Cardinal Temperatures for Germination and Other Factors Affecting the Germination of Rhizomucor Pusillus Sporangiospores

  • J. J. Deploey


Germination of spores from thermophilic fungi has received little attention in spite of their importance in the deterioration of stored materials, in composting, and as causal agents of certain mycoses. In searching the literature only seven studies relating to the germination of spores from thermophilic fungi could be found (Celerin and Fergus, 1971; Deploey, 1985; Deploey and Gautam, 1987; Fergus and Delwiche, 1975; Jack and Tansey, 1977; Streets and Ingle, 1972; Sussman, 1976), and of these only two pertained to the germination of sporangiospores from Rhizomucor pusillus (Deploey, 1985; Jack and Tansey, 1977). The report by Jack and Tansey (1977) involved a study of germination by R. pusillus spores (and spores of other thermophilic fungi) exposed to sun-heated and sun-shaded soil. They also observed spore germination in the laboratory at several temperatures. The study by Deploey (1985) concerned the influence of atmosphere composition and defined-undefined media on the germination of R. pusillus sporangiospores, but all spores were incubated at 45°C. Regrettably, neither investigation included a detailed study to ascertain the cardinal temperatures for spore germination by R. pusillus. Because of the economic and medical importance of this fungus it was believed that it would be worthwhile to determine its cardinal temperatures for spore germination as well as other factors affecting spore germination.


Percent Germination Spore Germination Germ Tube Spore Concentration Thermophilic Fungus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Adams, P.R. (1981). Amylase production by Mucor pusillus and Humicola lanuginosa as related to mycelial growth. Mycopathologia, 76, 97–101.CrossRefGoogle Scholar
  2. Celerin, E.M. and Fergus, C.L. (1971). Effects of nutrients, temperature and relative humidity on germination and longevity of the ascospores of Chaetomium thermophile var. coprophile. Mycologia, 63, 1030–1045.CrossRefGoogle Scholar
  3. Cochrane, V.W. (1958). Physiology of Fungi. 524 pp. John Wiley & Sons, New York.Google Scholar
  4. Cooney, D.G. and Emerson, R. (1964). Thermophilic Fungi. 188 pp. W.H. Freeman & Co., San Francisco.Google Scholar
  5. Deploey, J.J. (1985). The influence of atmosphere composition and nutrients on the germination of Rhizomucor pusillus sporangiospores. Mycologia, 77, 97–102.CrossRefGoogle Scholar
  6. Deploey, J.J. and Fergus, C.L. (1975). Growth and sporulation of thermophilic fungi and actinomycetes in O2-N2 atmospheres. Mycologia, 67, 780–797.CrossRefGoogle Scholar
  7. Deploey, J.J. and Gautam, S.P. (1987). Cardinal temperatures for germination of Rhizomucor miehei sporangiospores. Proc. Pennsylvania Acad. Sci., 61, 59–60.Google Scholar
  8. Fergus, C.L. (1964). Thermophilic and thermotolerent molds and actinomycetes of mushroom compost during peak heating. Mycologia, 56, 267–284.CrossRefGoogle Scholar
  9. Fergus, C.L. and Deiwiche, C.J. (1975). The effects of nutrients and temperature on germination and viability of the ascospores of Chaetomium rectopilum. Mycologia, 67, 722–732.CrossRefGoogle Scholar
  10. Jack, M.A. and Tansey, M.R. (1977). Growth, sporulation, and germination of spores of thermophilic fungi incubated in sun-heated soil. Mycologie, 69, 109–117.CrossRefGoogle Scholar
  11. Sinden, J.W. and Hauser, Erica (1953). The nature of the composting process and its relation to short composting. Mushroom Science, 2, 123–130.Google Scholar
  12. Streets, B.W. and Ingle, M.B. (1972). The effect of temperature on spore germination and growth of Mucor miehei in submerged culture. Canad. J. Microbiol., 18, 975–979.CrossRefGoogle Scholar
  13. Sussman, A.S. (1976). Activators of fungal spore germination. In: The Fungal Spore, pp. 101–139 ( D.J. Weber and W.M. Hess, ed.), John Wiley & Sons, New York.Google Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • J. J. Deploey
    • 1
  1. 1.Department of BiologyPennsylvania State University, York CampusYorkUSA

Personalised recommendations