Data/hora: 03/06/2024 18:33:17

Provedor de dados: | 93
País: | Brazil
Título: | Temperature-dependent germination and endo-beta -mannanase activity in sesame seeds
Autores: | CARVALHO,PATRÍCIA GONÇALVES BAPTISTA DE; BORGHETTI,FABIAN; BUCKERIDGE,MARCOS SILVEIRA; MORHY,LAURO; FERREIRA FILHO,EDIVALDO XIMENES.
Data: | 2001-01-01
Ano: | 2001
Palavras-chave: | Endosperm; Germination rate; Sesame.
Resumo: | The effects of temperature on germination and endo-beta-mannanase activity in seeds of Sesamum indicum was investigated. The minimum germination temperature (Tmin) lies between 12.8°C and 13.2°C while the maximum temperature (Tmax) is located between 45.5°C and 46°C. Germinabilities are statistically not different from estimated viability (88%) between 18.8°C and 43.2°C. The Mann-Whitney test indicated the interval 31.9°C to 35.1°C as the optimum temperature (Topt) range for germination rate. When seeds incubated at temperatures at or below the Tmin and close to or above the Tmax were transferred to 30°C, those incubated at lower temperatures achieved high germinability. On the other hand, the higher the pre-incubation temperature above Tmax, the lower the germinability achieved near Topt. Seed endosperm cell wall was found to contain mannose as the main monosaccharide. An increase in endo-beta-mannanase activity in the micropylar endosperm prior to seed germination was observed only at supra-optimum temperature.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000200003
Editor: | Sociedade Brasileira de Fisiologia Vegetal
Relação: | 10.1590/S0103-31312001000200003
Formato: | text/html
Fonte: | Revista Brasileira de Fisiologia Vegetal  v.13 n.2 2001
Fonte: | info:eu-repo/semantics/openAccess