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当前位置: 首页 > 文章 > 不同温度与时间条件下狭叶香蒲吸收Cd~(2+)的动力学特征 江西农业学报 2008,20 (7) 43-45
Position: Home > Articles > Study on Cadmium Uptake Kinetics of Typha angustifolia under Different Time and Temperatures Acta Agriculturae Jiangxi 2008,20 (7) 43-45

不同温度与时间条件下狭叶香蒲吸收Cd~(2+)的动力学特征

作  者：
吴晓丽;徐迎春;赵艳;罗玉明
单  位：
江苏淮阴师范学院生物系;南京农业大学园艺学院
关键词：
狭叶香蒲;Cd2+;温度;时间;吸收动力学
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。
译  名：
Study on Cadmium Uptake Kinetics of Typha angustifolia under Different Time and Temperatures
作  者：
WU Xiao-li1,2,XU Ying-chun1,ZHAO Yan1,LUO Yu-ming3(1.College of Horticulture,Nanjing Agricultural University,Nanjing 210095,China;2.College of Agronomy,Ningxia University,Yinchuan 750021,China;3.Department of Biology,Huaiyin Normal College,Huaian 223300,China)
关键词：
Typha angustifolia;Cd2+;Temperature;Time;Uptake kinetics
摘  要：
The Cd2+ 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 Cd2+ absorption potentiality of T.angustifolia was strong,while the affinity at the uptake sites of root for Cd2+ was weak.The Cd2+ absorption rate increased under the short time and high temperature,when the treatment time prolonged,the Cd2+ 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 Cd2+ 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.

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