Journal
FOOD CHEMISTRY
Volume 141, Issue 3, Pages 2864-2872Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2013.05.016
Keywords
Carotenoids; Solanum; Potato cultivars; Breeding; Xanthophyll esterification; Lutein; Zeaxanthin
Funding
- Ministerio de Ciencia e Innovacion (Spanish Government) [AGL2010-14850/ALI]
- Consejeria de Economia, Innovacion, Ciencia y Empleo (Junta de Andalucia) [P08-AGR-03477]
- FEDER funding
- JAE-Doc contract (CSIC)
- ESF
- CYTED [112RT0445]
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The carotenoid profile of sixty potato cultivars (commercial, bred, old and native cultivars) has been characterised in order to provide information to be used in selective breeding programs directed to improve the nutritional value of this important staple food. Cultivars were segregated into three groups according to the major pigment in the carotenoid profile: violaxanthin (37 cultivars; especially those with higher carotenoid content), lutein (16 cultivars), and neoxanthin (7 cultivars). Other minor carotenoids were antheraxanthin, beta-cryptoxanthin and beta-carotene, while zeaxanthin was absent in all sample. The total carotenoid content ranged from 50.0 to 1552.0 mu g/100 g dry wt, with an average value of about 435.3 mu g/100 g dry wt. Sipancachi, Poluya and Chaucha native cultivars showed the highest carotenoid content (1020.0, 1478.2 and 1551.2 mu g/100 g dry wt, respectively). Xanthophyll esters were present in most cultivars, mainly as diesterified forms, being observed a direct correlation between the carotenoid content and the esterified fraction, suggesting that the esterification process facilitates the accumulation of these lipophilic compounds within the plastids. Therefore, the presence of xanthophyll esters should be a phenotypic character to be included in the breeding studies, and more efforts should be dedicated to the understanding of the biochemical process leading to this structural modification of carotenoids in plants. (C) 2013 Elsevier Ltd. All rights reserved.
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