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研究论文

Differences of cadmium uptake by rice genotypes and relationship between the iron oxide plaque and cadmium uptake

摘要：采用琼脂培养方法, 模拟铁在不同基因型水稻根表的氧化与淀积, 研究了不同水稻吸镉的差异及其与根表铁氧化物胶膜的关系.结果表明:不同水稻基因型其根表淀积的铁氧化物数量存在显著性差异, 根表富集的镉量及根部、地上部含镉量均存在显著性差异, 且镉在不同水稻植株体内转移运输能力不同;不同水稻基因型根膜中的含铁量与根表铁氧化物富集的镉量、根部的含镉量、地上部的含镉量存在显著性直线相关.

Abstract：Differences of cadmium uptake by plants of rice genotypes and relationships between the concentration of Fe deposited on root surface and the concentration of cadmium in plants were studied in agar culture under controlled conditions. The results showed that there were differences in cadmium taken up by root and shoot, cadmium accumulated on root surface of different rice genotypes, the transportation of cadmium from root to shoot in different rice genotypes, and the amount of iron oxides deposited on the root surface of different rice genotypes. There was a significant correlation between the concentration of Fe deposited on root surface and the Cd accumulated on root surface, root and shoot of rice.