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Authenticity of rice ( Oryza sativa L.) geographical origin based on analysis of C, N, O and S stable isotope ratios: a preliminary case report in Korea, China and Philippine
Author(s) -
Chung IllMin,
Kim JaeKwang,
Prabakaran Mayakrishnan,
Yang JinHee,
Kim SeungHyun
Publication year - 2016
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.7363
Subject(s) - oryza sativa , principal component analysis , chemometrics , cultivar , oryza , crop , china , poaceae , agronomy , biology , geography , mathematics , chemistry , statistics , biochemistry , archaeology , chromatography , gene
BACKGROUND Although rice ( Oryza sativa L.) is the third largest food crop, relatively fewer studies have been reported on rice geographical origin based on light element isotope ratios in comparison with other foods such as wine, beef, juice, oil and milk. Therefore this study tries to discriminate the geographical origin of the same rice cultivars grown in different Asian countries using the analysis of C, N, O and S stable isotope ratios and chemometrics. RESULTS The δ 15 N AIR , δ 18 O VSMOW and δ 34 S VCDT values of brown rice were more markedly influenced by geographical origin than was the δ 13 C VPDB value. In particular, the combination of δ 18 O VSMOW and δ 34 S VCDT more efficiently discriminated rice geographical origin than did the remaining combinations. Principal component analysis ( PCA ) revealed a clear discrimination between different rice geographical origins but not between rice genotypes. In particular, the first components of PCA discriminated rice cultivated in the Philippines from rice cultivated in China and Korea. CONCLUSION The present findings suggest that analysis of the light element isotope composition combined with chemometrics can be potentially applicable to discriminate rice geographical origin and also may provide a valuable insight into the control of improper or fraudulent labeling regarding the geographical origin of rice worldwide. © 2015 Society of Chemical Industry