New Zealand Journal of Crop and Horticultural Science abstracts

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Qualitative and quantitative development of carbohydrate reserves
during the biological cycle of Jerusalem artichoke (Helianthus tuberosus L.) tubers

M. BEN CHEKROUN
J. AMZILE
M. EL YACHIOUI
N. E. EL HALOUI

Biology Laboratory
Ibn Tofail University
School of Sciences
14000, Kenitra
Morocco

J. PREVOST

Laboratory of Plant Ecology
School of Sciences
123 Albert Thomas
87100, Limoges
France

Abstract  A dry matter (DM) assay along with a qualitative and quantitative carbohydrate study were conducted on two Jerusalem artichoke (Helianthus tuberosus L.) cultivars--`Kharkov' and `Violet de Rennes'. In addition to sucrose, glucose, and fructose, some inulin-type glucofructosans were detected at all stages of development of the tubers. The carbohydrate content was found to average from 65 to 80% DM. The tubers lose a fraction of their carbohydrates in winter--27.6% for `Kharkov' and 35.6% for `Violet de Rennes'.

Résumé  Un dosage de matière sèche (MS) ainsi qu'une étude qualitative et quantitative de glucides ont été effectués sur deux cultivars de Topinambour (Helianthus tuberosus L.), `Kharkov' et `Violet de Rennes'. En plus du saccharose, glucose et fructose, des glucofructosanes ont été détectées pendant les différents stades du développement des tubercules de Topinambour. Les glucides représentent 65 à 80% MS. Les tubercules perdent une fraction de leurs glucides en hiver, 27.6% pour le `Kharkov' et 35.6% pour le `Violet de Rennes'.

Keywords  fructan; fructose; glucofructosan; `Kharkov'; `Violet de Rennes'; Jerusalem artichoke; Helianthus tuberosus L.

PDF file of entire paper: medium quality (767K); (scanned from paper original: notes about this process)

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