Molecular phylogeny of the Brazilian endemic genus Orthophytum (Bromelioideae, Bromeliaceae) and its implications on morphological character evolution

Autor(es)

Louzada, Rafael B. ^[1] ; Schulte, Katharina ^{[2, 3]} ; Wanderley, Maria das Gracas L. ^[4] ; Silvestro, Daniele ^{[5, 6]} ; Zizka, Georg ^{[5, 6]} ; Barfuss, Michael H. J. ^[7] ; Palma-Silva, Clarisse ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Pernambuco, Dept Bot, BR-50670901 Recife, PE - Brazil

^[2] James Cook Univ, Australian Trop Herbarium, Cairns, Qld 4878 - Australia

^[3] James Cook Univ, Ctr Trop Biodivers & Climate Change, Townsville, Qld 4814 - Australia

^[4] Secretaria Meio Ambiente, Inst Bot, BR-01061970 Sao Paulo - Brazil

^[5] Goethe Univ Frankfurt, D-60325 Frankfurt - Germany

^[6] Res Inst Senckenberg, Dept Bot & Mol Evolut, D-60325 Frankfurt - Germany

^[7] Univ Vienna, Fac Life Sci, Dept Systemat & Evolutionary Bot, A-1030 Vienna - Austria

• Tipo de documento: Artigo Científico
• Fonte: Molecular Phylogenetics and Evolution; v. 77, p. 54-64, AUG 2014.
• Citações Web of Science: 14

Resumo

The saxicolous genus Orthophytum (similar to 60 species, Bromeliaceae) is endemic to eastern Brazil and diversified in xeric habitats of the Atlantic Rainforest, Caatinga and campos rupestres. Within the genus, two main groups are discerned based on the presence or absence of a pedunculate inflorescence, which are further subdivided into several morphological subgroups. However, these systematic hypotheses have not yet been tested in a molecular phylogenetic framework. Here we present the first phylogenetic analysis of Orthophytum using nuclear and plastid markers (phytochrome C, and trnH-psbA and trnL-trnF spacers). Forty species representing the two main groups and all subgroups of Orthophytum, and the related genera Cryptanthus (8 spp.) and Lapanthus (2 spp.) were analyzed. The phylogenetic reconstruction revealed a well-supported clade termed Eu-Orthophytum, containing species with pedunculate inflorescences only. The Orthophytum species with sessile inflorescence formed two clades: (1) the amoenum group and (2) the vagans group plus O. foliosum, the only pedunculate Orthophytum species found outside Eu-Orthophyturn. The vagans clade is in sister group position to Eu-Orthophytum. Within the latter, the subgroup mello-barretoi was sister to the most diversified clade, termed Core Orthophytum. Morphological character state reconstructions of floral characters used in previous taxonomic treatments as key diagnostic characters (penduncle presence, corolla form, and petal appendage form) showed different levels of homoplasy. (C) 2014 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 08/52912-5 - Revisao taxonomica e filogenia de orthophytum beer (bromeliaceae, bromelioideae).
• Beneficiário: Rafael Batista Louzada
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 09/52725-3 - Especiação, isolamento reprodutivo e genética de populações na família Bromeliaceae: implicações taxonômicas, evolutivas e conservacionistas
• Beneficiário: Clarisse Palma da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Jovens Pesquisadores