Authors : K. Rezai and T. Farboodnia
Abstract: In this research the effects of 0, 25, 50, 100, 200 and 300 ppm of manganese concentration on Pisum sativum. L. (c.v.qazvin) plants growth, in nutrient solution (PH 5) on the controlled condition during 15 days have been studied. Maximum yields (dry weight of shoot and root) were obtained at 25 ppm manganese supplied in nutrient solution in comparasion with controls. The shoot/root weight ratio (SRW) showed decrease with increasing manganese in nutrient solution, this decrease in (SRW) confirmed that in toxic levels of manganese shoot have been more affected than roots of pea plant. Length of shoots and roots were retarded below and above 25 ppm of manganese supplied in nutrient solution. Manganese content in young and old leaves and roots of pea plants were determined. The distribution pattern of manganese in 5 treatments was different. Old leaves had the highest, while the young leaves had the lowest manganese content. In all treatments manganese uptake has been increased proportionally with manganese concentration in nutrient solution. Excess manganese above 50 ppm in nutrient solution has caused to unfavorable symptoms including chlorotic (yellowed) areas, brown and necrotic spots and decrease in plant size.
K. Rezai and T. Farboodnia , 2008. The Response of Pea Plant (Pisum sativum) to Manganese Toxicity in Solution Culture. Agricultural Journal, 3: 248-251.