Uptake and accumulation of copper by roots and shoots of maize(Zea may L.)

The effects of different concentrations of copper sulfate on rootand shoot growth of maize(Zea mays L.) and the uptake and accumulation of Cu2+ by its roots and shoots were investigated in the present study. The concentrations of opper sulfate (CuSO4.5H2O) used were in the range of 10-5-10-3mol/L. Root growth decreased progressively with increasing concentration of Cu2+ in solution. The seedlings exposed to 10-3 mol/L Cu exhibited substantial growth reduction, yielding only 68% of the root length of the control. The shoot growth of the seedlings grown at 10-5-10-4 mol/L Cu2+ were more or less than the same as the control seedlings. The leaves treated with 10-3 mol/L Cu2+ were obviously inhibited in shoot growth. The fresh and dry weights both in roots and shots decreased progressively with increasing Cu2+ concentration.This fits well with the above mentioned effects of copper sulfate on root growth. Zea mays has considerable ability to remove Cu from solutions and accumulate it. The Cu content in roots of Z. Mays increased with increasing solution concentration of Cu2+. The amount of Cu in roots of plants treated with 10-3, 10-4 and 10-5 mol/L Cu2+ were 10, 8 and 1.5 fold, respectively, greater than that of roots of control plant. However, the plants transported and concentrated only a small amount of Cu in their shoots.

作 者： LIU Dong-hua JANG Wu-sheng HOU Wen-qiang   作者單位： LIU Dong-hua(Department of Biology,College of Chemistry and Life Sciences,Tianjin Normal University,)

JANG Wu-sheng(Library, Tianjin Normal University,)

HOU Wen-qiang(College of Life Sciences, Nankai University,) 

刊 名： 環境科學學報(英文版)  ISTIC SCI 英文刊名： ENVIRONMENTAL SCIENCES  年，卷(期)： 2001 13(2)  分類號： X172  關鍵詞：  

【Uptake and accumulation of copper by】相關文章：

Accumulation and ultrastructural distribution of copper in Elsholtzia splendens04-26

Growth and phosphate uptake kinetics of Microcystis aeruginosa under various environmental conditions04-26

Synthesis and Crystal Structure of Binuclear Copper(Ⅱ)Complex Containing (Dimethylaminomethyl)ferrocene04-27

Effects of methamidophos and glyphosate on copper sorption-desorption behavior in soils04-25

Accumulation of heavy metals in four grasses grown on lead and zinc mine tailings04-25

Electrochemical remediation of copper contaminated kaolinite by conditioning anolyte and catholyte pH simultaneously04-26

Electrokinetic removal of chromium and copper from contaminated soils by lactic acid enhancement in the catholyte04-25

Factors affecting the accumulation of 9-methoxycanthin-6-one in callus cultures of Eurycoma longifolia04-26

Effects of seawater salinity on nitrite accumulation in short-range nitrification to nitrite as end product04-26

Effects of seawater salinity on nitrite accumulation in short-range nitrification to nitrite as end product04-26