Resumo
Among 327 strains of Actinomycetes isolated in 1958 during the four seasons, 97,85 per cent had proteolytic activity. Most of the strains wete isolated in spring time. About the organic matter no conclusions were reached, because it was mantained constant with a average value of 4.099. So the different number of the strains was a consequence of the season. We can conclude that the Latosol red-yellow soil, from where these microorganisms were isolated, has a strong proteolytic capacity, since this reaction is very strong in a maximum limit of sixteen days during the spring season. Consequently, this soil has one of the most importante caracteristics of fertility. The role of the Actinomycetes in the soil is so important of the soil microflora.
Instituto Zimotécnico. Escola Superior de Agricultura «Luiz de Queiroz»
SUMMARY
Among 327 strains of Actinomycetes isolated in 1958 during the four seasons, 97,85 per cent had proteolytic activity.
Most of the strains wete isolated in spring time.
About the organic matter no conclusions were reached, because it was mantained constant with a average value of 4.099. So the different number of the strains was a consequence of the season.
We can conclude that the Latosol red-yellow soil, from where these microorganisms were isolated, has a strong proteolytic capacity, since this reaction is very strong in a maximum limit of sixteen days during the spring season.
Consequently, this soil has one of the most importante caracteristics of fertility.
The role of the Actinomycetes in the soil is so important of the soil microflora.
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LITERATURA CITADA
Recebido para publicação em 5/7/60.
- 1 - BALDACCI, E., G. F, Comaschi, T. Scotti and C. Spalla 1953 - General criteria for the systematics of genera and species of Actinomycetes (Streptomyces) and Micromonospora, Symposium Actinomycetales, morfologia, biologia e sistemática, VI Congresso Internazionale di Microbiologia, p. 36.
- 2 - WAKSMAN, S. A. 1916 - Bacteria, actinomyces and fungi in the soil, J. Bact., 1: 101.
- 3 - WAKSMAN, S. A., and R. E. Curtis 1918 - The occurrence of actinomycetes in the soil, Soil Sci., 6: 309-319.
- 4 - WAKSMAN, S. A. 1950 - The Actinomycetes, Annales Cryptogamiciet Phytopathologici, vol. 9, Waltham, Mass. U. S. A., publ. by Chronica Botanica Co., p. 134.
Ocorrência de Actinomicetos com atividade proteolitica, em um solo cultivado
Datas de Publicação
-
Publicação nesta coleção
10 Set 2012 -
Data do Fascículo
1960
Histórico
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Recebido
05 Jul 1960