title: Compound amino acids added in media improved Solanum nigrum L. phytoremediating CD-PAHS contaminated soil.
abstract: Cd hyperaccumulator Solanum nigrum L. was a promising plant used to simultaneously remediate Cd-PAHs combined pollution soil through its extra accumulation capacity and rhizosphere degradation. This article compared the strengthening remediation role of cysteine (Cys), glycine (Gly) and glutamic acid (Glu) with EDTA and TW80. The results showed that the addition of 0.03 mmol L(-1) Cys, Gly, and Glu didn't significantly impact (p < 0.05) shoot biomass of S. nigrum, but obviously increased Cd concentration. Therefore, Cd capacity (µg pot(-1)) in shoots of S. nigrum was significantly increased (p < 0.05) by 37.7% compared to the control without reagent added. At the meantime, the PAHs degradation ratio in rhizoshpere was increased by 34.5%. Basically, the improving role of Cys, Gly, and Glu was higher than EDTA and TW80. The main reasons of enhanced the accumulation of S. nigrum to Cd might lie in the addition of Cys, Gly, and Glu which reduced pH and increased extractable Cd concentration in rhizosphere and phytochelatines (PCs) concentration in leaves. As for the degradation of PAHs in rhizosphere, increased microorganism number might be play important role.
authors.affiliation: a Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang , P.R. China.
authors.forename: Shuhe
authors.initials: S
authors.lastname: Wei
authors.affiliation: a Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang , P.R. China.|b University of Chinese Academy of Sciences , Beijing , P.R. China.
authors.forename: Jiayi
authors.initials: J
authors.lastname: Bai
authors.affiliation: a Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang , P.R. China.|b University of Chinese Academy of Sciences , Beijing , P.R. China.
authors.forename: Chuanjie
authors.initials: C
authors.lastname: Yang
authors.affiliation: a Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang , P.R. China.
authors.forename: Qianru
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: c University of Münster , Münster , Germany.
authors.forename: Klaus-Holger
authors.initials: KH
authors.lastname: Knorrm
authors.affiliation: d Liaoning Vocational College of Medicine , Shenyang , P.R. China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhan
authors.affiliation: e Seed Control Station, Hinggan League, Inner Mongolia Autonomous Region , Ulan Hot , P.R. China.
authors.forename: Qianhui
authors.initials: Q
authors.lastname: Gao
mesh_terms: D000596:Amino Acids / Q000032:analysis / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D003470:Culture Media / Q000737:chemistry / Q000378:metabolism; D018515:Plant Leaves / Q000737:chemistry / Q000378:metabolism; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000378:metabolism*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D032324:Solanum nigrum / Q000737:chemistry / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D003470:Culture Media; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants; D002104:Cadmium
keywords: Solanum nigrum L., phytochelatines, Cd, PAHs; phytoremediation