Cadmium Accumulation Characteristics of Eclipta prostrata L.

doi:10.7668/hbnxb.2014.03.039

Abstract

Abstract: In this study, we grew this plant in soil containing various concentrations of cadmium to further evaluate its cadmium accumulation characteristics.The results showed that the biomass, height, root length, chlorophyll SPAD value and the resistance coefficient decreased with the increase of cadmium concentration in soil, while the cadmium contents in root and shoot of E.prostrata increased.The cadmium contents in shoot and root of E.prostrata exceeded 100 mg/kg when the dose of cadmium was more than 50 mg/kg in soil, and the BCFs of root and shoot were greater than 1 and the TF was less than 1.The maximum of cadmium accumulation in shoot of E.prostrata was 38.06 μg/plant (The dose of cadmium was 25 mg/kg in soil). In the plot experiment, when cadmium concentrations of soil were 2.04-2.89 mg/kg, the cadmium accumulations in shoot of E.prostrata were 0.393-0.435 mg/m².Therefore, Eclipta prostrata L.is a Cd-accumulator plant with better capability and could be used to remediate Cd-contaminated farmland.

Key words: Eclipta prostrata L., Cadmium content, Characteristics of accumulation, Farmland weeds

CLC Number:

X503

LUO Li, LIN Li-jin, LIAO Ming-an, ZHANG Xiao, YANG Dai-yu. Cadmium Accumulation Characteristics of Eclipta prostrata L.[J]. journal1, 2014, 29(3): 216-220. doi: 10.7668/hbnxb.2014.03.039.

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http://www.hbnxb.net/EN/Y2014/V29/I3/216

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