Phosphate-solubilising microorganisms for improved crop productivity: a critical assessment
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Phosphate-solubilising microorganisms for improved crop productivity : a critical assessment. / Raymond, Nelly S.; Gomez-Munoz, Beatriz; van der Bom, Frederik J. T.; Nybroe, Ole; Jensen, Lars S.; Mueller-Stover, Dorette S.; Oberson, Astrid; Richardson, Alan E.
In: New Phytologist, Vol. 229, No. 3, 2021, p. 1268-1277.Research output: Contribution to journal › Review › Research › peer-review
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TY - JOUR
T1 - Phosphate-solubilising microorganisms for improved crop productivity
T2 - a critical assessment
AU - Raymond, Nelly S.
AU - Gomez-Munoz, Beatriz
AU - van der Bom, Frederik J. T.
AU - Nybroe, Ole
AU - Jensen, Lars S.
AU - Mueller-Stover, Dorette S.
AU - Oberson, Astrid
AU - Richardson, Alan E.
PY - 2021
Y1 - 2021
N2 - 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 seenin vitrodo 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.
AB - 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 seenin vitrodo 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.
KW - agriculture
KW - microbial biomass
KW - microorganisms
KW - phosphorus
KW - plant nutrition
KW - solubilisation
KW - PSEUDOMONAS PROTEGENS CHA0
KW - PLANT-GROWTH
KW - SOIL-MICROORGANISMS
KW - PENICILLIUM-BILAII
KW - MICROBIAL BIOMASS
KW - SEWAGE-SLUDGE
KW - PHOSPHORUS MINERALIZATION
KW - ORGANIC PHOSPHORUS
KW - ROCK PHOSPHATE
KW - MAIZE GROWTH
U2 - 10.1111/nph.16924
DO - 10.1111/nph.16924
M3 - Review
C2 - 32929739
VL - 229
SP - 1268
EP - 1277
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 3
ER -
ID: 250480744