ß-Glucanases in developing cotton (Gossypium hirsutum L.) fibres.
Planta
; 166(4): 530-6, 1985 Dec.
Article
em En
| MEDLINE
| ID: mdl-24241619
ABSTRACT
Cotton fibres possess several ß-glucanase activities which appear to be associated with the cell wall, but which can be partially solubilised in buffers. The main activity detected was that of an exo-(1â3)-ß-D-glucanase (EC 3.2.1.58) but which also had the characteristics of a ß-glucosidase (EC 3.2.1.21). Endo-(1â3)-ß-D-glucanase activity (EC 3.2.1.39) and much lower levels of (1â4)-ß-D-glucanase activity were also detected. The exo-(1â3)-ß-glucanase showed a maximum late on (40 days post-anthesis) in the development of the fibres, whereas the endo-(1â3)-ß-glucanase activity remained constant throughout fibre development. The ß-glucanase complex associated with the cotton-fibre cell wall also functions as a transglucosylase introducing, inter alia, (1â6)-ß-glucosyl linkages into the disaccharide cellobiose to give the trisaccharide 4-O-ß-gentiobiosylglucose.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Planta
Ano de publicação:
1985
Tipo de documento:
Article
País de afiliação:
Suíça
País de publicação:
ALEMANHA
/
ALEMANIA
/
DE
/
DEUSTCHLAND
/
GERMANY