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Macklon, A. E. S.; Grayston, Susan J.; Shand, C. A.; Sim, Allan; Sellars, Scott; Ord, B. G.

doi:10.1023/a:1004294617461

Cited by 46 publications

(1 citation statement)

References 19 publications

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“…Microorganisms immobilise nutrients which prevents the plants from taking the nutrient, thus creating a competition. However, generally the turnover time of bacteria is much smaller than that of plants, so the immobilised nutrient is redistributed into the soil relatively quickly, and following Macklon et al (1997) and Oehl et al (2001), this can lead to measurable increases in soluble concentrations. It is suggested by Seeling and Zasoski (1993) that immobilisation may be an important mechanism for regulating soluble phosphorus and maintaining it in labile forms available to the plant.…”

Section: Discussionmentioning

confidence: 99%

Quasi-steady uptake and bacterial community assembly in a mathematical model of soil-phosphorus mobility

Moyles¹,

Donohue²,

Fowler³

2019

Preprint

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We mathematically model the uptake of phosphorus by a soil community consisting of a plant and two bacterial groups: copiotrophs and oligotrophs. Four equilibrium states emerge, one for each of the species monopolising the resource and dominating the community and one with coexistence of all species. We show that the dynamics are controlled by the ratio of chemical adsorption to bacterial death permitting either oscillatory states or quasi-steady uptake. We show how a steady state can emerge which has soil and plant nutrient content unresponsive to increased fertilization. However, the additional fertilization supports the copiotrophs leading to community reassembly. Our results demonstrate the importance of time-series measurements in nutrient uptake experiments.

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Section: Discussionmentioning

confidence: 99%

Quasi-steady uptake and bacterial community assembly in a mathematical model of soil-phosphorus mobility

Moyles¹,

Donohue²,

Fowler³

2019

Preprint

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Role of Phosphorus in Imparting Abiotic Stress Tolerance to Plants

Baroowa¹,

Paul²,

Gogoi³

2022

Climate Change and Agriculture

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Partitioning of soil phosphorus regulates competition between Vaccinium vitis‐idaea and Deschampsia cespitosa

Ahmad-Ramli

Cornulier

Johnson

2013

Ecology and Evolution

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It has been hypothesized that the wide range of forms and complexities of phosphorus (P) in soil may result in resource partitioning that contributes to the maintenance of plant species diversity. Here, we test whether the graminoid, Deschampsia cespitosa, and the ericaceous shrub, Vaccinium vitis-idaea, which often coexist, display preferences in utilization of P forms, and differ in their production of extracellular P-degrading enzymes. We provided plants with no additional P, or P forms with decreasing lability, namely sodium phosphate (SP), D-glucose 6 phosphate (DG6P), sodium phytate (PASS), and a combination of SP, DG6P, and PASS. We also tested if preferences for P forms affected the competitive outcomes between the two species compared between conspecifics, as indicated by shoot biomass and acquisition of nitrogen (N) and P. Both D. cespitosa and V. vitis-idaea produced the greatest biomass when supplied with a mix of all three forms of P. Of the three forms of P tested alone, shoot biomass produced by both species was least when supplied with SP. D. cespitosa performed better when grown with PASS or a mix of all P forms compared with the performance of V. vitis-idaea on these substrates. This was reflected by substantially greater phytase activity on the surface of its roots compared with V. vitis-idaea. In contrast, V. vitis-idaea produced more phosphomonoesterase to hydrolyze the simple organic P form, DG6P. Although N was kept constant in the treatments, the ability of plants to acquire it was dependent on species identity, competition, and P supply. These findings provide direct evidence for preferences toward specific forms of P and indicate a key role played by organic forms of P. The results support the idea that partitioning for soil P is one factor regulating plant competition, and ultimately, community composition. Our data also highlight the importance of the interplay between P supply and N acquisition.

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Cited by 46 publications

References 19 publications

Quasi-steady uptake and bacterial community assembly in a mathematical model of soil-phosphorus mobility

Quasi-steady uptake and bacterial community assembly in a mathematical model of soil-phosphorus mobility

Role of Phosphorus in Imparting Abiotic Stress Tolerance to Plants

Partitioning of soil phosphorus regulates competition between Vaccinium vitis‐idaea and Deschampsia cespitosa

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