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Induction of nitrate assimilation in the cyanobacterium Anabaena variabilis
Author(s) -
Avissar Yael J.
Publication year - 1985
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1985.tb02826.x
Subject(s) - anabaena variabilis , nitrate reductase , nitrate , assimilation (phonology) , enzyme , cyanobacteria , nitrogen assimilation , chemistry , biochemistry , anabaena , chloramphenicol , biology , bacteria , antibiotics , genetics , linguistics , philosophy , organic chemistry
Filaments of Anabaena variabilis Kütz strain ATCC 29413 grown in the absence of nitrate contain nitrate reductase that is active in permeabilized filaments, but not in intact, living filaments until they have been incubated for about 40 min in the presence of nitrate. The delayed acquisition of the ability to reduce nitrate is insensitive to chloramphenicol. Thus, switching on of enzyme activity in the presence of nitrate does not involve protein synthesis and nitrate reductase activity is not regulated by the amount of enzyme present.