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ISHS Acta Horticulturae 960: V Balkan Symposium on Vegetables and Potatoes

THE EFFECT OF ALUMINIUM ON CALCIUM AND MAGNESIUM UPTAKE AND TRANSLOCATION OF POTATO (SOLANUM TUBEROSUM L.)

Authors:   B. Lazarević, M. Poljak, T. Horvat
Keywords:   aluminium toxicity, potato cultivars, calcium, magnesium, root, shoot
DOI:   10.17660/ActaHortic.2012.960.57
Abstract:
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.

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