Difference in Selenium Accumulation in Shoots of Two Rice Cultivars

doi:10.1016/S1002-0160(06)60098-2

Pedosphere

Volume 16, Issue 5, October 2006, Pages 646-653

https://doi.org/10.1016/S1002-0160(06)60098-2 Get rights and content

ABSTRACT

Two japonica rice (Oryza sativa L.) cultivars, Xiushui 48 and S. Andrea, differing in their ability to accumulate Se in the grain (as high as a three-fold difference), were compared for selenium (Se) accumulation in their shoots when their growth media was supplied with different forms of Se. Results indicated that when treated with 0.25 μmol L⁻¹ Na₂SeO₃, Xiushui 48 accumulation of Se in the shoots was significantly more rapid (P ≤ 0.05) than S. Andrea, probably because of greater Se uptake and transport in Xiushui 48. Xiushui 48 rice seedlings had a higher shoot-Se accumulation rate and absorbed selenocysteine (Se-Cys) more rapidly than S. Andrea seedlings. However, when treated with Se as 0.25 μmol L⁻¹ selenomethionine (Se-Met), the S. Andrea seedlings' accumulation rate was significantly greater (P ≤ 0.05) than that of Xiushui 48. Possibly, the high Se accumulation rate of Xiushui 48 seedling shoots compared to S. Andrea shoots was the result of a higher capacity of Xiushui 48 to transform selenite to organic Se compounds and a higher selenite uptake rate.

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Some research has been done in order to increase Se contents in rice grain by foliar spraying methods (Fang et al., 2008; Hu, Chen, Xu, Zhang, & Pan, 2002). However, these methods were associated with high costs and potential environmental problems (Zhang, Shi, & Wang, 2006a, 2006b). Therefore, finding an alterative is essential.
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¹: Project supported by the National Natural Science Foundation of China (No. 40371063) and the National Key Basic Research Support Foundation of China (No. G1999011808).

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Difference in Selenium Accumulation in Shoots of Two Rice Cultivars1

ABSTRACT

Environment International

Talanta

Food Chemistry

Phytochemistry

Plant Sci. Lett.

Applied Geochemistry

J. Plant Physiol.

Uptake kinetics of arsenic species in rice plants

Plant Physiol

Selenomethionine uptake by wheat seedlings

Agron. J.