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Ecotoxicology and environmental safety v.147, 2018년, pp.175 - 191   SCI SCIE
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Bacterial mediated alleviation of heavy metal stress and decreased accumulation of metals in plant tissues: Mechanisms and future prospects

Etesami, Hassan
  • 초록  

    Abstract Heavy metal pollution of agricultural soils is one of main concerns causing some of the different ecological and environmental problems. Excess accumulation of these metals in soil has changed microbial community (e.g., structure, function, and diversity), deteriorated soil, decreased the growth and yield of plant, and entered into the food chain. Plants’ tolerance to heavy metal stress needs to be improved in order to allow growth of crops with minimum or no accumulation of heavy metals in edible parts of plant that satisfy safe food demands for the world's rapidly increasing population. It is well known that PGPRs (plant growth-promoting rhizobacteria) enhance crop productivity and plant resistance to heavy metal stress. Many recent reports describe the application of heavy metal resistant-PGPRs to enhance agricultural yields without accumulation of metal in plant tissues. This review provides information about the mechanisms possessed by heavy metal resistant-PGPRs that ameliorate heavy metal stress to plants and decrease the accumulation of these metals in plant, and finally gives some perspectives for research on these bacteria in agriculture in the future. Highlights Action mechanisms of PGPRs in alleviating metal stress in plant were highlighted. PGPRs may reduce uptake and accumulation of heavy metals in plants. Future research needs about the use of PGPRs under metal stress were highlighted. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    PGPRs .   Heavy metal stress, bacterial-mediated heavy metal tolerance .   Metal immobilization.  

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