Mechanisms of Phosphorus Uptake from Soils by Arbuscular Mycorrhizal Fungi
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    Abstract:

    Phosphorus is easy to be fixed and precipitated in the soil. Under the condition of low phosphorus utilization rate of plants, over-fertilization will lead to waste of phosphorus fertilizer, which may lead to eutrophication of water body and non-point source pollution through surface runoff, groundwater dissolution, etc., which has a great impact on human production and life. Combining arbuscular mycorrhizal fungi (AMF) with plants, the symbiotic mycorrhizal fungi formed could significantly enhance the uptake and utilization by plants. This paper analyzes and summarizes the research progress in four aspects:the mechanism of AMF promoting plant phosphorus uptake, the molecular mechanism of AMF promoting plant phosphorus uptake, the influence of root exudates under the action of AMF on plant phosphorus utilization, and the influence of rhizosphere microorganisms on AMF phosphorus utilization.AMF can expand the range of nutrient uptake by plants by changing the root morphology of host plants and the formation of mycelium network; The release of organic acids, phosphatases, protons and other root secretions changed the soil structure and physicochemical properties, and decreased the solubility of insoluble phosphate in the soil under the combined action of rhizosphere microorganisms; Specific expression of related phosphorus transporter genes was induced to improve the ability of phosphorus transport in plants and promote their absorption.

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History
  • Received:August 09,2019
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  • Online: December 19,2019
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