Interaction of Ph and Mn on Physiological Parameters of Brassica Oleracea L.

Abstract

In the present study, interaction of 4 levels of manganese (Mn2+) (0, 100, 200, and 400 mM) and 4 levels of pH (4.5, 5.5, 6.5, and 7.5) were investigated on some physiological parameters of Brassica oleracea L. after 30 days of growth (15 days treatment) in hydroponic culture. Results showed that with an increase in manganese concentration, soluble carbohydrates, protein, and ascorbate contents also increased in shoots and roots of Brassica oleracea L. However, higher concentration of manganese reduced soluble carbohydrates, protein and ascorbate contents in the same plant. As manganese concentration increased, catalase activity in roots and shoots was also remarkably increased. Moreover, root peroxidase activity at pH 4.5 increased with an increase in manganese concentration and this increase was highest at pH 4.5 and 400 mM manganese concentration.