Repositório RCAAP

Anthropogenic active in forest environmental take formation of small fractions forest separated by large agro-pastoral areas. In the edges of these fragments increase the availability of light, a factor favorable to the establishment and the development of climber plants. This study aimed to characterize the floristic composition and the ecological aspects of the climber plants in three fragments of semideciduos forest in Uberlândia. For the floristic survey were collected monthly from March 2010 to March 2011. The species were classified according the habit, climbing strategy, dispersal syndrome and occurrence. Also compared species richness of our fragments with other semideciduous forests of São Paulo State. We registered 99 species inclued in 25 families and 63 genera. In the fragment of São José was found 72 species, followed by Glória (53) and Irara (52 species). The families richest in species are Bignoniaceae (16), Malpighiaceae (12), Sapindaceae (11), Fabaceae (10), Apocynaceae (9), Convolvulaceae and Asteraceae (5). In the three areas there was predominance of woody species, rare and anemochoric. The species with tendrils were more representative in the Irara and São José, while in the Glória was higher proportions twining species. The three fragments of semideciduos forest in Uberlândia the composition of species were very heterogeneous with low floristic similarity among them and with other fragments placed the São Paulo State. This suggest that climbing plants are structural components of vegetation and not only invasive favored by the fragmentation of forests.

The Asteraceae (Compositae) is the largest angiosperm family with 43 tribes, 1.600-2.000 genera and 24.000-30.000 species, distributed around the globe except for Antarctica. The tribe Vernonieae has undergone changes in its classification, since the largest genera of the tribe, Vernonia Schreb, was segregated in several others, and several subtribes were created. The subtribe Sipolisiinae is characterized by its receptacle with pales or spines and cypsela usually with phytomelanin, and contains the genera Heterocoma DC., Bishopalea H. Rob, Sipolisia Glaz. ex Oliv., Xerxes J. R. Grant e Hololepis DC. The monophyletism of this subtribe has been questioned since it was created. With a new proposal of classification Hololepis is excluded from the subtribe, and all genera are synonymized under Heterocoma. To evaluate this proposed classification of the subtribe, anatomic and taxonomic studies were carried out. Through the foliar and cypsela anatomy, these proposal was confirmed, once no anatomic character justify the recognition of the genera. Besides, the genus Hololepis presented several anatomic characters which differentiates it from others notably the lack of phytomelanin in the cypsela. Based on this proposal of classification, the taxonomic study confirms the anatomic analysis, since there are no relevant morphological characters reliable to clearly support any taxa at the generic level. In this study is provided a key for the seven species recognized in Heterocoma, and a description of a new specie Heterocoma semiriana F. S. Freitas & J. N. Nakajima.

Asteraceae is the biggest family within the angiosperms. It is organized in 43 tribes with something about 1600 genera and 23000-30000 species. The tribe Vernonieae has 125 genera and more than 1500 species. It is distributed in America, with a great diversity in the southeast of Brazil, south of Africa, southeast of Asia and in the Pacific. Vernonieae is considered monophyletic, however it is not easy to identify its subtribes because of the size and distribution of the genus Vernonia core. Therefore, based on recent studies Vernonieae was divided in 21 subtribes. The subtribes Mesanthophorinae, Lepidaploinae and Vernoniinae stand out as important because they represent with half of the genera included in the tribe most of the genera segregated from Vernonia s. l. that occur in Brazil. Thus, was developed in this work the taxonomic study for the species of the genera Acilepidopsis H. Rob., Chrysolaena H. Rob., Echinocoryne H. Rob., Stenocephalum Sch. Bip. e Vernonanthura H. Rob. that occurs in Minas Gerais. The morphological descriptions were based on the specimens deposited in brazilian herbaria. However in Minas Gerais state there were found 24 species of Venonanthura, of which three species received new combinations. There were also found seven species of Chrysolaena, four species of Echinocoryne, three species of Stenocephalum and one species of Acilepidopsis. The species Chrysolaena sp. nov. and V. cabralensis were considered endemic to Minas Gerais state.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

This study aimed a) to carry out a floristic survey of Melastomataceae species occurring in Biribiri state Park located in the city of Diamantina, Minas Gerais; b) identify endemisms throughout the Espinhaço Range; c) determine the conservation status of Melastomataceae species of State Park Biribiri; d) make a floristic comparison with other areas of this chain. and e) realize a systematic tratament with identification key, morphologic descriptions and data on geographic distribuition of subfamilies Memecyloideae and Melastomatoideae, tribes Melastomeae, Merianieae and MiconieaeA floristic survey was carried out through 2011 to 2012 and all specimens are deposited at Herbarium Uberlandense (HUFU). Melastomataceae are represented in the state park Biribiri by 100 species in 23 genera. Melastomatoideae are represented by 99 species, while Memecyloideae has only Mouriri glazioviana. The tribe with the largest number of species is Microlicieae with 48 species, represented by Microlicia (28 species), Lavoisiera (nine species), Cambessedesia (four species), Trembleya (three species), Rhynchanthera (two species), Chaetostoma and Lithobium (one species each). The tribe Melastomeae, with 25 species, are represented by genera Tibouchina (11 species), Comolia, Pterolepis, Siphanthera (three species each), Marcetia (two species), Acisanthera, Desmoscelis and Macairea (one species each). The tribe Merianieae are represented by Huberia piranii and Merianthera sipollisi. The tribe Miconieae, with 24 species, are represented by genera Miconia (14 species), Leandra (five species), Clidemia (three species), Tococa and Ossaea (one species each). The Melastomataceae flora of the State Park Biribiri is more similar to Serra do Cabral and Serra do Cipó floras both located in Serra do Espinhaço (Minas Gerais). The Melastomataceae flora of the Chapada Diamantina is quite distinct of the Melastomataceae flora of the Serra do Espinhaço , mainly due to the peculiarities and high levels of endemism in each sector. Approximately 30% of the Melastomataceae flora of the Espinhaço is endemic in this region, and the Diamantina Plateau and the Serra do Cipo areas with the highest rate of endemism. At least 47 species of Melastomataceae State Park Biribiri are indicated in any category of threat.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Fundação de Amparo a Pesquisa do Estado de Minas Gerais