Open AccessMutants of Azospirillum brasilense altered in nitrogen fixation
Author(s) -
Barberio Claudia,
Bazzicalupo Marco,
Federici Giorgio,
Gallori Enzo,
Polsinelli Mario
Publication year - 1983
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1983.tb00148.x
Subject(s) - azospirillum brasilense , nitrogenase , nitrogen fixation , glutamate synthase , glutamine synthetase , mutant , biochemistry , enzyme , microbial inoculant , adenylylation , nitrogen , glutamine , biology , diazotroph , nitrogen assimilation , microbiology and biotechnology , chemistry , bacteria , biosynthesis , genetics , gene , organic chemistry , amino acid
Four revertants with Nif + phenotype obtained from asm mutants of Azospirillum brasilense have been studied in respect to nitrogenase, enzymes of ammonia assimilation and utilization of poor nitrogen sources. The results indicate that nitrogenase expression is related to the activity of glutamate synthase and to the adenylylation of glutamine synthetase; moreover, nitrogen fixation seems correlated with the activities of the enzymes involved in the utilization of poor nitrogen sources.