Abstract
Using the antagonistic actinomycetes isolated from theFusarium “wilt-sick” and “wilt-free” cotton field soils it was possible to confirm production of antibiotic substance(s) by them inin vitro studies. They inhibited spore germination and radial growth of the cotton wilt pathogenFusarium vasinfectum Atk. In addition, various adverse morphological changes were brought about by them on the fungal mycelium. Most of the actinomycetes were seen to lyse both live and heat-killed bud-cells of the pathogen. Similar effect was also observed in soilin situ.
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References
Arjunarao, V... “Direct observation of fungal mycelia,”Curr. Sci., 1969,38, 225.
----- .. “Biological control of cotton wilt. Soil Fungistasis and Antibiosis in cotton fields” (in press).
Carter, H. P. and Lockwood, J. L. “Lysis of fungi by soil microorganisms and fungicides including antibiotics,”Phytopathology, 1957,47, 154–61.
Desai, A. J. and Dhala, S.A... “Bacteriolysis by thermophilic actinomycetes,”Antonie van Leeuvenhoek, 1967,33, 56–62.
Jackson, R. M... “Antibiosis and Fungistasis of soil microorganisms” pp. 363–73, In F. Baker and W.C. Snyder (eds.)Ecology of Soil-borne Plant Pathogens. Prelude to Biological Control, John Murrey. London, 1965.
Links, J., Rombouts, J. E. and Keulen, P... “The ‘bulging factor,’ a fungistatic antibiotic produced by aStreptomyces strain with evidence of an active water excreting mechanism in fungi,”J. gen. Microbiol., 1957,17, 596–601.
Lockwood, J. L. and Lingappa, B. T. “Fungitoxicity of sterilized soil inoculated with soil microflora,”Phytopathology, 1963,53, 917–20.
Raghu, K. .. “Soil conditions and root diseases with special reference to Biotic factors,”Doctoral Thesis, University of Madras, 1963.
Salton, M. R. J... “Isolation ofStreptomyces spp. capable of decomposing preparations of cell walls from various microorganisms and a comparison of their lytic activities with those of certain actinomycetes and myxobacteria,”J. gen. Microbiol., 1955,12, 25–30.
Stevenson, I. L... “Antibiotic production by actinomycetes in soil demonstrated by morphological changes induced inHelminthosporium sativum,”Nature, Lond., 1954,174, 598.
Stevenson, I. L... “Antibiotic activity of actinomycetes in soil and their controlling effects on root rot of wheat,”J. gen. Microbiol., 1956a,14, 440–48
—————.. “Antibiotic activity of actinomycetes in soil as demonstrated by direct observation techniques,” Ibid., 1956b,15, 372–80.
Stover, R. H... “Flood-fallowing for eradication ofFusarium oxysporum f.cubense. II. Some factors involved in fungus survival,”Soil Sci., 1954,77, 401–14.
Subbulakshmi, T. A. R. .. “Rhizosphere and soil-borne diseases,”Doctoral Thesis, University of Madras, 1966.
Vasudeva, R. S. and Govindaswamy, C. V... “Studies on the effect of associated soil microflora onFusarium undum, the fungus causing wilt of pigeon pea, with special reference to its pathogenicity,”Ann. appl. Biol., 1953,40, 573–83.
Wang, C. S. and Teresa, G. W... “Streptomyces isolates capable of lysingCandida albicans,”Can. J. Microbiol., 1966,12, 1297–99.
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Communicated by Prof. T. S. Sadasivan,f.a.sc.
Memoir No. 92 from the Centre for Advanced Study in Botany.
Part of the thesis of the author approved for the degree of Doctor of Philosophy by the University of Madras, 1968.
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Arjunarao, V. Biological control of cotton wilt. Proc. Indian Acad. Sci. 74, 16–28 (1971). https://doi.org/10.1007/BF03050458
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DOI: https://doi.org/10.1007/BF03050458