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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.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:tede/544 |
| Date | 29 August 2005 |
| Creators | Loureiro, Marta Bruno |
| Contributors | Rossetto, Claudia Antonia Vieira |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Curso de P?s-Gradua??o em Fitotecnia, UFRRJ, Brasil, Produ??o Vegetal |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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