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Title: The metabolism of fructans in roots of Cichorium intybus during growth, storage and forcing
Authors: Van den Ende, Wim ×
Mintiens, A
Speleers, H
Onuoha, AA
Van Laere, André #
Issue Date: Apr-1996
Publisher: Wiley-Blackwell Publishing Ltd.
Series Title: New Phytologist vol:132 issue:4 pages:555-563
Abstract: During the 1993 growing season samples from field-grown roots of chicory (Cichorium intybus L. var. foliosum cv. Flash) were analysed by ion-exchange HPLC (Dionex). We measured the concentrations (mu mol g(-1) f. wt) of glucose, fructose, sucrose, 1-kestose and 1,1 nystose. The concentrations of the higher fructans were relative (units g(-1) f. wt). The data showed a significant increase in the concentration of fructans with a high degree of polymerization (DP) during July, August and September and a decrease of the glucose concentration. The concentrations of sucrose, fructose and oligomeric fructans remained roughly constant over the same period. However, in early October, important changes occurred over a very short period. These changes included: (1) a significant increase in fructose concentration; (2) an increase in the concentration of fructans with a low DP; (3) a decrease in fructans with a high DP; (4) an appearance-of alternative peaks (probably representing fructans without terminal glucose); and (5) an increase in sucrose concentration. These changes were not affected by a short-day treatment starting on 6 September. Forcing of the roots for endive production was accompanied by further breakdown, mainly of the larger fructans. Activity of SST (sucrose: sucrose fructosyl transferase) decreased slowly throughout the growing season to essentially disappear by October. Neutral invertase activity increased more gradually. SST activity decreased very rapidly during cold storage and forcing.
URI: 
ISSN: 0028-646X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Physiology of Plants and Micro-organisms Section - miscellaneous
× corresponding author
# (joint) last author

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