江西农业大学学报2012，Vol.34Issue(6)：1099-1104,6.
镉胁迫下不同耐性水稻植株幼苗生长和抗氧化酶的变化
Changes of Seedlings Growth and Antioxidant Enzyme Activities of Different Cd-tolerant Rice Cultivars under Cadmium Stress
摘要
Abstract
Different responses of seedlings growth and physiological characteristics in different cadmium -tolerant rice cultivars (Xiushui 63 and Xiushui 09) were studied with a hydroponic experiment under different Cd concentration(0, 1, 5, 10, 25, 50, 100 μmol/L). The results showed that the growth of rice seedlings was restrained significantly by the increase of Cd concentration and prolonged time. The inhibition rates of height, leaf dry weight and chlorophyll content in Xiushui 63 were greater that those in Xiushui 09. The content of MDA increased observably the stress of high concentration of Cd ( ≥50 μmol/L) for 3 days. With the prolonged time, Cd high than 10 μmol/L the content of MDA increased signficantly after Cd treatment for 9 days. The content of proline and activities of superoxide dismutase ( SOD) and peroxidase ( POD) increased under Cd stress. And they were more obvious in Xiushui 09 with the same concentration and the stress time. The activity of catalase( CAT) firstly increased and then decreased as the Cd concentration increased, and it was obviously lower in Xiushui 63 than that in Xiushui 09 at the level of ≥25 μmol/L. The experimental results showed that the higher content of proline and stronger activities of active oxygen scavenger enzyme in Xiushui 09 were the causes of its more tolerance to Cd stress than Xiushui 63.关键词
镉/水稻/耐性/抗氧化酶Key words
cadmium/ rice/ tolerance/ antioxidant enzyme分类
资源环境引用本文复制引用
陈会,任艳芳,陈秀兰,王阳阳,何俊瑜..镉胁迫下不同耐性水稻植株幼苗生长和抗氧化酶的变化[J].江西农业大学学报,2012,34(6):1099-1104,6.基金项目
国家自然科学基金项目(40901260)和贵州省自然科学基金项目(20122144) （40901260）
