THE EFFECT OF ALUMINIUM ON CALCIUM AND MAGNESIUM UPTAKE AND TRANSLOCATION OF POTATO (SOLANUM TUBEROSUM L.)
Aluminium (Al3+) toxicity can cause inhibition of plant root growth and disturbance of its activity. Al3+ can cause displacement of cations such as calcium (Ca2+) and magnesium (Mg2+) from the apoplast of root cells and in addition can inhibit their uptake. The aim of this experiment was to investigate the effect of toxic levels of Al3+ on uptake and translocation of Ca2+ and Mg2+ of potato plants. Eleven potato cultivars were vegetatively grown in nutrient solutions having a pH 4.0 with three different levels of toxic aluminium (0.25, 0.5 and 1.0 mM Al3+ L-1), and control (without Al3+). After six days of growth, plants were divided into roots and shoots, and the concentrations of Al3+, Ca2+ and Mg2+ of potato roots and shoots were determined. Significant differences in concentrations of Al3+, Ca2+ and Mg2+ in both roots and shoots were found among potato cultivars grown on nutrient solutions with different levels of Al3+. The significantly highest concentrations of Al3+ in roots and shoots were determined in plants grown on nutrient solution with 1,0 mM Al3+ L-1, 27213 mg kg-1 of dry weight (DW) and 200.36 mg kg-1 DW, respectively. Concentrations of Ca2+ and Mg2+ in roots and shoots significantly decrease with increasing Al3+ concentrations in nutrient solutions, with lowest concentrations in plants grown on solution with 1.0 mM Al3+ L-1, 0.75% and 1.58% of Ca2+ and 0.55% and 0.46% of Mg2+ in roots and shoots, respectively.
Lazarević, B., Poljak, M. and Horvat, T. (2012). THE EFFECT OF ALUMINIUM ON CALCIUM AND MAGNESIUM UPTAKE AND TRANSLOCATION OF POTATO (SOLANUM TUBEROSUM L.). Acta Hortic. 960, 401-407
aluminium toxicity, potato cultivars, calcium, magnesium, root, shoot