Cardoso Domingos, São-Mateus Wallace M B, da Cruz Daiane Trabuco, Zartman Charles E, Komura Dirce L, Kite Geoffrey, Prenner Gerhard, Wieringa Jan J, Clark Alexandra, Lewis Gwilym, Pennington R Toby, de Queiroz Luciano Paganucci
Departamento de Botânica, Instituto de Biologia, Universidade Federal da Bahia, Rua Barão de Geremoabo, s/n, Campus Universitário de Ondina, 40170-115 Salvador, Bahia, Brazil; Programa de Pós-Graduação em Botânica (PPGBot), Universidade Estadual de Feira de Santana, Av. Transnordestina, s/n, Novo Horizonte, 44036-900 Feira de Santana, Bahia, Brazil.
Programa de Pós-Graduação em Botânica (PPGBot), Universidade Estadual de Feira de Santana, Av. Transnordestina, s/n, Novo Horizonte, 44036-900 Feira de Santana, Bahia, Brazil.
Mol Phylogenet Evol. 2015 Mar;84:112-24. doi: 10.1016/j.ympev.2014.12.015. Epub 2015 Jan 7.
Recent deep-level phylogenies of the basal papilionoid legumes (Leguminosae, Papilionoideae) have resolved many clades, yet left the phylogenetic placement of several genera unassessed. The phylogenetically enigmatic Amazonian monospecific genus Petaladenium had been believed to be close to the genera of the Genistoid Ormosieae clade. In this paper we provide the first DNA phylogenetic study of Petaladenium and show it is not part of the large Genistoid clade, but is a new branch of the Amburaneae clade, one of the first-diverging lineages of the Papilionoideae phylogeny. This result is supported by the chemical observation that the quinolizidine alkaloids, a chemical synapomorphy of the Genistoids, are absent in Petaladenium. Parsimony and Bayesian phylogenetic analysis of nuclear ITS/5.8S and plastid matK and trnL intron agree with a new interpretation of morphology that Petaladenium is sister to Dussia, a genus comprising ∼18 species of trees largely confined to rainforests in Central America and northern South America. Petaladenium, Dussia, and Myrospermum have papilionate flowers in a clade otherwise with radial floral symmetry, loss of petals or incompletely differentiated petals. Our phylogenetic analyses also revealed well-supported resolution within the three main lineages of the ADA clade (Angylocalyceae, Dipterygeae, and Amburaneae). We also discuss further molecular phylogenetic evidence for the undersampled Amazonian genera Aldina and Monopteryx, and the tropical African Amphimas, Cordyla, Leucomphalos, and Mildbraediodendron.
最近对基部蝶形花亚科豆科植物（豆科，蝶形花亚科）的深层系统发育研究已经解决了许多分支，但仍有几个属的系统发育位置未得到评估。系统发育上神秘的亚马逊单型属Petaladenium曾被认为与染料木亚科Ormosieae分支的属关系密切。在本文中，我们首次对Petaladenium进行了DNA系统发育研究，结果表明它并非染料木亚科大分支的一部分，而是Amburaneae分支的一个新分支，是蝶形花亚科系统发育中最早分化的谱系之一。这一结果得到了化学观察的支持，即Petaladenium中不存在染料木亚科化学共衍征喹诺里西啶生物碱。对核ITS/5.8S以及质体matK和trnL内含子进行简约法和贝叶斯系统发育分析，结果与对形态学的新解释一致，即Petaladenium是Dussia的姐妹属，Dussia是一个包含约18种树的属，主要分布在中美洲和南美洲北部的雨林中。Petaladenium、Dussia和Myrospermum在一个分支中具有蝶形花，而该分支中的其他植物具有辐射状花对称性、花瓣缺失或花瓣分化不完全。我们的系统发育分析还揭示了ADA分支（Angylocalyceae、Dipterygeae和Amburaneae）三个主要谱系内部得到有力支持的分支情况。我们还讨论了关于采样不足的亚马逊属Aldina和Monopteryx以及热带非洲属Amphimas、Cordyla、Leucomphalos和Mildbraediodendron的进一步分子系统发育证据。
