Pedosphere 16(5): 646--653, 2006
ISSN 1002-0160/CN 32-1315/P
©2006 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Difference in selenium accumulation in shoots of two rice cultivars |
ZHANG Lian-He1,2 , SHI Wei-Ming1 and WANG Xiao-Chang3 |
1 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: zlianhe@eyou.com;
2 Agricultural College, Henan University of Science and Technology, Luoyang 471003 (China);
3 Department of Tea Science, Zhejiang University, Hangzhou 310029 (China) |
| ABSTRACT |
| Two japonica rice (Oryza saliva 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 0.25μmol 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. |
| Key Words: rice cultivars, Se accumulation, selenite, transport, uptake rate |
| Citation: Zhang, L. H., Shi, W. M. and Wang, X. C. 2006. Difference in selenium accumulation in shoots of two rice cultivars. Pedosphere. 16(5): 646-653. |
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