Effect of heavy-metal-resistant bacteria on enhanced metal uptake and translocation of the Cu-tolerant plant, Elsholtzia splendens

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• 作者：Chen Xu ; Xincai Chen ; Dechao Duan…
• 关键词：Heavy metal ; Phytoextraction ; Plant ; growth ; promoting rhizobacteria ; Heavy ; metal ; resistant bacteria ; Tolerant plant
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：22
• 期：7
• 页码：5070-5081
• 全文大小：1,400 KB
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  8. Chen, YX, Wang, YP, Lin, Q, Luo, YM (2005) Effect of copper-tolerant rhizosphere bacteria on mobility of copper in soil and copper accumulation by Elsholtzia splendens. Environ Int 31: pp. 861-866 CrossRef
  9. Chen, XC, Shi, JY, Chen, YX, Xu, XH, Xu, SY, Wang, YP (2006) Tolerance and biosorption of copper and zinc by Pseudomonas putida CZ1 isolated from metal-polluted soil. Can J Microbiol 52: pp. 308-316 CrossRef
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

A hydroponics trial was employed to study the effects of Pseudomonas putida CZ1 (CZ1), a heavy-metal-resistant bacterial strain isolated from the rhizosphere of Elsholtzia splendens (E. splendens), on the uptake and translocation of copper (Cu) in E. splendens. Significant promotion of plant growth coupled with the obvious plant-growth-promoting (PGP) characters of the bacteria suggested that CZ1 would be a plant-growth-promoting rhizobacterium (PGPR) to E. splendens under Cu stress condition. The results of inductively coupled plasma optical emission spectrometry (ICP-OES) showed that CZ1 increased the concentration of Cu in the shoots (up to 211.6?% compared to non-inoculation treatment) and translocation factor (TF) (from 0.56 to 1.83?%) of those exposed to Cu. The distribution of Cu in root cross section measured by synchrotron-based X-ray fluorescence microscopy (SRXRF) indicated that CZ1 promoted the transport of Cu from cortex to xylem in roots, which contributed to the accumulation of Cu in shoots. Furthermore, CZ1 improved the uptake of nutrient elements by plants to oppose to the toxicity of Cu. In summary, P. putida CZ1 acted as a PGPR in resistance to Cu and promoted the accumulation and translocation of Cu from root to shoot by element redistribution in plant root; hence, CZ1 is a promising assistance to phytoremediation.