生态环境学报2017，Vol.26Issue(12)：2140-2145,6.DOI:10.16258/j.cnki.1674-5906.2017.12.019
不同水稻品种对镉的吸收转运及其非蛋白巯基含量的变化
Uptake and Translocation of Cadmium and Content of Non-protein Thiols in Different Rice Cultivars
摘要
Abstract
Cadmium (Cd) is known as one of the five most toxic environment pollutants. It can be absorbed readily by crops and accumulated in human body through food chains, resulting in human body health problems. The accumulation of Cd in rice grains is a major agricultural problem in regions with Cd pollution. It is important to clarify the mechanism of Cd accumulation reduction in different cultivar rice on contaminated soil with cadmium. The experiment were conducted to investigate the uptake and translocation of cadmium and the contents of NPT (total non-protein thiol), GSH and other non-protein thiol [PC (phytochelatin)] in roots and leaves of four rice varieties with different grain Cd content under Cd stress. The results showed that the tested rice varieties grown in the soil polluted by cadmium, the contents of four varieties of grain rice were much higher than National secondary standard. The content of Cd was root>shoot>grain. The content of cadmium in indica rice grain was higher than that of japonica rice grain. The absorption and transportation of cadmium of four kinds of rice had the significant difference. The transfer factor of Cd with higher Cd concentration of grain was higher than that of low Cd rice cultivar. The content of NPT in root and shoot of Xiushui09 was higher than that of Xuda o5, but the content of NPT in leaves of Xiushui 09 was lower than that of Xuda o5. The content of higher cadmium in the root of Fengliangyou 1 was with higher NPT content, but the content of NPT in leaves was lower than that of Liangyou 6206. The content of GSH of japonica and indica rice grain with higher Cd was higher than rice grain with lower Cd in root, shoot and leave. The content of PC in Xiushui 09 with higher cadmium content was significantly higher than that with lower grain content. There was no significant difference in PC content between two rice varieties with different cadmium content in indica rice grain. The results show that the detoxification process of different rice varieties is different under cadmium stress, and the content of nonprotein is sensitive to cadmium pollution.关键词
不同水稻品种/镉含量/非蛋白巯基Key words
different rice varieties/cadmium/non-protein thiol分类
资源环境引用本文复制引用
李江遐,张军,马友华,高飞,蔡慢弟..不同水稻品种对镉的吸收转运及其非蛋白巯基含量的变化[J].生态环境学报,2017,26(12):2140-2145,6.基金项目
农业部农业生态环境保护项目(农财发[2013]16 号) （农财发[2013]16 号）
国家级大学生创新创业训练项目(201410364027) （201410364027）
安徽省教育厅重点项目(KJ2014A072) （KJ2014A072）
