Combination of High Zn Density and Low Phytic Acid for Improving Zn Bioavailability in Rice (Oryza stavia L.) Grain
文献类型： 外文期刊
作者： Wang, Yin 1 ; Meng, Yusha 1 ; Ma, Yanping 1 ; Liu, Lei 1 ; Wu, Dianxing 3 ; Shu, Xiaoli 3 ; Pan, Liqing 4 ; Lai, Qixian 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Rural Dev, Hangzhou 310021, Peoples R China
2.Minist Agr, Key Lab Creat Agr, Hangzhou 310021, Peoples R China
3.Zhejiang Univ, Inst Nucl Agr Sci, State Key Lab Rice Biol, Hangzhou 310029, Peoples R China
4.Yuyao Agr & Rural Bur, Yuyao Cty Agr Tech Promot & Serv Stn, Ningbo 315400, Peoples R China
关键词： Zinc (Zn); Bioavailability; Rice; Cross-breeding; Biofortification
期刊名称：RICE （ 影响因子：4.783； 五年影响因子：5.23 ）
ISSN： 1939-8425
年卷期： 2021 年 14 卷 1 期
页码：
收录情况： SCI
摘要： Background Zn deficiency is one of the leading public health problems in the world. Staple food crop, such as rice, cannot provide enough Zn to meet the daily dietary requirement because Zn in grain would chelate with phytic acid, which resulted in low Zn bioavailability. Breeding new rice varieties with high Zn bioavailability will be an effective, economic and sustainable strategy to alleviate human Zn deficiency. Results The high Zn density mutant LLZ was crossed with the low phytic acid mutant Os-lpa-XS110-1, and the contents of Zn and phytic acid in the brown rice were determined for the resulting progenies grown at different sites. Among the hybrid progenies, the double mutant always displayed significantly higher Zn content and lower phytic acid content in grain, leading to the lowest molar ratio of phytic acid to Zn under all environments. As assessed by in vitro digestion/Caco-2 cell model, the double mutant contained the relatively high content of bioavailable Zn in brown rice. Conclusions Our findings suggested pyramiding breeding by a combination of high Zn density and low phytic acid is a practical and useful approach to improve Zn bioavailability in rice grain.
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