title: Impact of molecular structure on the physicochemical properties of starches isolated from different field pea (Pisum sativum L.) cultivars grown in Saskatchewan, Canada.
abstract: The objective of this study was to determine the molecular structure and properties of recently released cultivars of field peas [CDC Golden (CDCG), Abarth (ABAR), CDC Patrick (CDCP) and CDC Amarillo (CDCA)] grown at different locations in Saskatchewan, Canada. Starch yield (on whole seed basis), apparent amylose, total lipid and specific surface area were in the range 34-37%, 38.2-42.6%, 1.07-1.38% and 0.31-0.38m2/g, respectively. The proportion of short (DP 6-12) amylopectin chains, amylopectin branching density, molecular order, crystallinity, crystalline heterogeneity, gelatinization transition temperatures, pasting temperatures, peak viscosity, extent of acid hydrolysis, and resistant starch content were higher in CDCG and ABAR. However, amylopectin long chains (DP 13-26), average chain length and thermal stability were higher in CDCP and CDCA. The results of this study showed that differences in physicochemical properties among cultivars were mainly influenced by amylopectin chain length distribution, amylopectin branching density and co-crystallization of amylose with amylopectin.
authors.affiliation: Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada. Electronic address: rr7011@mun.ca.
authors.forename: R
authors.initials: R
authors.lastname: Raghunathan
authors.affiliation: Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Hoover
authors.affiliation: Guelph Food Research Centre, Agriculture and Agri-food Canada, Guelph, ON, N1G 5C9, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Waduge
authors.affiliation: Guelph Food Research Centre, Agriculture and Agri-food Canada, Guelph, ON, N1G 5C9, Canada. Electronic address: qiang.liu@agr.gc.ca.
authors.forename: Q
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Crop Development Centre, University of Saskatchewan, Saskatoon, SK S7N 5A8, Canada.
authors.forename: T D
authors.initials: TD
authors.lastname: Warkentin
mesh_terms: D000687:Amylopectin / Q000737:chemistry*; D000688:Amylose / Q000737:chemistry*; D006868:Hydrolysis; D015394:Molecular Structure; D018532:Pisum sativum / Q000737:chemistry*; D012525:Saskatchewan; D013213:Starch / Q000737:chemistry*; D013696:Temperature; D014783:Viscosity
chemical_list: D013213:Starch; D000688:Amylose; D000687:Amylopectin
keywords: Field pea starch; Properties; Structure