ISSN:
1573-5036
Keywords:
Copper
;
Copper complex
;
Corn
;
Heavy metals
;
Nutrient solutions
;
Tetraethylenepentamine
;
Tetren
;
Zea mays L
;
Zinc
;
Zinc complex
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Complex formation of copper with tetraethylenepentamine (tetren) has some pronounced effects on the rate of uptake of the metal in corn, grown on nutrient solutions. At normal copper levels (0.02 ppm) in the medium, complex formation leads to a nearly hundredfold decrease in the rate of uptake, growth rate being slightly improved. Similar effects are observed at high copper levels (0.05 and 1 ppm) in which case the growth rate, severely affected in the absence of tetren, can be restored to normal values. High excess of tetren in the medium leads to copper-deficiency. Evidence is presented that the metal is taken up and translocated to the shoot as a metal complex and that its rate of translocation through the xylem is higher than for the aqueous ion. The effects in the case of zinc are similar although somewhat less marked.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02374749
