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| Study on the difference of cadmium absorption in five rice genotypes of Liaoning Province |
| Received:January 07, 2016 |
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| KeyWord:cadmium;genotype;rice;growth stage;absorption;subcellular distribution |
| Author Name | Affiliation | E-mail | | ZHANG Ru-de | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | LI Jun | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | QIN Li | College of Bioscience and Technology, Shenyang Agricultural University, Shenyang 110866, China | | | HAN Ying | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | MENG Bo | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | HUANG Yuan-cai | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China | hycai001@163.com |
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| Abstract: |
| In order to provide theoretical and practical basis for breeding rice varieties with high tolerance to cadmium and low accumulation, a pot experiment was conducted with five rice genotypes of Liaoning Province under soil exogenous cadmium added conditions. The cadmium accumulation in different parts of rice plant were investigated, meanwhile the contents and distribution in subcellular fractions of rice were analyzed to further reveal the mechanism. Results showed that, the cadmium content in each part of rice was increased with increasing cadmium amount and the differences were significant; there were significant differences in cadmium accumulation coefficients in grain of rice genotypes, there was a downward tendency of the cadmium accumulation coefficient with increasing cadmium amount, among which Shendao 47 and Liaojing 9 were relatively high, while Liaoxing 1, Shennong 15 and Shennong 315 were low, and Shennong 315 was the lowest under all treatments; the cadmium content in subcellular fractions of stem and leaf at heading stage was lower than that at tillering stage, the cell wall was the largest, the soluble part was the second, and the organelle is the smallest. The content and distribution proportion in subcelluar fractions of rice were different among genotypes and growing stages, cadmium content and distribution proportion in the cell wall and soluble part of cadmium tolerance rice variety Liaoxing 1, Shennong 15 and Shennong 315 were higher than those of sensitive varieties Shendao 47 and Liaojing 9, organelles were lower than sensitive varieties. |
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