|
KMID : 0903619980390030287
|
|
Journal of the Korean Society for Horticultural Science
1998 Volume.39 No. 3 p.287 ~ p.290
|
|
|
Changes in Cell Wall Carbohydrates and Glycosidase Activity during Ripening of Tomato Fruits
|
|
김종기/Kim, Jong Kee
이승구/홍세진/Lee, Seung Koo/Hong, Se Jin
|
|
|
Abstract
|
|
|
|
The experiments were conducted to clarify mechanisms involved in hemicellulose degradation process of fruit cell wall during ripening using normal and ripening inhibitor (rin) tomatoes (Lycopersicon esculentum Mill). Galactose, glucose, and mannose were the predominant neutral sugars in isolated hemicellulose at all stages of ripening regardless of genetypes. Galactose and xylose decreased significantly during the ripening of normal tomato fiuit, as did mannose. The fruits of normal and rin tomatoes at each stage of ripening were analyzed for glycosidase activities. The activities present in appreciable amounts were β-galactosidase, β-glucosidase, and β-mannosidase in normal tomato fruit. The activities of α-galactosidase, α-glucosidase, and α-mannosidase in rin tomato fruit were undetectable or negligible during ripening. There were no activities of α-glucosidase and α-mannosidase in normal tomato fruit during ripening. The enzyme activities which affected cell wall degradation were higher in normal tomato fruit than those in rin tomato fruit. It was suggested that glycosidase contribute to fruit softening and changes in the activities of the enzymes may be strongly related to degradation of hemicellulose in cell wall.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|