摘要
研究了狭叶香蒲对Cd2+的吸收动力学特征。结果表明,狭叶香蒲对Cd2+的吸收基本符合M ichaelis-Menten动力学模型;高温下狭叶香蒲对Cd2+吸收的内在潜力大,但根系吸收位点对Cd2+的亲和力较小;高温下短时间内对Cd2+的吸收速率较快,但随时间延长则变慢,低温下的表现正好与高温下的相反;用V-C图解法和LB图解两种方法求解的Vm ax均以24h+30℃处理的最大,而24 h+10℃处理的最小;时间和温度同时影响离子吸收;用两种方法求动力学参数,虽然分析结果有差异,但相关性均较好。
The Cd^2＋ uptake kinetic characteristics of Typha angustifolia under the conditions of different time and temperatures were studied. Results showed the characteristics of absorption basically followed the Michaelis - Menten model. At high temperature, the Cd^2＋ absorption potentiality of T. angustifolia was strong, while the affinity at the uptake sites of root for Cd^2＋ was weak. The Cd^2＋ absorption rate increased under the short time and high temperature, when the treatment time prolonged, the Cd^2＋ absorption rate got slower, while in low temperature the results were opposite. Using V - C and LB graphical approach method, the value of Vmax was the highest in the treatment of 24 h ＋ 30 ℃, while that in the treatment of 24 h ＋ 10 ℃ was the lowest. The results showed that the Cd^2＋ absorption rate was influenced by treatment time and temperature. By the two different ways, the results showed the difference of the uptake kinetic mechanisms was significant, but it related well.
出处
《江西农业学报》
CAS
2008年第7期43-45,共3页
Acta Agriculturae Jiangxi
基金
江苏省教育厅自然科学基金资助项目(02180009)
淮安市农业科技计划资助项目(0352)
