about 500 species . Our analysis suggests a diffuse origin of
Araliaceae taxa, with many genera belong to the Asian palmate clade or the tribe Hedereae. The Malesian endemic Harmsiopanax is morphologically unique and its phylogenetic position is not well resolved at present. Several morphologically diverse species of Brassaiopsis perhaps have a relatively recent origin in the Malay Peninsula and Sumatra, as suggested by their monophyly as well as their low ITS sequence divergence
. Wardenia is not supported as W. simplex ( = B. simplex ) is nested within Brassaiopsis. The Malayan region is important for the development of Schefflera , and available evidence suggests that Schefflera in the region forms a clade with the Heptapleurum group. Dendropanax lancifolius does not form a clade with the core group of Dendropanax, and its status needs to be further analyzed. Macropanax maingayi was considered to be a highly distinct member comprising the monotypic genus Hederopsis. Our analysis clearly places it in Macropanax. Aralia merrillii was once considered to be the sole member of the genus Acanthophora because of its unusual climbing habit. The ITS data support its placement in Aralia. Our expanded sampling of Arthrophyllum continues to support its monophyly. Osmoxylon has a primary distribution in the Malesian region and it is a hylogenetically isolated member of Araliaceae.

Key words: Araliaceae

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