Influence of harvest date on inulin chain length distribution and sugar profile for six chicory (Cichorium intybus L) cultivars
✍ Scribed by Koch, Kristine; Andersson, Roger; Rydberg, Ingrid; �man, Per
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 94 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0022-5142
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✦ Synopsis
The in¯uence of harvest date on inulin chain length distribution, as well as on the pro®le of glucose, fructose and sucrose of six different chicory cultivars previously not grown in the northern part of Europe was investigated. Inulin was extracted from both air-and freeze-dried chicory roots and analysed by means of high-performance anion-exchange chromatography with pulsed amperometric detection. Glucose, fructose and sucrose pro®les were calculated relative to the total content of these sugars and inulin. The highest weight average degree of polymerization (DP w ) for inulin was detected for the cultivars Bergues and Tilda (DP w 17.6). The longest average inulin chains for all cultivars were found when harvesting chicory during mid and late October, and a signi®cant decrease in DP w was observed for all cultivars in November in connection with the weather turning colder. Concomitantly, sucrose levels increased signi®cantly. Glucose and fructose levels were found to decrease until mid October and thereafter to increase slightly.