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Ciência Florestal
Article . 2008 . Peer-reviewed
Data sources: Crossref
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Ciência Florestal
Article
License: CC BY NC
Data sources: UnpayWall
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Resposta de sementes de <i>Podocarpus lambertii </i>e <i>Podocarpus sellowii</i> – (Podocarpaceae) à dessecação.

Authors: Lucinda Carneiro Garcia; Antonio Carlos Nogueira;

Resposta de sementes de <i>Podocarpus lambertii </i>e <i>Podocarpus sellowii</i> – (Podocarpaceae) à dessecação.

Abstract

Estudos relacionados ao comportamento de sementes de espécies florestais permitem a obtenção de material de boa qualidade fisiológica, imprescindível nos trabalhos silviculturais com essas espécies. O presente trabalho teve por objetivo avaliar o comportamento de sementes de Podocarpus lambertii Klotzsch ex Endl. e Podocarpus sellowii Klotzsch ex Endl., em relação à dessecação. A secagem das sementes foi efetuada em câmara com ventilação forçada e ar aquecido, à temperatura de 35ºC, pelos períodos de 12; 24; 48 e 72 horas, para Podocarpus lambertii e 24; 48; 72 e 96 horas, para Podocarpus sellowii. As sementes com umidade inicial de 28,7 e 45,5% respectivamente, após a desidratação, ficaram com os seguintes teores de água: 21,7; 14,3; 7 e 5,7% para Podocarpus lambertii e 36,9; 36; 34 e 26,8% para Podocarpus sellowii. A qualidade fisiológica das sementes foi avaliada por meio do teste de germinação e Índice de Velocidade de Germinação. De acordo com os resultados, pôde-se concluir que as sementes de Podocarpus lambertii têm comportamento de semente ortodoxa, com grau crítico de umidade abaixo de 5,7% de água, e as sementes de Podocarpus sellowii apresentam comportamento típico de semente recalcitrante, com grau crítico de umidade de aproximadamente 26,8% de água.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
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