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Journal of Zhejiang University SCIENCE B 2011 Vol.12 No.5 P.408-418

http://doi.org/10.1631/jzus.B1000291


Characterization of 68Zn uptake, translocation, and accumulation into developing grains and young leaves of high Zn-density rice genotype


Author(s):  Chun-yong Wu, Ying Feng, Md. Jahidul Islam Shohag, Ling-li Lu, Yan-yan Wei, Chong Gao, Xiao-e Yang

Affiliation(s):  MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China

Corresponding email(s):   xyang571@yahoo.com

Key Words:  Zinc, Stable isotope, High Zn-density rice genotype, Translocation, Remobilization


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Chun-yong Wu, Ying Feng, Md. Jahidul Islam Shohag, Ling-li Lu, Yan-yan Wei, Chong Gao, Xiao-e Yang. Characterization of 68Zn uptake, translocation, and accumulation into developing grains and young leaves of high Zn-density rice genotype[J]. Journal of Zhejiang University Science B, 2011, 12(5): 408-418.

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author="Chun-yong Wu, Ying Feng, Md. Jahidul Islam Shohag, Ling-li Lu, Yan-yan Wei, Chong Gao, Xiao-e Yang",
journal="Journal of Zhejiang University Science B",
volume="12",
number="5",
pages="408-418",
year="2011",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1000291"
}

%0 Journal Article
%T Characterization of 68Zn uptake, translocation, and accumulation into developing grains and young leaves of high Zn-density rice genotype
%A Chun-yong Wu
%A Ying Feng
%A Md. Jahidul Islam Shohag
%A Ling-li Lu
%A Yan-yan Wei
%A Chong Gao
%A Xiao-e Yang
%J Journal of Zhejiang University SCIENCE B
%V 12
%N 5
%P 408-418
%@ 1673-1581
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1000291

TY - JOUR
T1 - Characterization of 68Zn uptake, translocation, and accumulation into developing grains and young leaves of high Zn-density rice genotype
A1 - Chun-yong Wu
A1 - Ying Feng
A1 - Md. Jahidul Islam Shohag
A1 - Ling-li Lu
A1 - Yan-yan Wei
A1 - Chong Gao
A1 - Xiao-e Yang
J0 - Journal of Zhejiang University Science B
VL - 12
IS - 5
SP - 408
EP - 418
%@ 1673-1581
Y1 - 2011
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1000291


Abstract: 
zinc (Zn) is an essential micronutrient for humans, but Zn deficiency has become serious as equally as iron (Fe) and vitamin A deficiencies nowadays. Selection and breeding of high Zn-density crops is a suitable, cost-effective, and sustainable way to improve human health. However, the mechanism of high Zn density in rice grain is not fully understood, especially how Zn transports from soil to grains. Hydroponics experiments were carried out to compare Zn uptake and distribution in two different Zn-density rice genotypes using stable isotope technique. At seedling stage, IR68144 showed higher 68Zn uptake and transport rate to the shoot for the short-term, but no significant difference was observed in both genotypes for the long-term. Zn in xylem sap of IR68144 was consistently higher, and IR68144 exhibited higher Zn absorption ratio than IR64 at sufficient (2.0 µmol/L) or surplus (8.0 µmol/L) Zn supply level. IR64 and IR68144 showed similar patterns of 68Zn accumulation in new leaves at seedling stage and in developing grains at ripening stage, whereas 68Zn in new leaves and grains of IR68144 was consistently higher. These results suggested that a rapid root-to-shoot translocation and enhanced xylem loading capacity may be the crucial processes for high Zn density in rice grains.

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