title: Chemical composition of some wild peanut species (Arachis L.) seeds.
abstract: Oil, protein, ash, and carbohydrate contents, iodine value, and fatty acid and sterol compositions were studied in seeds of Arachis trinitensis, A. chiquitana, A. kempff-mercadoi, A. diogoi, A. benensis, A. appressipila, A. valida, A. kretschmeri, A. helodes, A. kuhlmannii, A. williamsii, A. sylvestris, A. matiensis, A. pintoi, A. hoehnei, A. villosa, and A. stenosperma. Oil content was greatest in A.stenosperma (mean value = 51.8%). The protein level was higher in A. sylvestris (30.1%) and A. villosa (29.5%). Mean value of oleic acid varied between 30.6% (A. matiensis) and 46.8% (Arachis villosa), and linoleic acid oscillated between 34.1% (A. villosa) and 47.4% (A. appressipila). The better oleic-to-linoleic (O/L) ratio was exhibited by A. villosa (1.38). Some species showed higher concentration of behenic acid. The greatest level of this fatty acid was found in A. matiensis (6.2%). Iodine value was lower in A. valida (99.2). The sterol composition in the different peanut species showed higher concentration of beta-sitosterol (mean values oscillated between 55.7 and 60.2%) followed by campesterol (12.4-16. 5%), stigmasterol (9.7-13.3%), and Delta(5)-avenasterol (9.7-13.4%). The chemical quality and stability of oils (iodine value and O/L ratio) from wild peanut studied in this work are not better than those of cultivated peanut.
authors.affiliation: Química Biológica, Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba, Av. Valparaíso s/n, CC 509, 5000 Córdoba, Argentina. nrgrosso@agro.uncor.edu
authors.forename: N R
authors.initials: NR
authors.lastname: Grosso
authors.forename: V
authors.initials: V
authors.lastname: Nepote
authors.forename: C A
authors.initials: CA
authors.lastname: Guzmán
mesh_terms: D010367:Arachis / Q000737:chemistry* / Q000235:genetics; D002241:Carbohydrates / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D006801:Humans; D007455:Iodine / Q000032:analysis; D010938:Plant Oils / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis; D012639:Seeds / Q000737:chemistry* / Q000235:genetics; D013261:Sterols / Q000032:analysis
chemical_list: D002241:Carbohydrates; D005227:Fatty Acids; D010938:Plant Oils; D010940:Plant Proteins; D013261:Sterols; D007455:Iodine