Mycelial fragment size distribution: an analysis based on fractal geometry

Jones, Cameron L.; Lonergan, Greg T.; Mainwaring, David E.

doi:10.1007/bf00228613

Cited by 20 publications

(10 citation statements)

References 36 publications

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“…In one study, Aspergillus niger had values of D BM = 1.3-1.47 [34]. Fractal dimension has also been used in analysis of fragment size distribution, when mycelia have been fragmented in a homogeniser to form inoculum [40]. With the wood decay basidiomycete Phanerochaete chrysosporium, D BM decreased with increasing shear force [40].…”

Section: Mycelial Fungimentioning

confidence: 99%

“…Microarthropod grazing results in dramatic changes in mycelial morphology (Figure 8.10), including changes in fractal structure [73]. When the collembolan Folsomia candia grazed on Hypholoma fasciculare, at different grazing intensities (20,40 or 60 collembola added to mycelia with a radius of 1.5 cm), there was no significant difference in D BM , but D BS differed significantly: from 30 days D BS was significantly higher in controls and decreased monotonously with increased grazing intensity. Not only do effects vary depending on grazing intensity, but also on collembolan species and fungal species [74].…”

Section: Effects Of Invertebrate Grazing and Destructive Disturbancementioning

confidence: 99%

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Fractal Geometry and Microorganisms in the Environment

Boddy

Donnelly

2008

Biophysical Chemistry of Fractal Structures and Processes in Environmental Systems

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Section: Mycelial Fungimentioning

confidence: 99%

Section: Effects Of Invertebrate Grazing and Destructive Disturbancementioning

confidence: 99%

Fractal Geometry and Microorganisms in the Environment

Boddy

Donnelly

2008

Biophysical Chemistry of Fractal Structures and Processes in Environmental Systems

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“…These were inoculated into 20 cm 3 of MEB and incubated at 37°C for 5 days. The fungal mat was collected, homogenised at 16 700 rpm for 60 s 14 and an 18 cm 3 sample of the mycelial fragment suspension used to inoculate the sterile reactor¯uid.…”

Section: Fermentation Experimentsmentioning

confidence: 99%

Dimethylsulfoxide elevates extracellular laccase (phenol oxidase) activity ofPycnoporus cinnabarinusgrown on a low nutritional newspaper medium

Jones

Baker

Lonergan

2001

J of Chemical Tech & Biotech

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The white-rot fungus Pycnoporus cinnabarinus, grown on a low nutrient newspaper medium, secreted low amounts of extracellular laccase. The laccase activity was increased when 3% methanol was added to the medium and further increased when 3% dimethylsulfoxide was added. Dimethylsulfoxide increased the enzyme activity over controls when the fungus was grown on a malt extract broth, or media containing either recycled Kraft paper or cellobiose. Treatment with the ionophore A23187 suggested that dimethylsulfoxide acted as a paramorphogen to increase the branch points of the mycelial mat. Hence, the number of ion channels for secretion of the enzyme was increased. When the fungus was grown in a 2 dm 3 bioreactor, sparged with air, the measured extracellular protein concentration rose and remained relatively steady for 15 days. The enzyme activity and speci®c activity reached a maximum between days 6 and 9 and then fell from day 10 of fermentation. The presence of dimethylsulfoxide in the bioreactor caused a four-fold increase in enzyme activity and prolonged its secretion in the bioreactor for at least 25 days. The protein concentration and speci®c activity also remained at high levels over this period.

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“…Image processing and analysis was performed using a personal computer (AT-486-33mHz) according to the previously described methods (Jones et a/., 1993a;Jones et al, 1993b) using Colour freelance software and a purpose written program to calculate the "sandbox method" (mass/density) relation to estimate the fractal dimension (self-similarity measure) of branching fungal colonies. …”

Section: Methodsmentioning

confidence: 99%