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| Genotypic Variation of Cd2+ Flux and Its Relationship with Cd Accumulation in Rice Plant |
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| KeyWord:rice; Cd2+ flux; Cd accumulation; genetic variation; vascular tissue |
| Author Name | Affiliation | | HAN Li-na | Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin 300387, China
Centre for Research in Ecotoxicology and Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191,China | | JU Xue-hai | Centre for Research in Ecotoxicology and Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191,China | | ZHANG Chang-bo | Centre for Research in Ecotoxicology and Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191,China | | SONG Zheng-guo | Centre for Research in Ecotoxicology and Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191,China | | WANG Jing-an | Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin 300387, China | | LIU Zhong-qi | Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin 300387, China
Centre for Research in Ecotoxicology and Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191,China |
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| Abstract: |
| Cadmium flux in plants varies among different genotypes. A study was conducted to measure the Cd2+ flux rate（CFR） in different root regions as well as vascular bundle tissues of roots and stems of four rice（Oryza Sativa） genotypes using a Non-invasive Micro-test Technique（NMT）. The CFR in rice roots had significant differences among different root regions and genotypes. It was obviously greater in the elongation region of root than in the root cap, root hair region and root hairs. Although the maximum CFR was over 2 time greater in vascular bundle tissue of root elongation region than in the epidermal cells of root, its variation among genotypes was not significant. However, the CFR in the vascular bundle tissues of stem showed a significant genotypic variation. The CFR in each part of the variety “T-you 705” was apparently higher and more stable than that in other genotypes, resulting in significantly higher Cd accumulations in roots and shoots of “T-you 705”. Therefore, the CFR in the vascular bundle tissues of roots and stems could be used as an accurate indicator of Cd transport and accumulation potential in rice varieties. |
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