应用生态学报2018，Vol.29Issue(1)：278-284,7.DOI:10.13287/j.1001-9332.201801.033
水稻镉安全材料的镉吸收动力学特征
Characterization of cadmium uptake kinetics in cadmium pollution-safe rice material
摘要
Abstract
The characteristics of cadmium (Cd) uptake kinetics in a pollution-safe rice variety of D62B were studied in a hydroponic experiment under different Cd levels and stress time,with a common variety Luhui17 as the control.The results showed that Cd uptake in root of D62B was s ignificantly lower than that of Luhui17 under different stress times.The differences in Cd uptake of the two rice varieties increased with the extension of absorption time.Total Cd amount of Luhui17 was 1.3 times as much as that of D62B when the absorption time was 72 h.Meanwhile,the Cd uptake kinetic of the two varieties accorded to Michaelis-Menten equation,and little difference in Michaelis constants (Km) was observed in the two varieties.However,the maximum uptake rate (Vmax) of Luhui17 was 2 times as much as that of D62B.Once the stress time was more than 48 h,the transfer coefficients of D62B was lower than that of Luhui17,and the Cd distribution ratio in root of D62B was much higher,indicating that D62B had greater accumulation ability in root compared with Luhui17.In conclusion,the Cd uptake and transfer ability of D62B were lower than those of Luhui17.关键词
镉污染/水稻/吸收速率/米氏常数Key words
cadmium pollution/rice/uptake rate/Michaelis constant引用本文复制引用
郭静怡,张曼,张锡洲,李廷轩,张路,黄富,陈东明,孙先明..水稻镉安全材料的镉吸收动力学特征[J].应用生态学报,2018,29(1):278-284,7.基金项目
本文由国家科技支撑计划项目(2015BAD05B01)和四川省重点研发项目(2017SZ0188、2017SZ0198)资助 This work was supported by the National Science and Technology Support Program(2015BAD05801) and the Key Research Project of Sichuan Province (2017SZ0188,2017SZ0198). （2015BAD05B01）
