Molecular phylogeny of tribe Rhipsalideae (Cactaceae) and taxonomic implications for Schlumbergera and Hatiora
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2011
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Resumo |
Tribe Rhipsalideae is composed of unusual epiphytic or lithophytic cacti that inhabit humid tropical and subtropical forests. Members of this tribe present a reduced vegetative body, a specialized adventitious root system, usually spineless areoles and flowers and fruits reduced in size. Despite the debate surrounding the classification of Rhipsalideae, no studies have ever attempted to reconstruct phylogenetic relationships among its members or to test the monophyly of its genera using DNA sequence data; all classifications formerly proposed for this tribe have only employed morphological data. In this study, we reconstruct the phylogeny of Rhipsalideae using plastid (trnQ-rps16, rpl32-trnL, psbA-trnH) and nuclear (ITS) markers to evaluate the classifications previously proposed for the group. We also examine morphological features traditionally used to delimit genera within Rhipsalideae in light of the resulting phylogenetic trees. In total new sequences for 35 species of Rhipsalideae were produced (out of 55: 63%). The molecular phylogeny obtained comprises four main clades supporting the recognition of genera Lepismium, Rhipsalis, Hatiora and Schlumbergera. The evidence gathered indicate that a broader genus Schlumbergera, including Hatiora subg. Rhipsalidopsis, should be recognized. Consistent morphological characters rather than homoplastic features are used in order to establish a more coherent and practical classification for the group. Nomenclatural changes and a key for the identification of the genera currently included in Rhipsalideae are provided. (C) 2011 Elsevier Inc. All rights reserved. FAPESP Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) IAPT IAPT Universidade de Sao Paulo (USP) Universidade de São Paulo (USP) Royal Botanic Gardens, Kew Royal Botanic Gardens, Kew |
Identificador |
MOLECULAR PHYLOGENETICS AND EVOLUTION, v.58, n.3, p.456-468, 2011 1055-7903 http://producao.usp.br/handle/BDPI/27248 10.1016/j.ympev.2011.01.001 |
Idioma(s) |
eng |
Publicador |
ACADEMIC PRESS INC ELSEVIER SCIENCE |
Relação |
Molecular Phylogenetics and Evolution |
Direitos |
restrictedAccess Copyright ACADEMIC PRESS INC ELSEVIER SCIENCE |
Palavras-Chave | #Atlantic forest #Cactoideae #Epiphytic cacti #Lepismium #Rhipsalis #Character evolution #MAMMILLARIA CACTACEAE #SUBFAMILY CACTOIDEAE #PERESKIA CACTACEAE #SEQUENCE VARIATION #DNA #CHLOROPLAST #EVOLUTION #INFERENCE #ORIGINS #Biochemistry & Molecular Biology #Evolutionary Biology #Genetics & Heredity |
Tipo |
article original article publishedVersion |