title: Effects of Cd, Pb, Zn, Cu-resistant endophytic Enterobacter sr CBSB1 and Rhodotorula sp. CBSB79 on the growth and phytoextraction of Brassica plants in multimetal contaminated soils.
abstract: To survey the effects of endophytic Enterobacter sp. CBSB1 and Rhodotorula sp. CBSB79 resistant to Cd2+, Pb2+, Zn2+, and Cu2+ on the growth and phytoextraction of Brassica, the endophytes were isolated by surface- sterilized methods and characterized. The CBSB1 significantly increased 44.2% of the dry weight of Brassica napus in the multimetal contaminated soil (P < 0.05) and showed no effect or declined the dry weight of B. alboglabra, B. campestris ssp. chinensis var. cummunis, B. campestris ssp. chinensis var. utilis cv. Youqing12, B. campestris ssp. chinensis var. utilis cv. Lvbao701 plants. The dry weights of B. napus, B. campestris ssp. chinensis var. utilis, and B. alboglabra showed a significant increase when the CBSB79 was inoculated (P < 0.05). In general, inoculation with bacteria and yeast did not greatly alter the metal concentration in plant tissues. Compared to Enterobacter sp. CBSB1, the yeast Rhodotorula sp CBSB79 showed higher potentials to improve extraction efficacy of Cd, Pb, Zn, and Cu by Brassica seedlings in the field.
authors.affiliation: Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China.
authors.forename: Wenfeng
authors.initials: W
authors.lastname: Wang
authors.forename: Zujun
authors.initials: Z
authors.lastname: Deng
authors.forename: Hongming
authors.initials: H
authors.lastname: Tan
authors.forename: Lixiang
authors.initials: L
authors.lastname: Cao
mesh_terms: D001483:Base Sequence; D001673:Biodegradation, Environmental; D018533:Biomass; D001937:Brassica / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology*; D002104:Cadmium / Q000032:analysis / Q000378:metabolism / Q000494:pharmacology; D019755:Carbon-Carbon Lyases / Q000378:metabolism; D003300:Copper / Q000032:analysis / Q000378:metabolism / Q000494:pharmacology; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D060026:Endophytes / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification*; D004754:Enterobacter / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification*; D007210:Indoleacetic Acids / Q000378:metabolism; D007854:Lead / Q000032:analysis / Q000378:metabolism / Q000494:pharmacology; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism* / Q000494:pharmacology; D008969:Molecular Sequence Data; D010937:Plant Growth Regulators / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology; D018520:Plant Shoots / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology; D012248:Rhodotorula / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification*; D036226:Seedlings / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology; D017422:Sequence Analysis, DNA; D017262:Siderophores / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism; D015032:Zinc / Q000032:analysis / Q000378:metabolism / Q000494:pharmacology
chemical_list: D004275:DNA, Ribosomal; D007210:Indoleacetic Acids; D019216:Metals, Heavy; D010937:Plant Growth Regulators; D017262:Siderophores; D012989:Soil Pollutants; D002104:Cadmium; D007854:Lead; C030737:indoleacetic acid; D003300:Copper; C033634:1-aminocyclopropane-1-carboxylate deaminase; D019755:Carbon-Carbon Lyases; D015032:Zinc