subsídio hídrico fornecido por substratos alternativos usados na germinação in vitro de pinus taeda l. water supply offered by alternative substrates used in in vitro pinus taeda l. germination

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ID: 191014
2009
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Abstract
Os objetivos deste trabalho foram avaliar o suprimento hídrico fornecido por diferentes substratos alternativos e analisar sua eficiência na sanidade e na germinação in vitro de sementes de Pinus taeda L. Sementes foram inoculadas em papel filtro, algodão hidrófilo e meio ágar-água. Foi avaliada a absorção de água pelas sementes por três, seis, nove, 24, 48 e 72 horas. Posteriormente, aos 21 dias de cultivo, foi determinada a contaminação por microrganismos. A absorção de água, com base no aumento percentual que ocorreu na massa das sementes, foi superior em papel filtro e algodão hidrófilo. Os melhores percentuais de germinação foram obtidos com papel filtro e ágar-água. Contudo, este último apresentou as maiores taxas de contaminação. Devido à perda de água no substrato papel filtro no decorrer do tempo, recomenda-se o uso de algodão hidrófilo em função dos baixos índices de contaminação observados.
The aim of this study was to assess the water supply provided by different alternative substrates as well as to analyze its efficiency in the sanity and in the in vitro germination of Pinus taeda L. seeds. The seeds were inoculated in filter paper, hydrophile cotton and agar-water medium. Water absorption by seeds was assessed for 3, 6, 9, 24, 48 and 72h and, later, at 21 days of cultivation and contamination by microorganisms was determined. Water absorption, based on the percentage increase which occurred in the weight of seeds, was higher in filter paper and hydrophile cotton. The best germination rates were obtained with filter paper and agar-water. However, agar-water presented the highest contamination rates. Due to water loss in the substrate filter-paper during cultivation, it is suggested the use of cotton because of the low contamination rates observed.
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Authors ;Diego Pascoal Golle;Lia Rejane Silveira Reiniger;Marlove Fátima Brião Muniz;Aline Ritter Curti;Felippe Corrêa da Rosa
Journal Trials
Year 2009
DOI
DOI not found
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000700043
Keywords
tissue culture

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