title: Axonopus compressus (Sw.) Beauv.: A potential biomonitor for molybdenum in soil pollution.
abstract: Phytoremediation is an emerging technology that utilizes plants to remediate contaminated environments. In this study, Axonopus compressus (Sw.) Beauv, a fast-growing and hardy groundcover with wide geographical distribution, was exposed to soil Mo treatments ranging from 100 to 1000 mg/kg under tropical greenhouse conditions for five weeks. Generally, Mo accumulation increased as the concentration of Mo in the soil increased. The species was found to accumulate about 4000 mg/kg of Mo without exhibiting severe physiological stress at 600 mg/kg of soil Mo. Maximum accumulation of 6000 mg/kg Mo was observed at the 1000 mg/kg soil Mo treatment, though with severe necrosis and eventual plant mortality. The physiological observations, Mo accumulation behavior, and a bioconcentration factor of about 1 indicated that A. compressus could be a potential biomonitor of Mo.
authors.affiliation: a Academic Group of Natural Sciences and Science Education, Nanyang Technological University , Singapore.
authors.forename: Shi Wan Tiffany
authors.initials: SWT
authors.lastname: Tow
authors.affiliation: b School of Biological Sciences, Nanyang Technological University , Singapore.
authors.forename: Zhi Xian
authors.initials: ZX
authors.lastname: Eng
authors.affiliation: b School of Biological Sciences, Nanyang Technological University , Singapore.
authors.forename: Seok Peng
authors.initials: SP
authors.lastname: Wong
authors.affiliation: c Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University , Singapore.
authors.forename: Liya
authors.initials: L
authors.lastname: Ge
authors.affiliation: a Academic Group of Natural Sciences and Science Education, Nanyang Technological University , Singapore.
authors.forename: Swee Ngin
authors.initials: SN
authors.lastname: Tan
authors.affiliation: d Singapore University of Technology and Design , Singapore.
authors.forename: Jean Wan Hong
authors.initials: JWH
authors.lastname: Yong
mesh_terms: D001673:Biodegradation, Environmental; D008982:Molybdenum; D006109:Poaceae; D012987:Soil; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D008982:Molybdenum
keywords: Accumulation; Poaceae; biomonitor; cow grass; molybdenum; phytoremediation