Resumo
Some strains of Actinomycetes showed variation in its activity to reduce nitrate to nitrite when the nutrient solution was modified in relation to the major elements. One of these strains incapable of !this reaction showed a strong activity in nutrient solution without K and little activity without P. Otherwise strains capable of reducing nitrate to nitrite had this capacity decreased in absence of each one of the following elements: K, P, Mg, e S. K showed to be the most important of them, followed by P, Mg e S. Without any of these elements the pH of the nutrient solution has to be increased from 5,5 to 6,5 for the strains capable to reduce nitrate to nitrite preserve its capacity. The time for the reaction is increased from 5 to 8 days and the amount of nitrite obtained is small.
S. Joly
Instituto Zimotécnico.Escola Superior de Agricultura «Luiz de Queiroz»
SUMMARY
Some strains of Actinomycetes showed variation in its activity to reduce nitrate to nitrite when the nutrient solution was modified in relation to the major elements.
One of these strains incapable of !this reaction showed a strong activity in nutrient solution without K and little activity without P. Otherwise strains capable of reducing nitrate to nitrite had this capacity decreased in absence of each one of the following elements: K, P, Mg, e S. K showed to be the most important of them, followed by P, Mg e S.
Without any of these elements the pH of the nutrient solution has to be increased from 5,5 to 6,5 for the strains capable to reduce nitrate to nitrite preserve its capacity. The time for the reaction is increased from 5 to 8 days and the amount of nitrite obtained is small.
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LITERATURA CITADA
Recebido para publicação em 5/7/60.
- 1 - KRAINSKY, A. 1914 - Die Aktinomyceten und ihre Bedeutung in the Natur, Centbl. Bakt., II 41: 639-688.
- 2 - TRELEASE, S. A. and H. M. Trelease 1935 - Changes in hidrogen-.' ion concentration of culture solutions containing nitrate and ammonium nitrogen, Am J. Bot, 22: 520-542.
- 3 - WAKSMAN, S. A. 1919 - Studies in the metabolism of actinomyce-tes, T. Bact., 4: 189-216.
Cinética
Datas de Publicação
-
Publicação nesta coleção
10 Set 2012 -
Data do Fascículo
1960
Histórico
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Recebido
05 Jul 1960
