title: Effects of fulvic acid on the bioavailability of rare earth elements and GOT enzyme activity in wheat (Triticum aestivum).
abstract: Fulvic acid (FA) was extracted and purified from natural soil and the effects of such FA on the bioaccumulation of rare earth elements (REEs, La3+, Gd3+ and Y3+) in wheat seedling were investigated. The results indicated that low concentration of FA (<0.4 mg C/l to root, <0.7 mg C/l to tops (stem and leaves)) could increase the bioaccumulation values of REEs in wheat, but when the concentration of FA was high (>0.4 mg C/l to root, >1.5 mg C/l to tops) the bioaccumulation values were decreased. Kinetic experimental results suggested that bioaccumulation values of REEs in roots for 30 days were correlated with the kinetic linear growth equation, and correlation coefficients were higher than 0.861. The kinetic bioaccumulation pattern of REEs in tops was different from that in root. The bioaccumulation values of REEs in wheat root were much higher than in wheat tops. Variations of glutamic oxaloacetic transaminase (GOT) enzyme activities in wheat root and tops were determined. A good correlation existed between the bioaccumulation values of REEs and GOT enzyme activities, and the correlation coefficients were higher than 0.922. GOT is an important parameter influencing the bioavailability of REEs.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, People's Republic of China.
authors.forename: G
authors.initials: G
authors.lastname: Zhimang
authors.forename: W
authors.initials: W
authors.lastname: Xiaorong
authors.forename: G
authors.initials: G
authors.lastname: Xueyuan
authors.forename: C
authors.initials: C
authors.lastname: Jing
authors.forename: W
authors.initials: W
authors.lastname: Liansheng
authors.forename: D
authors.initials: D
authors.lastname: Lemei
authors.forename: C
authors.initials: C
authors.lastname: Yijun
mesh_terms: D001219:Aspartate Aminotransferases / Q000378:metabolism*; D001578:Benzopyrans / Q000737:chemistry*; D001682:Biological Availability; D007700:Kinetics; D008674:Metals, Rare Earth / Q000493:pharmacokinetics*; D018517:Plant Roots / Q000737:chemistry; D012989:Soil Pollutants / Q000493:pharmacokinetics*; D014018:Tissue Distribution; D014908:Triticum / Q000737:chemistry / Q000201:enzymology*
chemical_list: D001578:Benzopyrans; D008674:Metals, Rare Earth; D012989:Soil Pollutants; D001219:Aspartate Aminotransferases; C005023:fulvic acid