title: Synergistic effects of plant growth-promoting Neorhizobium huautlense T1-17 and immobilizers on the growth and heavy metal accumulation of edible tissues of hot pepper.
abstract: A plant growth-promoting Neorhizobium huautlense T1-17 was evaluated for its immobilization of Cd and Pb in solution. Meanwhile, the impacts of T1-17, immobilizers (vermiculite and peat) and their combination on the fruit biomass and heavy metal accumulation of hot pepper were characterized. T1-17 could significantly reduced water-soluble Cd and Pb in solution. T1-17, vermiculite+T1-17, peat, and peat+T1-17 significantly increased the fruit biomass (ranging from 45% to 269%) and decreased the fruit Cd (ranging from 66% to 87%) and Pb (ranging from 30% to 56%) contents and water-soluble Cd and Pb (ranging from 23% to 59%) contents of the rhizosphere soils compared to the controls. T1-17+vermiculite or peat had higher ability to increase the fruit biomass than T1-17 or vermiculite or peat. Furthermore, T1-17+peat had higher ability to reduce the water-soluble Cd and Pb contents of the rhizosphere soil and the fruit Pb uptake of hot pepper. The results showed that T1-17 and the immobilizers alleviated the heavy metal toxicity and decreased the fruit heavy metal uptake of hot pepper. The results also showed the synergistic effects of T1-17 and the immobilizers on the growth and Cd and Pb accumulation of hot pepper.
authors.affiliation: Key Laboratory of Agricultural and Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China.
authors.forename: Ling
authors.initials: L
authors.lastname: Chen
authors.affiliation: Key Laboratory of Agricultural and Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China.
authors.forename: Lin-Yan
authors.initials: LY
authors.lastname: He
authors.affiliation: Key Laboratory of Agricultural and Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Key Laboratory of Agricultural and Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China. Electronic address: xfsheng@njau.edu.cn.
authors.forename: Xia-Fang
authors.initials: XF
authors.lastname: Sheng
mesh_terms: D000538:Aluminum Silicates; D002104:Cadmium; D002212:Capsicum / Q000254:growth & development* / Q000378:metabolism; D005638:Fruit; D007854:Lead; D019216:Metals, Heavy / Q000378:metabolism*; D012230:Rhizobiaceae / Q000502:physiology*; D058441:Rhizosphere; D012987:Soil; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D000538:Aluminum Silicates; D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; C003760:vermiculite; D007854:Lead
keywords: Edible tissue Cd and Pb accumulation; Heavy metal-contaminated soil; Hot pepper; Immobilizers; Neorhizobium huautlense T1-17