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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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      Most cited references 18

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

       Jan Wieringa (2013)
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        Brazilian Flora 2020: Innovation and collaboration to meet Target 1 of the Global Strategy for Plant Conservation (GSPC)

          (2018)
        Abstract The Global Strategy for Plant Conservation (GSPC) was established by the Conference of Parties in 2002 to decrease the loss of plant diversity, reduce poverty and contribute to sustainable development. To achieve this overarching goal, the GSPC has established a series of targets, one of which is to ensure that plant diversity is well understood, so that it can be effectively conserved and used in a sustainable manner. Brazil hosts more than 46,000 species of plants, algae and fungi, representing one of the most biodiverse countries on Earth, and playing a key role in the GSPC. To meet the GSPC goals of Target 1 and facilitate access to plant diversity, Brazil committed to preparing the List of Species of the Brazilian Flora (2008-2015) and the Brazilian Flora 2020 (2016-present). Managing all the information associated with such great biodiversity has proven to be an extremely challenging task. Here, we synthesize the history of these projects, focusing on the multidisciplinary and collaborative approach adopted to develop and manage the inclusion of all the knowledge generated though digital information systems. We further describe the methods used, challenges faced, and strategies adopted, as well as summarize advances to date and prospects for completing the Brazilian flora in 2020.
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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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            Author and article information

            Affiliations
            Paulo Afonso Bahia orgnameUniversidade do Estado da Bahia orgdiv1Depto. Educação orgdiv2Prog. Pós-graduação em Biodiversidade Vegetal Brazil
            Serra Talhada orgnameUniversidade Federal Rural de Pernambuco orgdiv1Unidade Acadêmica de Serra Talhada Brazil
            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
            S2175-78602019000100204 10.1590/2175-7860201970007

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

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            Product Information: SciELO Brazil
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