Emergence of self-organised oscillatory domains in fungal mycelia

Tlalka, M.; Bebber, Daniel P.; Darrah, P. R.; Watkinson, Sarah C.; Fricker, Mark D.

doi:10.1016/j.fgb.2007.02.013

Cited by 43 publications

(48 citation statements)

References 85 publications

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“…However, the elusive pacemaker may prove to be a red herring. The rich literature concerning biological oscillators covers cycles as diverse as Canadian lynx/hare relationships (Krebs et al, 1995), fungal mycelia nutrient allocation (Tlalka et al, 2007), cardiac cell energetics (Aon et al, 2003(Aon et al, , 2008a(Aon et al, , 2008b, yeast energetics (Ghosh and Chance, 1964;Aon et al, 2003Aon et al, , 2008aAon et al, , 2008bXu and Tsurugi, 2007), and of course circadian rhythms (Hastings et al, 2008;Johnson et al, 2008). It has become clear that in many of these systems a central pacemaker does not govern oscillations.…”

Section: Nad(p)h/nad(p)mentioning

confidence: 99%

Oscillatory Growth in Lily Pollen Tubes Does Not Require Aerobic Energy Metabolism

et al. 2009

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Oscillatory tip growth in pollen tubes depends on prodigious amounts of energy. We have tested the hypothesis that oscillations in the electron transport chain lead to growth oscillations in lily (Lilium formosanum). Using three respiratory inhibitors, oligomycin, antimycin A, and cyanide, we find that pollen tube growth is much less sensitive to respiratory inhibition than respiration is. All three block respiration at concentrations severalfold lower than necessary to inhibit growth. Mitochondrial NAD(P)H and potentiometric JC-1 fluorescence, employed as markers for electron transport chain activity, rise rapidly in response to oligomycin, as expected. Pollen tube growth stops for several minutes before resuming. Subsequent growth has a lower mean rate, but continues to oscillate, albeit with a longer period. NAD(P)H fluorescence no longer exhibits coherent oscillations, and mitochondria no longer congregate directly behind the apex: they distribute evenly throughout the cell. Postinhibition growth relies on aerobic fermentation for energy production as revealed by an increase in ethanol in the media. These data suggest that oscillatory growth depends not on a single oscillatory pacemaker but rather is an emergent property arising from a number of stable limit cycles.

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Section: Nad(p)h/nad(p)mentioning

confidence: 99%

Oscillatory Growth in Lily Pollen Tubes Does Not Require Aerobic Energy Metabolism

et al. 2009

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“…At subtoxic concentrations (Ͻ10 Ϫ5 M), [1][2][3][4][5][6][7][8][9][10][11][12][13][14] C]AIB ([ 14 C]AIB) acts as a radiolabeled tracer of amino acid translocation (2,33,34,36). The novel technique of photon-counting scintillation imaging (PCSI) (2) can map the direction and velocity of movement of radiolabeled compounds at high spatial and temporal resolutions in real time (2,33,34).…”

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confidence: 99%

Imaging of Long-Distance α-Aminoisobutyric Acid Translocation Dynamics during Resource Capture by Serpula lacrymans

Tlalka

Fricker

Watkinson

2008

Appl Environ Microbiol

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␣-Aminoisobutyric acid (AIB) is a nonmetabolized amino acid analogue of alanine, which at low (M) concentrations acts as a tracer for amino acid movements. At high concentrations (mM), it competitively inhibits membrane transport and metabolism of protein amino acids and acts as a systemic translocated inhibitor of mycelial extension in fungi. AIB can control mycelial spread of the basidiomycete Serpula lacrymans, the cause of brown rot of wood in buildings. However, it is not known how effectively the inhibitor is distributed throughout the mycelium. Realistically heterogeneous microcosms, in which the fungus grew across nutritionally inert sand to colonize discrete wood resources, were used to investigate patterns of inhibition and translocation following local application of AIB. At a 0.1 M concentration, locally applied AIB caused immediate arrest of extension throughout the whole mycelium, maintained for a 6-week experimental period

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“…We have demonstrated the practicability of the framework by applying it to a class of biologically inspired models, which produce qualitatively similar canalised flow patterns to those observed in real woodland fungi [15,16,17,19]. This suggests that for organisms that have to adapt their morphology to a variable environment, function may play a crucial role in determining structure.…”

Section: Concluding Remarks and Discussionmentioning

confidence: 67%

“…This example is Phanerochaete velutina, a foraging saprotrophic woodland fungus that builds an adaptive network to translocate resource [13,14,15]. The transport flux is oscillatory and still not fully understood [14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Network Automata: Coupling Structure and Function in Dynamic Networks

Smith

Onnela

Lee

et al. 2011

Advs. Complex Syst.

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We introduce Network Automata, a framework which couples the topological evolution of a network to its structure. It is useful for dealing with networks in which the topology evolves according to some specified microscopic rules and, simultaneously, there is a dynamic process taking place on the network that both depends on its structure but is also capable of modifying it. It is a generic framework for modeling systems in which network structure, dynamics, and function are interrelated. At the practical level, this framework allows for easy implementation of the microscopic rules involved in such systems. To demonstrate the approach, we develop a class of simple biologically inspired models of fungal growth.

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Emergence of self-organised oscillatory domains in fungal mycelia

Cited by 43 publications

References 85 publications

Oscillatory Growth in Lily Pollen Tubes Does Not Require Aerobic Energy Metabolism

Oscillatory Growth in Lily Pollen Tubes Does Not Require Aerobic Energy Metabolism

Imaging of Long-Distance α-Aminoisobutyric Acid Translocation Dynamics during Resource Capture by Serpula lacrymans

Network Automata: Coupling Structure and Function in Dynamic Networks

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