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Development of mycelial systems of Stropharia caerulea and Phanerochaete velutina on soil: effect of temperature and water potential

Published online by Cambridge University Press:  01 June 1997

DAMIAN P. DONNELLY  and
LYNNE BODDY
DAMIAN P. DONNELLY
Affiliation:
School of Pure and Applied Biology, University of Wales, PO Box 915, Cardiff CF1 3TL, U.K.
LYNNE BODDY
Affiliation:
School of Pure and Applied Biology, University of Wales, PO Box 915, Cardiff CF1 3TL, U.K.
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Abstract

Effect of temperature and water potential on extension rate, extra-resource biomass and fractal dimension of Stropharia caerulea and Phanerochaete velutina growing in trays of soil was determined non-destructively with time, by image analysis. S. caerulea responded differently from P. velutina, mycelial extension and biomass production rates of the former being considerably affected by changes in temperature and water potential, with greater aggregation of mycelia into cords at 25 °C and at and below −0·02 MPa. These morphological changes were reflected in the fractal dimension values. Mycelial extension of S. caerulea on agar was sensitive to temperatures above 25 ° and water potentials below −1·3 MPa. This is the first reported work on abiotic effects on fractal dimension of cord-forming fungi on soil, and these results are discussed in terms of the function of mycelial cords and foraging strategies.

Type
Research Article
Information
Mycological Research , Volume 101 , Issue 6 , June 1997 , pp. 705 - 713
Copyright
The British Mycological Society 1997

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