1887

Abstract

A mathematical model for hyphal growth and branching is described which relates cytological events within hyphae to mycelial growth kinetics. Essentially the model quantifies qualitative theories of hyphal growth in which it is proposed that vesicles containing wall precursors and/or enzymes required for wall synthesis are generated at a constant rate throughout a mycelium and travel to the tips of hyphae where they fuse with the plasma membrane, liberating their contents into the wall and increasing the surface area of the hypha to give elongation. The hypothesis that there% a duplication cycle in hyphae which is equivalent to the cell cycle observed in unicellular micro-organisms is also included in the model. Predictions from the model are compared with experimentally observed growth kinetics of mycelia of and . The finite difference model which was constructed is capable of predicting changes in hyphd length and in the number and positions of branches and septa on the basis of changes in vesicle and nuclear concentration. Predictions were obtained using the model which were in good agreement with experimentally observed data.

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/content/journal/micro/10.1099/00221287-111-1-153
1979-03-01
2024-11-12
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References

  1. ALBERGHINA L., MARTEGANI E. Steady and transitory states in cellular growth.. Cybernetica 1976; 19:229–248
    [Google Scholar]
  2. BARTNICKI-GARCIA S. Microbial differentiation.. Symposia of the Society for General Microbiology 1973; 23:245–268
    [Google Scholar]
  3. BULL A. T., TRINCI A. P. J. Physiology and metabolic control of fungal growth.. Advances in Microbial Physiology 1977; 15:1–84
    [Google Scholar]
  4. COHEN D. Microbial differentiation.. Nature London; 1967; 216:246–248
    [Google Scholar]
  5. COLLINGE A.J., TRINCI A . P. J. Hyphal tips of wild type and spreading colonial mutants of Neurospora crassa.. Archives of’ Microbiology 1974; 99:353–368
    [Google Scholar]
  6. COLLINGE A.J., MILES E . A., TRINCI A . P. J. Ultrastructure of Penicillium chrysogenum hyphae from colonies and chemostat cultures.. Transactions of British Mycological Society 1973; 70:401–408
    [Google Scholar]
  7. DEPPE C. S. Protein degradation in Schizophyllum commune.. Ph.D. thesis 1973 U.S.A.: University of Harvard;
    [Google Scholar]
  8. FIDDY C., TRINCI A . P. J. Mitosis, septation and the duplication cycle in Aspergillusnidulans.. Joiirnal of General Microbiology 1976a; 97:169–184
    [Google Scholar]
  9. FIDDY C., TRINCI A. P. J. Nuclei, septation, branching and growth of Geotrichum candidum.. Symposia of the Society for General Microbiology 1976b; 97:185–192
    [Google Scholar]
  10. GULL K. Mycelial branch patterns of Thamnidium elegans. Transactions of the British Mycological Society 1975; 64:321–324
    [Google Scholar]
  11. JENNINGS D.H., THORNTON J.D., GALPIN M.F.J, COGGINS C.R. Translocation infungi.. Symposia of the Society for Experimental Biology 1974; 28:139–156
    [Google Scholar]
  12. KOCH A.L. The kinetics of mycelial growth. Journal of General Microbiology 1975; 89:209–216
    [Google Scholar]
  13. LEOPOLD L.B. Trees and streams: the efficiency of branching patterns.. Journcil of Theoretical Biology 1971; 31:339–354
    [Google Scholar]
  14. MCCLURE W.K., PARK D ., ROBINSON P.M. Apical organization in somatic hyphae of fungi. Journal of General Microbiology 1968; 50:177–182
    [Google Scholar]
  15. PLOMLEY N.J.B. Formation of the colony in the fungus Chaetomium.. Australian Journal of Biological Sciences 1959; 12:53–64
    [Google Scholar]
  16. ROBINSON P.M. Autotropism in fungal spores and hyphae.. Botanical Review 1973; 39:367–384
    [Google Scholar]
  17. TOPIWAL H.H. Mathematical models in microbiology. Methods in Microbiology 1973; 8:35–59
    [Google Scholar]
  18. TRINCI A. P. J. Kinetics of the growth of mycelial pellets of Aspergillus nidzilans.. Archiv fũr Mikrobiologie 1970; 73:353–367
    [Google Scholar]
  19. TRINCI A.P.J. Influence of the peripheral growth zone on the radial growth rate of fungal colonies. Journal of General Microbiology 1971; 67:325–344
    [Google Scholar]
  20. TRINCI A.P.J. A study of the kinetics of hyphal extension and branch initiation of fungal mycelia.. Journal of General Microbiology 1974; 81:225–236
    [Google Scholar]
  21. TRINCI A.P.J., COLLINGE A.J. Wall and hyphal growth. wall growth in Nmrospora crassa and Geotrichunz candidurn. Journal of General Microbiology 1975; 91:355–367
    [Google Scholar]
  22. TRINCI A.P.J. The duplication cycle and vegetative development in moulds.. in The Filamentous Fungi, pp 1978a; iii132–163 Smith J. E., Berry. D. R. London: Edward Arnold;
    [Google Scholar]
  23. TRINCI A.P.J. Wall and hyphal growth.. Scienco Progress 1978b; 65:75–99
    [Google Scholar]
  24. YANAGITA T., KOGANE F. Cellula differentiation of growth mold colonies with special reference to phosphorus metabolism.. Journal of Gm?ral and Applied Microbiology 1963; 9:313–330
    [Google Scholar]
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