Study of Heavy Metals (Lead and Magnesium) Stress on Rosa indica

Abstract

In the present study, concentration effects of different heavy metals (Pb and Mg) in Rosa indica are observed to detect the changes in growth response due to effect of metal’s toxicity. Both metals have different tolerance index. Lead is toxic metal and has small tolerance index, whereas Mg is a macronutrient having a high tolerance index which can move in a large scale to different parts of the plants. The least and highest accumulation values of Pb and Mg were observed as 0.608-25.897 mg/L and 20948-52291 mg/L, respectively. The toxicity order in rose plant is Pb>Mg. The bio concentration and translocation factor values of Pb and Mg were 0.97, 0.77, 0.93 and 0.9 respectively. In lead polluted soil, plants height shown is declined due to the concentration of lead (66.38 cm-56.48 cm) whereas plant height increased because of massive concentrations of Mg (63.93 cm-75.03 cm). Results `revealed that accumulation of both metals were excessive in the roots and least in the stem and leaves. It is concluded that rose plant is a good accumulator of lead and magnesium.