数字农科院2.0

Effects of Water Isotope Composition on Stable Isotope Distribution and Fractionation of Rice and Plant Tissues

文献类型： 外文期刊

作者： Zhang, Menglin;Li, Chunlin;Liu, Yiming;Zhang, Yongzhi;Nie, Jing;Shao, Shengzhi;Mei, Hanyi;Rogers, Karyne M.;Zhang, Weixing;Yuan, Yuwei

作者机构：

关键词： rice;water;stable isotopes;fractionation;correlation

期刊名称： JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

ISSN： 0021-8561

年卷期： 2024 年

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Rice origin authenticity is important for food safety and consumer confidence. The stable isotope composition of rice is believed to be closely related to its water source, which affects its origin characteristics. However, the influence of water availability on the distribution of rice stable isotopes (delta H-2 and delta O-18) is not clear. In this study, three irrigation waters with different isotopic values were used to investigate isotopic water use effects of Indica and Japonica rice, using pot experiments. Under three different water isotope treatments, the delta H-2 values of Indica polished rice showed significant differences (-65.0 +/- 2.3, -60.5 +/- 0.8 and -55.8 +/- 1.7 parts per thousand, respectively, p < 0.05) compared to delta C-13 and delta N-15, as did Japonica polished rice. The values of delta H-2 and delta O-18 of rice became more positive when applying more enriched (in H-2 and O-18) water, and the enrichment effect was higher in rice than in the corresponding plant tissue. In addition, the delta H-2 and delta O-18 values of Indica rice leaves decreased at the heading stage, increased at the filling stage, and then decreased at the harvest stage. Japonica rice showed a similar trend. delta H-2 changes from stem to leaf were more negative, but delta O-18 changes were more positive, and delta H-2 and delta O-18 values from leaf to rice were more positive for both brown and polished rice. The results from this study will clarify different water isotopic composition effects on rice and provide useful information to improve rice origin authenticity using stable isotope-based methods.

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