Made available in DSpace on 2016-04-28T14:58:57Z (GMT). No. of bitstreams: 1 2005-Marta Bruno Loureiro.pdf: 2008902 bytes, checksum: 98c5d8a1e29a820780c9fe727ebed874 (MD5) Previous issue date: 2005-08-29 / Funda??o Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro / Apuleia leiocarpa is a forestall specie commonly known as grapia and garapa. Its trees are widely spread over Brazilian territory occurring more specifically on rain forest formations with seasonal semidecidious characteristics. Garapa seeds are an important source of medicinal substances as well as used for ornamental and environmental recovery purposes. It has been used on both tanning and timber industry and notably its natural populations have deeply decreased its growth due to massive exploitation. In this context, this work aimed to evaluate the development of A. leiocarpa seeds during the maturation phase. Researches were conducted for two successive crop years (2002 and 2003) and also analyzed seeds performance under specific storage conditions and the physiological quality of seeds. This scientific study results might be used as database information to guide the elaboration of specie s preservation proposals. Research samples were collected at Tingu? Biological Reserve, state of Rio de Janeiro, Brazil and biological analysis and tests were performed at Seeds Analysis Laboratory of Universidade Federal Rural do Rio de Janeiro at Serop?dica city, Brazil. This work results concludes that A. leiocarpa seeds physiological maturity was achieved within 98 days after anthesis (98DAA) in 2002. In 2003 it was not able to objectively determine the seeds maturity cycle. Seeds harvests are recommended as soon as fruits aspect changes from green-yellow to brown color combined with a higher proportion of brown seeds availability. The most efficient technique to overcome seed dormancy was the use of immersion treatment into concentrated sulphuric acid during 20 minutes. It was not observed any influence of either testa color or its size on A. leiocarpa seed germination process. The use of half-permeably packaging (polyethylene bags) under a nominal temperature of 18?C and 50% relative humidity was considered the most appropriate storage condition to A. leiocarpa seeds. / Apuleia leiocarpa ? uma esp?cie florestal, conhecida como gr?pia e garapa, que apresenta ampla distribui??o geogr?fica no territ?rio brasileiro, ocorrendo na mata atl?ntica, nas forma??es caracter?sticas da Floresta Estacional Semidecidual. A esp?cie apresenta import?ncia na industria madeireira e de curtume, possui indica??es de uso medicinal, ornamental e em plantios para recupera??o ambiental. No entanto, foi extra?da de forma maci?a, e suas popula??es naturais sofreram diminui??o significativa. Diante desta situa??o, os objetivos deste trabalho foram acompanhar a matura??o das sementes de Apuleia leiocarpa em dois anos de produ??o (2002 e 2003), avaliar o comportamento das sementes durante o armazenamento e analisar os fatores intr?nsecos ?s sementes que afetam sua qualidade fisiol?gica, a fim de gerar informa??es que possam nortear a elabora??o de propostas para a conserva??o da esp?cie. As coletas foram realizadas na Reserva Biol?gica do Tingu?, RJ e os ensaios conduzidos no Laborat?rio de An?lise de Sementes da Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ. Com base nos resultados obtidos pode-se concluir que a maturidade fisiol?gica das sementes de Apuleia leiocarpa foi atingida aos 98 DAA no ano de 2002 e n?o pode ser determinada em 2003. ? recomend?vel que a coleta de sementes seja realizada a partir do momento em que ocorre a mudan?a de colora??o dos frutos de verdeamarelo para marrom, juntamente com aparecimento da maior propor??o de sementes com colora??o marrom A escarifica??o com ?cido sulf?rico concentrado por vinte minutos, foi considerado o tratamento mais indicado para a supera??o da dorm?ncia de sementes. Nem o tamanho das sementes, nem a colora??o do tegumento influenciaram a porcentagem de germina??o de sementes de Apuleia leiocarpa. . A embalagem semiperme?vel sob c?mara seca (18?C e U.R. de 50%), foi considerada a condi??o mais adequada para a conserva??o de sementes de Apuleia leiocarpa.