Lantara Camara L., plant accumulating lead from soils for decontamination

Abstract

From the different contaminated soils, some plants were determined to be able to a like Heterostrema villosum. L. Asclepiadaceae, trứng cá Muntingia calabura, Vetiver Vetiveria zizanoides Poaceae.Among them, Lantana camara L. Verbenaceae is able to accumulate the Pb like more than 1.7x103 mg kg-1 Pb in the roots, a physiological trait which may be exploited for phytoremediation of contaminated soils. There had a good correlation between lead concentration in soil and the lead accumulation in root system of Lantana. In the control, root lead content was 0.4 mg kg-1. In soils with lead content was 1x103 mg kg-1, there were no damage on growth, plants are able to accumulate 0.4x103 mg kg-1 DW Pb in the root. In the soils were treated successively by lead acetate content of 1x103 mg kg-1 in each two weeks, after 7 treatments, the soils were accumulated gradually 7x103 mg kg-1, growth were not significantly different between plants growing in the presence or absence of lead; plants are able to accumulate 1.7x103 mg kg-1 DW Pb in roots, more than 4400 times. Lantana can supply great biomass after 105 days with an increasing about 15 times of dry biomasse. This study on Lantana camera L. provides the first comprehensive on growth characteristics in polluted soils and their capacity of lead accumulation to add in the plant material list used for researches and phytoremediation applications.