Accumulation, mobilization, and transformation of selenium in rice grain provided with foliar sodium selenite

BACKGROUND Selenium is an indispensable trace element for humans and its deficiency can lead to serious health complications. Nearly 70% of the area of China faces selenium deficiency. To deal with this problem, selenium‐enriched rice has been increasingly incorporated into everyday diets. However,...

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Bibliographic Details
Published in:Journal of the science of food and agriculture 2019-04, Vol.99 (6), p.2892-2900
Main Authors: Farooq, Muhammad Umer, Tang, Zhichen, Zeng, Rui, Liang, Yuanke, Zhang, Yujie, Zheng, Tengda, Ei, Hla H, Ye, Xiaoying, Jia, Xiaomei, Zhu, Jianqing
Format: Article
Language:English
Subjects:
Biofortification
Biotransformation
China
Complications
Correlation analysis
Embryos
Fertilization
inorganic selenium
Leaves
Organic chemistry
organic selenium
Oryza - chemistry
Oryza - growth & development
Oryza - metabolism
Plant Leaves - chemistry
Plant Leaves - growth & development
Plant Leaves - metabolism
Rice
Seeds - chemistry
Seeds - growth & development
Seeds - metabolism
Selenium
Selenium - analysis
Selenium - metabolism
Se‐rich red rice
Sodium
Sodium selenite
Sodium Selenite - analysis
Sodium Selenite - metabolism
Trace elements
transformation
Translocation
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Summary:BACKGROUND Selenium is an indispensable trace element for humans and its deficiency can lead to serious health complications. Nearly 70% of the area of China faces selenium deficiency. To deal with this problem, selenium‐enriched rice has been increasingly incorporated into everyday diets. However, there is a lack of in‐depth studies of the absorption, translocation, and transformation of selenium in the different parts of the rice plant when sprayed with sodium selenite. RESULTS Foliar sodium selenite applied at critical growth stages can significantly improve the total and organic selenium content of plants. Application of 10 mg L−1 sodium selenite led to the most organic selenium (0.03 mg kg−1) in polished rice. Correlation studies of sodium selenite applied to leaves and other plant parts showed that total selenium accumulated most in glume, followed by rice bran, then polished rice, and finally embryo. The behavior of organic selenium was different. Organic selenium accumulated most in polished rice, then embryo, then rice bran, and finally glume. Moreover, 75–85% of the Se found in polished rice and embryo was organic in nature. CONCLUSIONS We propose that 10 mg L−1 sodium selenite can be recommended as appropriate for foliar fertilization in the organic selenium biofortification of Se‐free rice. © 2018 Society of Chemical Industry
ISSN:0022-5142
1097-0010
DOI:10.1002/jsfa.9502