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Using Fe biofortification strategies to reduce both Ni concentration and oral bioavailability for rice with high Ni

文献类型： 外文期刊

作者： Lin, Xin-Ying 1 ; Liang, Jia-Hui 1 ; Jiao, Duo -Duo 2 ; Chen, Jun-Xiu 1 ; Wang, Ning 3 ; Ma, Lena Q. 4 ; Zhou, Dongmei 1 ; Li, Hong-Bo 1 ;

作者机构： 1.Nanjing Univ, Sch Environm, Jiangsu Key Lab Vehicle Emiss Control, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Peoples R China

2.Fujian Agr & Forestry Univ, Coll Resources & Environm Sci, Fuzhou 350002, Fujian, Peoples R China

3.Jiangsu Acad Agr Sci, Minist Agr & Rural Affairs Peoples Republ China, Key Lab Agroenvironm Downstream Yangtze Plain, Nanjing 210014, Jiangsu, Peoples R China

4.Zhejiang Univ, Coll Environm & Resource Sci, Inst Soil & Water Resources & Environm Sci, Hangzhou 310058, Peoples R China

关键词： Nickel; Iron; Rice; Oral bioavailability; Mice

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）

ISSN： 0304-3894

年卷期： 2023 年 452 卷

页码：

收录情况： SCI

摘要： Due to naturally high Ni or soil Ni contamination, high Ni concentrations are reported in rice, raising a need to reduce rice Ni exposure risk. Here, reduction in rice Ni concentration and Ni oral bioavailability with rice Fe biofortification and dietary Fe supplementation was assessed using rice cultivation and mouse bioassays. Results showed that for rice grown in a high geogenic Ni soil, increases in rice Fe concentration from-10.0 to-30.0 mu g g-1 with foliar EDTA-FeNa application led to decreases in Ni concentration from-4.0 to-1.0 mu g g-1 due to inhibited Ni transport from shoot to grains via down-regulated Fe transporters. When fed to mice, Fe-biofortified rice was significantly (p < 0.01) lower in Ni oral bioavailability (59.9 +/- 11.9% vs. 77.8 +/- 15.1%; 42.4 +/- 9.81% vs. 70.4 +/- 6.81%). Dietary amendment of exogenous Fe supplements to two Ni-contaminated rice samples at 10-40 mu g Fe g-1 also significantly (p < 0.05) reduced Ni RBA from 91.7% to 61.0-69.5% and from 77.4% to 29.2-55.2% due to down-regulation of duodenal Fe transporter expression. Results suggest that the Fe-based strategies not only reduced rice Ni concentration but also lowered rice Ni oral bioavailability, playing dual roles in reducing rice-Ni exposure.

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