Rehabilitation of artisanal small-scale gold mining land in West Lombok, Indonesia: 3. exploration of indigenous plant species and the associated mycorrhiza for phytomycoremediation of mercury contaminated soils

A study was carried out with the objective of identify the indigenous plant species and its associated mycorrhiza for phytomycoremediation of mercury contaminated tailing at Sekotong, Lombok of Indonesia. The study consisted of field and laboratory studies. The field study was done to identify and collect samples of plant species grown in the mining area, done with line intersect survey method. The laboratory analysis included asburcular mycorrhiza identification and analysis of the heavy metals in the tailing, soil, and plants. The results show that the association of mycorrhiza and plant species still exist in contaminated soil. Based on the its frequency, Hg content, and biomass energy, there were 6 plant species which have a good prospect for Hg clearance of tailing contaminated soil at Sekotong, Lombok, Indonesia, i.e. Cyperus kyllingia Endl., Dracontomelon dao (Blanco) Merr., Duabanga moluccana Blum., Erythrina orientalis L, Eugenia subglauca Koord. & Valeton. Lindernia crustacea (L.) F., Paraserianthes falcataria (L.) Nielsen., and Paspalum conjugatum L. Based on the occurrence mycorrhiza and spore density, Paspalum conjugatum L. associated with mycorrhiza is the most prospective to be developed for mycophytoremediation.