Molecular phylogeny, character evolution and historical biogeography of Cryptanthus Otto & A. Dietr. (Bromeliaceae)

Cruz, Geyner A.S., Zizka, Georg, Silvestro, Daniele, Leme, Elton M.C., Schulte, Katharina, and Benko-Iseppon, Ana M. (2017) Molecular phylogeny, character evolution and historical biogeography of Cryptanthus Otto & A. Dietr. (Bromeliaceae). Molecular Phylogenetics and Evolution, 107. pp. 152-165.

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Abstract

Cryptanthus comprises 72 species endemic to eastern Brazil with a center of diversity in the Atlantic Forest. The majority of the species are threatened due to habitat loss. We reconstructed phylogenetic relationships in Cryptanthus based on amplified fragment length polymorphisms (AFLP) including 48 species and 109 accessions. The Bayesian phylogenetic analysis revealed four major lineages in Cryptanthus and provided further evidence for the paraphyly of subgen. Hoplocryptanthus, while subgenus Cryptanthus was resolved as monophyletic. Monophyly of previously recognized morphological species groups at sectional level could not be confirmed. Based on the phylogenetic reconstruction we inferred the evolution of the sex system in Cryptanthus via maximum likelihood (ML) ancestral character reconstruction. Homoecy, the possession of hermaphrodite flowers only, was reconstructed as the ancestral state in the genus and characterizes three of the four main lineages within Cryptanthus. Andromonoecy, the possession of male and hermaphrodite flowers on the same plant, evolved only once and represents a synapomorphy of the fourth main lineage, C. subgen. Cryptanthus. The ancestral biome analysis reconstructed Cerrado (semiarid scrublands and forests) and campos rupestres (rock fields) as the most likely ancestral biomes for the genus. A shift to the Atlantic Forest biome was reconstructed to have occurred twice, in the ancestor of the first diverging lineage within the genus and in the ancestor of the C. subgen. Cryptanthus clade. A shift to the Caatinga (tropical dryland savanna) and one reversal to Cerrado (campos rupestres - rock fields) was reconstructed to have occurred once, in C. bahianus and C. arelii, respectively. The ancestral biome reconstruction indicates a high degree of niche conservatism within Cryptanthus with rare biome shifts throughout the evolution of the genus. Further, our results imply that the current infrageneric taxonomy of Cryptanthus is problematic and requires revision.

Item ID: 52077
Item Type: Article (Research - C1)
ISSN: 1095-9513
Keywords: molecular phylogeny, character evolution, historical biogeography, Cryptanthus
Funders: Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior (CAPES), German Academic Exchange Service (DAAD), Programa de Apoio e Desenvolvimento da Botanica (PNADB/CAPES), Conselho Nacional de Desenvolvimento Cientı´fico e Tecnolo´ gico (CNPq), Deutsche Forschungsgemeinschaft (DFG)
Projects and Grants: CAPES/DAAD PROBRAL project, DFG ZI 557/7-1
Date Deposited: 02 Mar 2018 03:50
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060310 Plant Systematics and Taxonomy @ 60%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 20%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060309 Phylogeny and Comparative Analysis @ 20%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960803 Documentation of Undescribed Flora and Fauna @ 80%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 20%
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