03. Unidade Acadêmica de Serra Talhada (UAST)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2925
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Item Emprego de estudos genéticos na taxonomia de Leguminosae Juss.(2021-07-15) Silva, Éwerton Jônatan Ferraz da; Frazão, Jailson Gitaí dos Santos; http://lattes.cnpq.br/6993259752232587; http://lattes.cnpq.br/3824325799075750Leguminosae Juss. comprises one of the largest families of angiosperms with approximately 770 genera and 19,500 species. In Brazil it is estimated about 2,756 species, of which 1,507 are endemic covering an area of approximately 11% of the national territory, also including the Caatinga domain with about 603 species represented. In its recent taxonomic classification, the family is divided into six subfamilies: Duparquetioidea, Cercidoideae, Detarioideae, Dialioideae; Caesalpinioidea and Papilionoidea. The objective of this work was to carry out a bibliographic survey about the main methodologies of cytogenetics and molecular genetics most used in the taxonomy of Leguminosae. Despite containing a high rate of 84% of the species analyzed, many of these records lack more in-depth data that help and clarify the taxonomic characterization at the intra and interspecific level. Among the main records included in the review, most of the conventional methodologies stood out, with 2n=24 being the most common chromosome number in the family, the prevalence of symmetrical karyotype and reticulated interphasic nucleus. Other different less frequent methodologies were observed, such as DNA quantification, the use of banding with fluorochromes and in situ hybridization.Item Taxonomia de Convolvulaceae a. Juss. na região do Pajeú, semiárido de Pernambuco, Brasil(2019-12-12) Costa, Rosemeire Santos; Melo, André Laurênio de; http://lattes.cnpq.br/0908553047440221; http://lattes.cnpq.br/4329938055697145Convolvulaceae includes 58 genera and about 1,880 species with cosmopolitan distribution, but with greater diversity in the tropics. In Brazil it is represented by 24 genera and 430 species. The Northeast of the country has a high number of family species and a great lack of knowledge about Convolvulaceae, although in recent years, several new species have been described, most of them endemic. Local studies have helped to narrow this gap, but little is known about the taxonomic and morphological diversity and geographic distribution of the family in some areas, especially in the semiarid. Thus, this study aims to perform a synopsis of the Convolvulaceae species in the Pajeú region, Pernambuco. The study area is located in the Caatinga phytogeographic domain and comprises 17 municipalities. The study was based on the collection and observation of field populations and analysis of collections belonging to the Semiarid Herbarium of Brazil (HESBRA). So far, 29 species have been recognized distributed in six genera, being Ipomoea the most representative with 19 species, followed by Jacquemontia, with four, Evolvulus with three, Merremia, Operculina and Turbina, with one species each. The recorded taxa can be differentiated mainly through characteristics of the habit, type and shape of leaves and sepals, dimensions and shape and color of the corolla and presence / absence of trichomes or types. All species are new records for area, as there were no family-specific taxonomic studies in the Pajéu region. Most species were found in caatinga vegetation, while I. alba, I. decipiens, I. indica and I. parasitica only in highland forests. Ipomoea alba, I carnea and I. indica are grown in the region as ornamental. Ipomoea bahiensis, I. brasiliana, I. rosea and Turbina cordata occur exclusively in Brazil and I. decipiens, I. marcellia and I. tenera are endemic to the Caatinga domain. Ipomoea decipiens is also here for the first time registered for Pernambuco. Identification keys and comments on geographic distribution, habitats, phenological data and distinctive character of the species are presented here. Endemism data and the new occurrence highlight the importance of preserving the environments found in the Pajeú region, especially the mountain forests, as well as reinforcing the need for further taxonomic studies in the area.