Data/hora: 06/06/2024 03:41:56

Provedor de dados: | 95
País: | Brazil
Título: | Desiccation tolerance of Tapirira obtusa seeds collected from different environments
Autores: | Pereira,Wilson Vicente Souza; Faria,José Márcio Rocha; Tonetti,Olivia Alvina Oliveira; Silva,Edvaldo Aparecido Amaral da.
Data: | 2012-01-01
Ano: | 2012
Palavras-chave: | Drying; Germination; Sensitivity; Dehydration.
Resumo: | This study was aimed at evaluating the desiccation sensitivity in seeds of the tree Tapirira obtusa (Benth.) J. D. Mitchell collected from three different environments and subjected to two distinct drying speeds. Seeds were collected from a rocky area, in the "Cerrado", and in a riparian forest area, in the region of municipality of Lavras, State of Minas Gerais. The seeds were subjected to drying with magnesium chloride (slow drying) or silica gel (fast drying), into closed environment, until moisture contents of 40%, 30%, 20% and 10%, considering as control, the percentage of germination at the initial moisture content in each environment, which varied from 47% to 50%. Percentages of germination and normal seedlings as well as germination speed index were assessed. For the three environments studied, there was no effect of slow drying on seed germination. Seeds from area of Cerrado, however, have shown a slight reduction on germination when subjected to fast drying. Oppositely, seeds from rocky area had germination increased when subjected to fast drying. Seeds from riparian forest area had no reduction on germination percentage, independent of drying speed. Results suggest that seeds of T. obtusa are not sensitive to desiccation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300005
Editor: | Associação Brasileira de Tecnologia de Sementes
Relação: | 10.1590/S0101-31222012000300005
Formato: | text/html
Fonte: | Revista Brasileira de Sementes  v.34 n.3 2012
Fonte: | info:eu-repo/semantics/openAccess