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      Clado Mimosoide (Leguminosae-Caesalpinioideae) no Parque Estadual Mata da Pimenteira, Semiárido de Pernambuco, Brasil

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          Abstract

          Resumo Este trabalho consiste em um estudo florístico-taxonômico do clado Mimosoide (Leguminosae - Caesalpinioideae) realizado no Parque Estadual Mata da Pimenteira, primeira Unidade de Conservação em caatinga do estado de Pernambuco, localizado no município de Serra Talhada. As coletas mensais foram realizadas no período compreendido entre março de 2015 e março de 2016. Foram identificadas 14 espécies (nove gêneros): Anadenanthera colubrina, Chloroleucon dumosum, Desmanthus pernambucanus, Enterolobium timbouva, Mimosa arenosa var. arenosa, M. candollei, M. ophthalmocentra, M. modesta var. ursinoides, M. pigra var. pigra, M. tenuiflora, Neptunia plena, Parapiptadenia zehntneri, Piptadenia stipulacea e Senegalia tenuifolia. Características como número de folíolos, forma e localização de nectários, tipo de inflorescência, morfologia dos frutos e sementes foram essenciais para identificação dos táxons. São apresentados chave de identificação, descrições, comentários de distribuição geográfica e de afinidades taxonômicas das espécies.

          Translated abstract

          Abstract This work consists of a floristic-taxonomic study of the Mimosoid clade (Leguminosae - Caesalpinioideae), carried out in Mata da Pimenteira State Park, the first Conservation Unit in the state of Pernambuco, located in the municipality of Serra Talhada. The collections were monthly and executed during the period from March 2015 to March 2016. There were 14 species distributed in nine genera: Anadenanthera colubrina, Chloroleucon dumosum, Desmanthus pernambucanus, Enterolobium timbouva, Mimosa arenosa var. arenosa, M. candollei, M. ophthalmocentra, M. modesta var. ursinoides, M. pigra var. pigra, M. tenuiflora, Neptunia plena, Parapiptadenia zehntneri, Piptadenia stipulacea e Senegalia tenuifolia. Characteristics such as number of leaflets, shape and location of nectars, type of inflorescence, fruit and seed morphology were essential for the identification of taxa. Key identification, descriptions, comments of geographic distribution and taxonomic affinities of the species are presented.

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          Legume phylogeny and classification in the 21st century: Progress, prospects and lessons for other species-rich clades

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            The evolutionary history of Mimosa (Leguminosae): toward a phylogeny of the sensitive plants.

            Large genera provide remarkable opportunities to investigate patterns of morphological evolution and historical biogeography in plants. A molecular phylogeny of the species-rich and morphologically and ecologically diverse genus Mimosa was generated to evaluate its infrageneric classification, reconstruct the evolution of a set of morphological characters, and establish the relationships of Old World species to the rest of the genus. We used trnD-trnT plastid sequences for 259 species of Mimosa (ca. 50% of the total) to reconstruct the phylogeny of the genus. Six morphological characters (petiolar nectary, inflorescence type, number of stamens, number of petals, pollen type, and seismonasty) were optimized onto the molecular tree. Mimosa was recovered as a monophyletic clade nested within the Piptadenia group and includes the former members of Schrankia, corroborating transfer of that genus to Mimosa. Although we found good support for several infrageneric groups, only one section (Mimadenia) was recovered as monophyletic. All but one of the morphological characters analyzed showed high levels of homoplasy. High levels of geographic structure were found, with species from the same area tending to group together in the phylogeny. Old World species of Mimosa form a monophyletic clade deeply nested within New World groups, indicating recent (6-10 Ma) long-distance dispersal. Although based on a single plastid region, our results establish a preliminary phylogenetic framework for Mimosa that can be used to infer patterns of morphological evolution and relationships and which provides pointers toward a revised infrageneric classification.
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              A new subfamily classification of the leguminosae based on a taxonomically comprehensive phylogeny

              (2017)
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rod
                Rodriguésia
                Rodriguésia
                Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (Rio de Janeiro, RJ, Brazil )
                0370-6583
                2175-7860
                March 2019
                : 70
                : 0
                : e01902017
                Affiliations
                [1] Paulo Afonso Bahia orgnameUniversidade do Estado da Bahia orgdiv1Depto. Educação orgdiv2Prog. Pós-graduação em Biodiversidade Vegetal Brazil
                [2] Serra Talhada orgnameUniversidade Federal Rural de Pernambuco orgdiv1Unidade Acadêmica de Serra Talhada Brazil
                Article
                S2175-78602019000100204
                10.1590/2175-7860201970007
                6998fbe4-c92f-4534-b1d5-dfe7d79b66d5

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 02 March 2018
                : 15 May 2017
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 44, Pages: 0
                Product

                SciELO Brazil

                Categories
                Artigos Originais

                flora,plant taxonomy,unit of conservation,unidade de conservação,Caatinga,Fabaceae,taxonomia vegetal

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