Seasonal fluctuations of some sucrose metabolizing enzymes and sugar andorganic acid contents in broccoli

This study investigated the seasonal fluctuations in invertase, sucrosesynthase (SS) and sucrose phosphate synthase (SPS) activities and sugar andorganic acid contents in the florets and branchlets of two broccoli cultivars'Hartland' and 'Sairin' harvested from October to April....

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Bibliographic Details
Published inAsian Journal of Plant Sciences (Pakistan) Vol. 3; no. 5
Main Author Pramanik, B.K.,Kagawa Univ. (Japan). Dept. of Bioresource Production)Matsui, T
Format Journal Article
LanguageEnglish
Published 2004
Subjects
BRASSICA OLERACEA
PROXIMATE COMPOSITION
SEASONAL
VARIETIES
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Summary:This study investigated the seasonal fluctuations in invertase, sucrosesynthase (SS) and sucrose phosphate synthase (SPS) activities and sugar andorganic acid contents in the florets and branchlets of two broccoli cultivars'Hartland' and 'Sairin' harvested from October to April. In both, cultivars andportions, invertase (soluble and cell wall-bound fraction) and SS activitieswere high in October thereafter decreasing until January and once againgradually increasing up to April. In both cultivars, there was no specificchange in SPS activity throughout the harvest season but the activity washigh in January. Organic acids (malic and citric) and sugar (specially,sucrose) concentrations increased from October to a maximum in January andagain decreased up to April. However, no significant change was observed inglucose and fructose. There was a highly significant negative correlationobserved between invertase and SS activities and sucrose content in theflorets and branchlets of both cultivars. 'Sairin' showed higher invertase, SSand SPS activities in both florets and branchlets than 'Hartland'.
Bibliography:F60
2005000174
ISSN:1682-3974