Physico-chemical characterization of starches extracted from potatoes of the group Phureja

Caceres Marleny, Mestres Christian, Pons Brigitte, Gibert Olivier, Amoros Walter, Salas Elisa, Dufour Dominique, Bonierbale Merideth, Pallet Dominique. 2012. Physico-chemical characterization of starches extracted from potatoes of the group Phureja. Starch - Stärke, 64 (8) : 621-630.

Quartile : Q3, Sujet : FOOD SCIENCE & TECHNOLOGY

Résumé : Starch was extracted from twenty-four accessions of Group Phureja cultivated diploid potatoes, and from two commercial potato (Solanum tuberosum) varieties. Extracted starch samples were characterized and compared to industrial potato starch. Starch from Phureja generally exhibited smaller granule sizes and lower phosphorus content than starch from commercial potatoes. Amylose content and thermal properties (gelatinization temperature and enthalpy) were however in the same range for both groups. Starches from Phureja displayed very distinct pasting behavior from that of commercial potato. The former exhibited lower initial pasting viscosity but higher shear resistance. This may be related to lower starch granule size, causing lower swelling power and solubility. Iodine complexation results seem to indicate that phureja potatoes have higher proportion of amylopectin long chains. Phureja thus appears to be a promising new source of starch with specific physico-chemical and functional properties intermediate between industrial potato and cereal starches.

Mots-clés Agrovoc : Solanum phureja, Solanum tuberosum, amidon de pomme de terre, amidon, amylose, propriété technologique, propriété physicochimique

Mots-clés géographiques Agrovoc : Pérou

Classification Agris : Q04 - Composition des produits alimentaires
F60 - Physiologie et biochimie végétale

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Caceres Marleny, CIP (PER)
• Mestres Christian, CIRAD-PERSYST-UMR Qualisud (FRA)
• Pons Brigitte, CIRAD-PERSYST-UMR Qualisud (FRA)
• Gibert Olivier, CIRAD-PERSYST-UMR Qualisud (FRA) ORCID: 0000-0002-1447-9003
• Amoros Walter, CIP (PER)
• Salas Elisa, CIP (PER)
• Dufour Dominique, CIRAD-PERSYST-UMR Qualisud (COL) ORCID: 0000-0002-7794-8671
• Bonierbale Merideth, CIP (PER)
• Pallet Dominique, CIRAD-PERSYST-UMR Qualisud (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/565184/)

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