Affiliation:
1. Laboratory of Soil Microbiology, Department of Agronomy, Cornell University, Ithaca, New York
Abstract
Hirsch
, P. (Cornell University, Ithaca, New York), L.
Overrein, and M. Alexander
. Formation of nitrite and nitrate by actinomycetes and fungi. J. Bacteriol.
82:
442–448. 1961.—Nitrite was produced by strains of
Mycobacterium, Nocardia, Streptomyces, Micromonospora
, and
Streptosporangium
in media containing ammonium phosphate as the sole nitrogen source. The quantity of nitrite formed was small, and the concentration was affected by pH and by the relative levels of carbon and nitrogen.
Aspergillus flavus
produced little nitrite from ammonium but formed in excess of 100 parts per million of nitrate-nitrogen. Peroxidase activity and heterotrophic nitrification were reduced in acid conditions, but mycelial development of the fungus was not markedly affected. The inability of
A. flavus
to form nitrate and nitrite at low pH appears to result from a selective effect of pH upon nitrification rather than being a consequence of the decomposition of nitrogenous intermediates.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
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