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Phosphate-solubilising microorganisms for improved crop productivity: a critical assessment.
Journal article

Phosphate-solubilising microorganisms for improved crop productivity: a critical assessment.

  • Raymond NS School of Agriculture and Food Sciences, University of Queensland, St Lucia, QLD, 4072, Australia.
  • Gómez-Muñoz B Section for Plant and Soil Sciences, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C, 1871, Denmark.
  • van der Bom FJT School of Agriculture and Food Sciences, University of Queensland, St Lucia, QLD, 4072, Australia.
  • Nybroe O Section for Microbial Ecology and Biotechnology, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C, 1871, Denmark.
  • Jensen LS Section for Plant and Soil Sciences, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C, 1871, Denmark.
  • Müller-Stöver DS Section for Plant and Soil Sciences, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C, 1871, Denmark.
  • Oberson A Department of Environmental Systems Science, Institute of Agricultural Sciences, ETH Zürich, Eschikon 33, Lindau, CH-8315, Switzerland.
  • Richardson AE CSIRO Agriculture and Food, PO Box 1700, Canberra, ACT, 2601, Australia.
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  • 2020-09-15
Published in:
  • The New phytologist. - 2020
agriculture
microbial biomass
microorganisms
phosphorus
plant nutrition
solubilisation
English Phosphate-solubilising microorganisms (PSM) are often reported to have positive effects on crop productivity through enhanced phosphorus (P) nutrition. Our aim was to evaluate the validity of this concept. Most studies that report 'positive effects' of PSM on plant growth have been conducted under controlled conditions, whereas field experiments more frequently fail to demonstrate a positive response. Many studies have indicated that the mechanisms seen in vitro do not translate into improved crop P nutrition in complex soil-plant systems. Furthermore, associated mechanisms are often not rigorously assessed. We suggest that PSM do not mobilise sufficient P to change the crops' nutritional environment under field conditions. The current concept, in which PSM solubilise P 'for the plant' should thus be revised. Although PSM have the capacity to solubilise P to meet their own needs, it is the turnover of the microbial biomass that subsequently provides P to plants over a longer time. Therefore, the existing concept of PSM function is unlikely to deliver a reliable strategy for increasing crop P nutrition. A further mechanistic understanding is needed to determine how P mobilisation by PSM as a component of the whole soil community can be manipulated to become more effective for plant P nutrition.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://folia.unifr.ch/global/documents/36982
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