A Theoretical Study Relating the Concentration and Diffusion of Oxygen to the Biology of Organisms in Soil

Griffin, D. M.

doi:10.1111/j.1469-8137.1968.tb05484.x

Cited by 33 publications

(13 citation statements)

References 74 publications

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“…Fungi produce spherical colonies in submerged culture and such colonies soon reach a critical size because of the limitations imposed by the diffusion of oxygen through the water-saturated mass of respiring hyphae. These critical radii are small, varying from 0·01 to 0·04 cm for the fungi investigated (Griffin 1968). Once these critical radii are exceeded, the centres of the spherical colonies become anaerobic.…”

Section: (D) Discussionmentioning

confidence: 91%

“…Proximal to the compact apex, the rhizomorph may be considered as a hollow cylinder, the walls of which are composed of fungal cells of negligible metabolic activity compared with those of the apex. Such a model permits an analysis of the role of oxygen analogous to those given by Griffin (1968). There, many arguments were presented relevant to the present model, in detail and at length: here only an abbreviated version will be given.…”

Section: (D) Theoretical Model (I) Derivation Of the Modelmentioning

confidence: 99%

“…As the cytochrome system may be presumed to be pre-eminent as a sink for oxygen, and as the Michaelis constant for the reaction of cytochrome oxidase with oxygen is negligible compared with atmospheric oxygen concentration (Griffin 1968) equation (1) may be simplified to…”

Section: (D) Theoretical Model (I) Derivation Of the Modelmentioning

confidence: 99%

“…The influence of oxygen on soil organisms has been discussed recently (Griffin 1968;Stolzy and Van Gundy 1968). From these reviews it is clear that oxygen can be a limiting factor for growth of fungi either generally in a soil mass or more commonly within scattered, localized sites.…”

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confidence: 99%

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Oxygen and the Ecology of Armillariella Elegans Heim

Smith¹,

Griffin²

1971

Aust. Jnl. Of Bio. Sci.

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Oxygen is important in the ecology of A. elegans because it affects both the rate of growth and form ofrhizomorphs. Maximum growth is dependent on high rates of oxygen diffusion within the central canals of rhizomorphs but partial pressures of oxygen in excess of 0·04 atm in contact with the outside surfaces of rhizomorphs are inhibitory.In long rhizomorphs, the rate of diffusion is maintained because of repeated connections that are made between the central canals and substrate-air interfaces. In the absence of such interfaces, rhizomorphs grow for about 20 cm when the rate of diffusion of oxygen to the apices becomes limiting. Then the rhizomorphs flatten and become plaque-like and their growth slows. Such rhizomorphs are well adapted for absorbing nutrients from a host but not for spreading from host to host.Partial pressures of oxygen in excess of about 0·04 atm in contact with the outsides of rhizomorphs stimulate the activity of p-diphenol oxidase. This enzyme catalyses the formation of a brown pigment in the rhizomorphs and circumstantial evidence indicates that when this pigment forms in the apices of rhizomorphs it inhibits their growth. This pigment overlays the walls of the cells and probably prevents either the uptake of nutrients or the disposal of waste products by the cells.In soil, oxygen partial pressures are usually above 0·04 atm but rhizomorphs continue to grow if water films form around their apices. Oxygen diffuses slowly in these films and the rhizomorphs reduce the partial pressure of oxygen at their surface to below 0·04 atm. The formation of such water films depends on the moisture content, texture, and bulk density of the soil. By altering these properties and preventing the pathogen spreading from host to host, the disease caused by A. elegans may be controlled.Carbon dioxide had little effect on the initiation and growth of rhizomorphs except that partial pressures between about o· Ol and 0·07 atm were slightly stimulatory. Because this is the range of partial pressures normally found in soil and hosts, carbon dioxide is unlikely to significantly affect A. elegans.

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Section: (D) Discussionmentioning

confidence: 91%

Section: (D) Theoretical Model (I) Derivation Of the Modelmentioning

confidence: 99%

Section: (D) Theoretical Model (I) Derivation Of the Modelmentioning

confidence: 99%

mentioning

confidence: 99%

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Oxygen and the Ecology of Armillariella Elegans Heim

Smith¹,

Griffin²

1971

Aust. Jnl. Of Bio. Sci.

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“…Unlike Kausch and Pallud (2013) and Yang et al (2014), we have not explicitly simulated the oxygen distribution inside the aggregates. Since the apparent oxygen affinity parameter (which we use here) generally increases with aggregate size (Griffin, 1968), the poorer agreement between data and predictions using the default oxygen affinity parameter indicates that soil aggregates may play an important role in controlling microbes' response to soil moisture stress. Indeed, Franzluebbers (1999) indicated in his Fig.…”

Section: Example Application To Modeling Aerobic Heterotrophic Respirmentioning

confidence: 99%

SUPECA kinetics for scaling redox reactions in networks of mixed substrates and consumers and an example application to aerobic soil respiration

Tang

Riley

2017

Geosci. Model Dev.

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Abstract. Several land biogeochemical models used for studying carbon-climate feedbacks have begun explicitly representing microbial dynamics. However, to our knowledge, there has been no theoretical work on how to achieve a consistent scaling of the complex biogeochemical reactions from microbial individuals to populations, communities, and interactions with plants and mineral soils. We focus here on developing a mathematical formulation of the substrate-consumer relationships for consumer-mediated redox reactions of the form A+B E → products, where products could be, e.g., microbial biomass or bioproducts. Under the quasi-steady-state approximation, these substrate-consumer relationships can be formulated as the computationally difficult full equilibrium chemistry problem or approximated analytically with the dual Monod (DM) or synthesizing unit (SU) kinetics. We find that DM kinetics is scaling inconsistently for reaction networks because (1) substrate limitations are not considered, (2) contradictory assumptions are made regarding the substrate processing rate when transitioning from single-to multi-substrate redox reactions, and (3) the product generation rate cannot be scaled from one to multiple substrates. In contrast, SU kinetics consistently scales the product generation rate from one to multiple substrates but predicts unrealistic results as consumer abundances reach large values with respect to their substrates. We attribute this deficit to SU's failure to incorporate substrate limitation in its derivation. To address these issues, we propose SUPECA (SU plus the equilibrium chemistry approximation -ECA) kinetics, which consistently imposes substrate and consumer mass balance constraints. We show that SUPECA kinetics satisfies the partition principle, i.e., scaling invariance across a network of an arbitrary number of reactions (e.g., as in Newton's law of motion and Dalton's law of partial pressures). We tested SUPECA kinetics with the equilibrium chemistry solution for some simple problems and found SU-PECA outperformed SU kinetics. As an example application, we show that a steady-state SUPECA-based approach predicted an aerobic soil respiration moisture response function that agreed well with laboratory observations. We conclude that, as an extension to SU and ECA kinetics, SUPECA provides a robust mathematical representation of complex soil substrate-consumer interactions and can be applied to improve Earth system model (ESM) land models.

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Water and Microbial Stress

Griffin

1981

Advances in Microbial Ecology

182

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A Theoretical Study Relating the Concentration and Diffusion of Oxygen to the Biology of Organisms in Soil

Cited by 33 publications

References 74 publications

Oxygen and the Ecology of Armillariella Elegans Heim

Oxygen and the Ecology of Armillariella Elegans Heim

SUPECA kinetics for scaling redox reactions in networks of mixed substrates and consumers and an example application to aerobic soil respiration

Water and Microbial Stress

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