RHIZOSPHERE EFFECT ON BIODEGRADATION OF POLLUTANTS

Abstract

This study was conducted to investigate the effect of the rhizosphere of corn and soybean plants on the mineralization of P-nitro phenol II PNP"., 2,4- dichlorophenoxy acetic acid "2,4-D" and glyphosate in clay loam and silty loam soils. The effect of corn and

soybean

exudates

root exudates as well as synthetic root

on the mineralization process were also

considered.

A modified model system was used for the

cultivaion of corn

and soybean seedlings under

laboratory

conditions.

PNP,2,4-D and Glyphosate were

applied at a concentration of lppm in the surface of the soils used. The mineralization of the three radiolabeled compounds was determined as the amount of 14 C02 evolved during the mineralization process. Corn

and soybean root exudates as well as synthetic root exudates were added to the surface of the soils under investigation and evoloved from the mineralization of PNP,2,4-D and glyphosate was measured over time of the experiments.