Avalia o do tipo de substrato e do per赤odo de armazenamento para a germina o de sementes de Cordia glabrata (Mart.) DC. = Evaluation of substrate type and storage period for the germination of Cordia glabrata (Mart.) DC seeds

作者：Ademir Kleber Morbeck de Oliveira; Felipe Fernandes Alves; Juliana Gadum

来源：Acta Scientiarum - Biological Sciences, 2009.

• sementes florestais
• teste de germina o
• conserva o da semente
• viabilidade
• louropreto
• forest seeds
• germination test
• seed conservation
• feasibility
• louro preto

Informa es sobre a viabilidade e substratos adequados para a germina o de sementes de esp谷cies arb車reas nativas s o escassas. Cordia glabrata (louro-preto), esp谷cie pioneira e de ampla distribui o, est芍 inclu赤da entre essas esp谷cies. Suas caracter赤sticaspermitem a utiliza o em ornamenta o, na pr芍tica ap赤cola e na medicina popular. Levando em conta seu potencial de utiliza o, este trabalho teve por objetivo avaliar as taxas de germina o, em diferentes substratos, de sementes rec谷m-colhidas e armazenadas at谷 120 dias em laborat車rio, as quais foram coletadas no Pantanal do Rio Negro, Estado do Mato Grosso do Sul. Foram realizados testes com sementes rec谷m-colhidas e ap車s 30, 60, 90 e 120 dias de armazenamento, em tr那s tipos de substrato (papel-filtro, solo arenoso e solo arenoso + mat谷ria organica). Os resultados revelaram que C. glabrata possui pequena porcentagem de 芍gua (1,55%) nas sementes, que decai com o per赤odo de armazenamento. Seu per赤odo de viabilidade 谷 curto (90 dias) e os melhores resultados foram obtidos com sementes rec谷m-colhidas germinadas em papel-filtro (34%), com 赤ndice de velocidade de germina o de 10. Information about the feasibility and adequate substrates for the germination of seeds from native arboreous species are scarce. Cordiaglabrata (louro preto), a pioneering species with wide distribution, is included among these species. Its characteristics allow its use in ornamentation, apiculture and popular medicine. Considering its potential of utilization, this work had as objective to evaluate thegermination rates, in different substrates, of recently reaped seeds stored for up to 120 days in laboratory, which were collected in Pantanal of the Rio Negro, Mato Grosso do Sul State. Tests were done with recently reaped seeds and after 30, 60, 90 and 120 days ofstorage, in three kinds of substrate (paper filter, sandy soil and sandy soil + organic matter). The results revealed that C. glabrata has a small percentage of water (1.55%) in the seeds, which decreases with the storage period. Its feasibility period is short (90 days) and the best results were obtained with recently reaped seeds germinated in paper filter (34%), with a germination speed rate of 10.