1887

Abstract

Summary: A study has been made, using a plating technique, of the fungi occurring in acid sandy podsol soils and of their distribution at different levels of the soil profile. The most widespread species, characteristic of this type of soil, included: and A number of other species were locally abundant, including sp., sp. (roscum series), and

The plate counts of viable fungal units decreased sharply from upper to lower levels, though there was occasionally a secondary maximum in the upper part of the B horizon. Most species were characteristically found most abundantly in upper layers of the A horizon, but was notable for its abundance at much lower levels; in several of the profiles examined it was isolated in almost pure culture from the B horizon.

Of the sixty-five species isolated, about half produced antibiotics. Most of these were toxic to fungi and bacteria; only a few cases of specific antifungal or antibacterial activity were encountered. The Phycomycetes differed from other groups in that none produced antifungal substances. The capacity to produce antifungal antibiotics appears to be correlated with the distribution of species; of the widespread and locally abundant fungi, 45% produced such antibiotics as compared with 15% of the rare fungi. Nevertheless, certain widespread species (e.g. ) did not produce antifungal antibiotics, so it cannot be considered to be a necessary character of widespread soil fungi. There is some evidence that such widespread non-producers of antibiotics are relatively resistant to the antibiotics produced by other species.

An attempt has been made to group the fungi isolated into Burges’ ecological categories of ‘sugar-fungi’ and ‘humus-fungi’ on the basis of their capacity to attack and utilize carboxymethylcellulose (CMC). Only 26% of the fungi were unable to utilize CMC, Phycomycetes being prominent among these. Whereas 35% of the rare fungi and 54% of locally abundant fungi were ‘sugar-fungi’, only 17% (all Phycomycetes) of the widespread fungi were ‘sugar-fungi’.

These results are believed to lend support to the view that antibiotic production is of ecological significance to soil fungi. They also provide information which can form the basis of an experimental search for more direct evidence.

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1953-10-01
2024-12-09
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References

  1. Anslow W.K., Raistrick H., Smith G. 1943; Antifungal substances from moulds.Part I. Patulin, a metabolic product of Penicillium patulum Bainier and P. expansum (Link) Thom. Chem. Ind., Lond. p. 236:
    [Google Scholar]
  2. Birkinshaw J.H. 1952; Studies in the biochemistry of micro-organisms.Pali- tantin.Part 2.Further derivatives and degradation products. Biochem. J. 51 (2):271–5
    [Google Scholar]
  3. Brian P.W. 1946; Production of gliotoxin by Penicillium terlikowskii Zal. Trans. Brit, my col. Soc. 29:211
    [Google Scholar]
  4. Brian P.W. 1949a; The production of antibiotics by soil micro-organisms. Chem. Ind., Lond. p.: 391:
    [Google Scholar]
  5. Brian P.W. 1949b; The production of antibiotics by micro-organisms in relation to biological equilibria in soil. Symp. Soc. exp. Biol. 3:357
    [Google Scholar]
  6. Brian P.W. 1949c; Studies on the biological activity of griseofulvin. Ann. Bot.(N.S.) 13:59
    [Google Scholar]
  7. Brian P.W. 1951; Antibiotics produced by fungi. Bot. Rev. 17:357
    [Google Scholar]
  8. Brian P.W., Curtis P.J., Humming H.G. 1946; A substance causing abnormal development of fungal hyphae produced by Penicillium janczewskii Zal. I. Biological assay, production and isolation of ‘curling factor’. Trans. Brit, my col. Soc. 29:173
    [Google Scholar]
  9. Brian P.W., Curtis P.J., Hemming H.G. 1947; Glutinosin: a fungistatic metabolic product of the mould Metarrhizium glutinosum S. Pope. Proc. Roy. Soc. (B) 135106
    [Google Scholar]
  10. Brian P.W., Curtis P.J., Hemming H.G. 1949; A substance causing abnormal development of fungal hyphae produced by Penicillium janczewskii Zal. III. Identity of ‘curling-factor’ with griseofulvin. Trans. Brit, mycol. Soc. 32:30
    [Google Scholar]
  11. Brian P.W., Curtis P.J., Hemming H.G., Jefferys E.G., Unwin C.H., Wright J.M. 1951; Altemaric acid; a biologically active metabolic product of Altemaria solani (Ell.& Mart.)Jones & Grout; its production, isolation and antifungal properties. J. gen. Microbiol. 5:619
    [Google Scholar]
  12. Brian P.W., Curtis P.J., Hemming H.G., Mcgowan J.C. 1946; The production of viridin by pigment-forming strains of Trichoderma viride. Ann. appl. Biol. 33:190
    [Google Scholar]
  13. Brian P.W., Curtis P.J., Howland S.R., Jefferys E.G., Raudnitz H. 1951; Three new antibiotics from a species of Gliocladium. Experientia 7:266
    [Google Scholar]
  14. Brian P.W., Hemming H.G. 1945; Gliotoxin, a fungistatic metabolic product of Trichoderma viride. Ann. appl. Biol. 32:214
    [Google Scholar]
  15. Brian P.W., Hemming H.G., Mcgowan J.C. 1945; Origin of a toxicity to mycorrhiza in Wareham Heath soil. Nature; Lond.: 155637
    [Google Scholar]
  16. Burges A. 1939; Soil fungi and root infection. Broteria 8:64
    [Google Scholar]
  17. Curtis P.J., Duncanson L.A. 1952; A structural relationship between frequentin and palitantin. Biochem. J. 51:276
    [Google Scholar]
  18. Curtis P.J., Hemming H.G., Smith W.K. 1951; Frequentin: an antibiotic produced by some strains of Penicillium frequentans Westling. Nature; Lond.: 167557
    [Google Scholar]
  19. Curtis P.J., Hemming H.G., Unwin C.H. 1951; Albidin, an antibiotic red pigment from Penicillium albidum. Trans. Brit, mycol. Soc. 34:332
    [Google Scholar]
  20. Curtis P.J., Grove J.F. 1947; A fungistatic and bacteriostatic red pigment produced by a strain of the Penicillium nigricans-janczewskii series. Nature; Lond.: 160574
    [Google Scholar]
  21. Garrett S.D. 1950; Ecology of the root inhabiting fungi. Biol. Rev. 25:220
    [Google Scholar]
  22. Garrett S.D. 1951; Ecological groups of soil fungi: a survey of substrate relationships. New Phytol. 50:149
    [Google Scholar]
  23. Gatenby J.B., Beams H.W. 1950 The Microtomist’s Vade-mecum., 11th ed.. London:: J. and A. Churchill Ltd.;
    [Google Scholar]
  24. Grove J.F., Brian P.W. 1951; Identity of frequentic acid and citromycetin. Nature; Lond.: 167995
    [Google Scholar]
  25. Grove J.F., Mcgowan J.C. 1947; Identity of griseofulvin and ‘ curling factor’. Nature; Lond.: 160574
    [Google Scholar]
  26. Grove J.F., Macmillan J., Mulholland T.P.C., Rogers M.A.T. 1952; Griseofulvin. Part IV. Structure. J. chem. Soc. p. 3977:
    [Google Scholar]
  27. Jefferys E.G. 1952; The stability of antibiotics in soils. J. gen. Microbiol. 7:295
    [Google Scholar]
  28. Linnemann G. 1941 Die Mucorineen-Gattung Mortierella Coemans. Jena:: Gustav Fischer.;
    [Google Scholar]
  29. Macmillan J. 1951; Dechlorogriseofulvin-a metabolic product of Penicillium griseofulvum Dierckx and Penicillium janczewskii Zal. Chem. Ind., Lond. p. 719:
    [Google Scholar]
  30. Naumov N.A. 1939 Clés des Mucorinées. Paris:: Paul Lechevalier.;
    [Google Scholar]
  31. Neilson-Jones W. 1941; Biological aspects of soil fertility. J. agric. Sci. 31:379
    [Google Scholar]
  32. Raper K.B., Thom C. 1949 A Manual of the Penicillin. London:: Baillière, Tindall and Cox.;
    [Google Scholar]
  33. Rayner M.C. 1945; Origin of a toxicity to fungi in Wareham Heath soil. Nature; Lond.: 156174
    [Google Scholar]
  34. Siu R.G.H. 1951 Microbial Decomposition of Cellulose. New York:: Reinhold Publishing Corporation.;
    [Google Scholar]
  35. Thom C., Raper K.B. 1945 A Manual of the Aspergilli. London:: Baillière, Tindall and Cox.;
    [Google Scholar]
  36. Vischer E.B. 1953; The structures of aurantio- and rubro-gliocladin and gliorosein. J. chem. Soc. p. 815:
    [Google Scholar]
  37. Waksman S.A. 1917; Is there any fungus flora of the soil?. Soil Sci. 3:565
    [Google Scholar]
  38. Warcup J.H. 1951; The ecology of soil fungi. Trans. Brit, mycol. Soc. 34:376
    [Google Scholar]
  39. Wright J.M. 1952; Production of gliotoxin in unsterilized soil. Nature; Lond.: 170673
    [Google Scholar]
  40. Zycha H. 1935 Mucorineae. (Bd. vi: Kryptogamenflora der Mark Brandenburg.) Leipzig:: Gebrüder Bomtraeger;
    [Google Scholar]
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