Effect of arsenic and manganese on root growth and cell division in root tip cells of green gram (Vigna radiate L.)

S Mumthas,Al Chidambaram,P Sundaramoorthy,K Ganesh

doi:10.9755/ejfa.v22i4.4876

Abstract

: Heavy metals are the metals having a density at least five times more than that of water. They are normally regarded as ones having an atomic number of 22-92.The effects of different concentration (5, 10, 25, 50 and 100 mg/l) of arsenic and manganese on germination, root growth and cell division in root tips of green gram (Vigna radiata.L) were studied. The inhibition of germination and root growth was noticed at higher concentrations of Arsenic and manganese. Arsenic had more toxic effect than manganese on the root tip cells of greengram during mitosis. Chromosome stickness implied the high toxicity of arsenic and manganese. The results also indicated that the germination percentage and root length was gradually decreased with the increasing concentration of both heavy metals.

Highlights

Environment is the combination of external physical conditions that affect and influence the growth, development, and survival of an organism, including air, water and soil
The control plants exhibit maximum percentage of germination and root growth when compared with all other concentrations (Table 1)
Heavy metals are one of the most important groups of pollutants of aquatic environment, which originate from domestic sewage, industrial effluents and agricultural run off etc

Summary

Introduction

Environment is the combination of external physical conditions that affect and influence the growth, development, and survival of an organism, including air, water and soil. In other words it is the combination of all the conditions external to the genome that potentially affect its expression and its structure. The problem of water pollution is getting greater dimension day by day in India. Water is mostly polluted by the industrial wastewaters released from various industries. Heavy metals are the main constituents of many industrial effluents. The industrial, agricultural and municipal wastes are the key sources of these toxic heavy metals in the wastewater (Kirupalakshmi, 2004)

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