title: Discriminative study of a potato (Solanum tuberosum L.) cultivation region by measuring the stable isotope ratios of bio-elements.
abstract: Compared to other foods, the use of common bio-elements to identify the geographical origin of potato remains limited. Thus, this study aimed to verify whether the cultivation regions of raw potato tubers could be determined by the stable isotope composition analysis of bio-elements. δ(13)CVPDB and δ(15)NAIR in potato were influenced by region and cultivar, whereas δ(18)OVSMOW and δ(34)SVCDT were only influenced by region (p<0.0001). A two-dimensional plot of δ(18)OVSMOW and δ(34)SVCDT effectively distinguished between high and low altitude regions, and also reliably discriminated Wanju, Haenam, and Boseong cultivars in low altitude regions. δ(34)SVCDT was the main component that was responsible for the separation of samples in the principal component analysis (eigenvector of -0.6209) and orthogonal projection to latent structure-discriminant analysis (VIP value of 1.0566). In conclusion, this study improves our understanding of how the isotope composition of potato tubers varies with respect to cultivation regions and cultivars.
authors.affiliation: Department of Applied Bioscience, College of Life and Environmental Science, Konkuk University, Seoul 143-701, Republic of Korea.
authors.forename: Ill-Min
authors.initials: IM
authors.lastname: Chung
authors.affiliation: Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon 406-772, Republic of Korea.
authors.forename: Jae-Kwang
authors.initials: JK
authors.lastname: Kim
authors.affiliation: Highland Agriculture Research Institute, National Institute of Crop Science, RDA, Pyeongchang 232-955, Republic of Korea.
authors.forename: Yong-Ik
authors.initials: YI
authors.lastname: Jin
authors.affiliation: Department of Applied Bioscience, College of Life and Environmental Science, Konkuk University, Seoul 143-701, Republic of Korea.
authors.forename: Yong-Taek
authors.initials: YT
authors.lastname: Oh
authors.affiliation: Department of Applied Bioscience, College of Life and Environmental Science, Konkuk University, Seoul 143-701, Republic of Korea.
authors.forename: Mayakrishnan
authors.initials: M
authors.lastname: Prabakaran
authors.affiliation: Department of Applied Bioscience, College of Life and Environmental Science, Konkuk University, Seoul 143-701, Republic of Korea.
authors.forename: Kyoung-Jin
authors.initials: KJ
authors.lastname: Youn
authors.affiliation: Department of Applied Bioscience, College of Life and Environmental Science, Konkuk University, Seoul 143-701, Republic of Korea. Electronic address: kshkim@konkuk.ac.kr.
authors.forename: Seung-Hyun
authors.initials: SH
authors.lastname: Kim
mesh_terms: D000531:Altitude; D018556:Crops, Agricultural; D007554:Isotopes / Q000032:analysis*; D035281:Plant Tubers; D011198:Solanum tuberosum / Q000254:growth & development*
chemical_list: D007554:Isotopes
keywords: Bio-element; Chemometrics; Cultivation origin; Potato tuber; Stable isotope