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Variation of nitrate content among randomly selected taro (Colocasia esculenta (L.) Schott) genotypes and the distribution of nitrate within a corm

Kristl Janja, Ivancic Anton, Mergedus Andrej, Sem Vilma, Kolar Mitja, Lebot Vincent. 2016. Journal of Food Composition and Analysis.
Variation of nitrate content among randomly selected taro (Colocasia esculenta (L.) Schott) genotypes and the distribution of nitrate within a corm
ARTICLE, (2016 ) - PUBLISHEDVERSION - English (en-GB)
Journal of Food Composition and Analysis
OPENACCESS - Cirad license, https://agritrop.cirad.fr/mention_legale.html.
Audience : RESEARCHERS
Elsevier Inc.
Subject
Q04 - Composition des produits alimentaires, F60 - Physiologie et biochimie végétale, F30 - Génétique et amélioration des plantes, Colocasia esculenta, Taro, Rhizome, Propriété physicochimique, Nitrate, Variété, Génotype, Composition des aliments, Composition chimique, Chromatographie d'échange ionique, Développement biologique
Domains
Agriculture, Biologie, Sciences du vivant, Agronomie
Description
Taro (Colocasia esculenta) is an important staple crop distributed throughout many tropical and subtropical regions. Very little information is available about the nitrate content and its distribution within taro corms. The aim of this study, based on ion chromatography, was to analyze the concentration and distribution of nitrate within four crucial parts (upper, central, marginal, basal) of taro corms of 8 representative cultivars. The results revealed that the levels of nitrate in taro corms were variable depending on the cultivar and corm parts. The highest levels were determined in the upper part of the corm which is used for the multiplication and establishment of a new crop. Therefore, the size of this part is closely associated with the quality of the planting material. As there are no roots, the initial growth of the new taro plant depends entirely on the nutrients accumulated in the upper part of the corm. During the growth season, this part of the corm gradually becomes the lower (basal) part containing the oldest and the least biochemically active tissue, which has the lowest concentration of nitrate ions. The nitrate content in the central part, which is the most important for human nutrition, was relatively low and varied between 29 and 313 mg/kg fresh weight. (Résumé d'auteur)
Keywords
Colocasia esculenta, Taro, Corm, Nitrate content, Nitrate distribution, Food composition, Food analysis, Ion chromatography
Language
English (en-GB)
Creators
Kristl, Janja, Ivancic, Anton, Mergedus, Andrej, Sem, Vilma, Kolar, Mitja, Lebot, Vincent
Contributors
Sources
Journal of Food Composition and Analysis 47 (2016) 76–81
Coverage
Vanuatu
Name of newspaper
Journal of Food Composition and Analysis