Andean Potato Cultivars (Solanum tuberosum L.) as a Source of Antioxidant and Mineral Micronutrients
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- 作者：Christelle M. Andre ; Marc Ghislain ; Pierre Bertin ; Mouhssin Oufir ; Marí ; a del Rosario Herrera ; Lucien Hoffmann ; Jean-Franç ; ois Hausman ; Yvan Larondelle ; Daniè ; le Evers
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2007
- 出版时间：January 24, 2007
- 年：2007
- 卷：55
- 期：2
- 页码：366 - 378
- 全文大小：289K
- 年卷期：v.55,no.2(January 24, 2007)
- ISSN：1520-5118
文摘
Potato tubers were evaluated as a source of antioxidants and minerals for the human diet. A geneticallydiverse sample of Solanum tuberosum L. cultivars native to the Andes of South America was obtainedfrom a collection of nearly 1000 genotypes using microsatellite markers. This size-manageablecollection of 74 landraces, representing at best the genetic diversity among potato germplasm, wasanalyzed for iron, zinc, calcium, total phenolic, total carotenoid, and total vitamin C contents. Thehydrophilic antioxidant capacity of each genotype was also measured using the oxygen radicalabsorbance capacity (ORAC) assay. The iron content ranged from 29.87 to 157.96 
g g-1 of dryweight (DW), the zinc content from 12.6 to 28.83 g g-1 of DW, and the calcium content from 271.09to 1092.93 g g-1 of DW. Total phenolic content varied between 1.12 and 12.37 mg of gallic acidequiv g-1 of DW, total carotenoid content between 2.83 and 36.21 g g-1 of DW, and total vitaminC content between 217.70 and 689.47 g g-1 of DW. The range of hydrophilic ORAC values was28.25-250.67 mol of Trolox equiv g-1 of DW. The hydrophilic antioxidant capacity and the totalphenolic content were highly and positively correlated (r = 0.91). A strong relationship between ironand calcium contents was also found (r = 0.67). Principal component analysis on the studied nutritionalcontents of the core collection revealed that most potato genotypes were balanced in terms ofantioxidant and mineral contents, but some of them could be distinguished by their high level indistinct micronutrients. Correlations between the micronutrient contents observed in the sample andthe genetic distances assessed by microsatellites were weakly significant. However, this studydemonstrated the wide variability of health-promoting micronutrient levels within the native potatogermplasm as well as the significant contribution that distinct potato tubers may impart to the intakein dietary antioxidants, zinc, and iron.
g g-1 of dryweight (DW), the zinc content from 12.6 to 28.83 g g-1 of DW, and the calcium content from 271.09to 1092.93 g g-1 of DW. Total phenolic content varied between 1.12 and 12.37 mg of gallic acidequiv g-1 of DW, total carotenoid content between 2.83 and 36.21 g g-1 of DW, and total vitaminC content between 217.70 and 689.47 g g-1 of DW. The range of hydrophilic ORAC values was28.25-250.67 mol of Trolox equiv g-1 of DW. The hydrophilic antioxidant capacity and the totalphenolic content were highly and positively correlated (r = 0.91). A strong relationship between ironand calcium contents was also found (r = 0.67). Principal component analysis on the studied nutritionalcontents of the core collection revealed that most potato genotypes were balanced in terms ofantioxidant and mineral contents, but some of them could be distinguished by their high level indistinct micronutrients. Correlations between the micronutrient contents observed in the sample andthe genetic distances assessed by microsatellites were weakly significant. However, this studydemonstrated the wide variability of health-promoting micronutrient levels within the native potatogermplasm as well as the significant contribution that distinct potato tubers may impart to the intakein dietary antioxidants, zinc, and iron.