도시 내 중금속 오염지의 관상식물로서 자생 맥문동(Liriope platyphylla)의 적용성 평가

Abstract

Heavy metal pollution is a widespread global problem causing serious environmental concern. Heavy metals such as Cd, Pb, and Zn can induce toxicity in all organisms if the soil levels of contaminants reach critical values. The aim of the present study was to examine the application of Liriope platyphylla, an ornamental Korean native plant with great potential for contaminated soil in urban areas, to determine tolerance for Cd, Pb, and Zn. Plants were grown in amended artificial soil with Cd, Pb, and Zn at 0, 100, 250, and for 7 months. The length of leaf, width of leaf, total leaf number, dead leaf number, new leaf number, chlorophyll contents, and ornamental value were monitored from May to August, during growth the period. The relative leaf length and leaf width displayed rapidly decreasing tendencies with an increasing Cd concentration beginning from 4 months after planting. The same decreasing tendency was observed in total leaf number, new leaf number, chlorophyll contents, and ornamental values showed a trend of Control> > > . In Pb concentration treatments, the relative leaf length and leaf width were significantly lower in plants grown at and as compared to the Control, . The total leaf number, new leaf number, and dead leaf number did not show significant difference among treatments in Control and but chlorophyll contents and ornamental value decreased with increasing Pb supply concentration treatments. However, in Zn supply treatments, the relative leaf length was higher at than the Control, , , but the relative leaf width decreased compared to the Control, , , and . The total leaf number, dead leaf number, new leaf number, and ornamental value showed the lowest value in plants grown in treatment but no significant differences were found among other treatments.