title: Trichoderma atroviride F6 improves phytoextraction efficiency of mustard (Brassica juncea (L.) Coss. var. foliosa Bailey) in Cd, Ni contaminated soils.
abstract: Trichoderma atroviride F6, isolated from decaying feather and resistant to 100 mg l(-1) Cd2+ and 250 mg l(-1) Ni2+, was applied for rhizoremediation of Cd, Ni and Cd-Ni combination contaminated soils through association with Brassica juncea (L.) Coss. var. foliosa. The strain significantly alleviated the cellular toxicity of cadmium and nickel to plants. Inoculation of B. juncea (L.) Coss. var. foliosa with T. atroviride F6 resulted a 110%, 40% and 170% increase in fresh weight in Cd, Ni and Cd-Ni contaminated soils, respectively (P<0.05). The translocation factors and metal bioconcentration factors calculated for the inoculated plant were increased compared to the noninoculated plants. The results indicated that the efficiency of phytoextraction for B. juncea (L.) Coss. var. foliosa enhanced after inoculating with T. atroviride F6. The fungal treated plants grown in Cd-Ni combination contaminated soils showed higher phytoextraction efficiency than those in Cd or Ni contaminated soils. Thus, it is suggested that the fungus T. atroviride F6 endowed with organic-degrading capabilities could be exploited for fungi-assisted phytoremediation of mixed organic-metal contaminated soils.
authors.affiliation: State Key Laboratory for Biocontrol and Department of Biochemistry, School of Life Sciences, Zhongshan (Sun Yatsen) University, Guangzhou 510275, PR China. caolx@mail.sysu.edu.cn <caolx@mail.sysu.edu.cn>
authors.forename: Lixiang
authors.initials: L
authors.lastname: Cao
authors.forename: Min
authors.initials: M
authors.lastname: Jiang
authors.forename: Zhirui
authors.initials: Z
authors.lastname: Zeng
authors.forename: Aixue
authors.initials: A
authors.lastname: Du
authors.forename: Hongming
authors.initials: H
authors.lastname: Tan
authors.forename: Yuhuan
authors.initials: Y
authors.lastname: Liu
mesh_terms: D001483:Base Sequence; D001937:Brassica / Q000378:metabolism*; D002104:Cadmium / Q000302:isolation & purification / Q000378:metabolism*; D017931:DNA Primers; D052918:Environmental Restoration and Remediation / Q000379:methods*; D009532:Nickel / Q000302:isolation & purification / Q000378:metabolism*; D012989:Soil Pollutants / Q000302:isolation & purification / Q000378:metabolism*; D014242:Trichoderma / Q000378:metabolism*
chemical_list: D017931:DNA Primers; D012989:Soil Pollutants; D002104:Cadmium; D009532:Nickel