Open AccessUninduced ammonia release by the nitrogen‐fixing cyanobacterium Anabaena
Author(s) -
Subramanian G.,
Shanmugasundaram S.
Publication year - 1986
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.1574-6968.1986.tb01784.x
Subject(s) - anabaena , ammonia , cyanobacteria , nitrogen , strain (injury) , nitrate , nitrogen fixation , anabaena variabilis , nitrogenase , biology , chemistry , microbiology and biotechnology , biochemistry , bacteria , ecology , organic chemistry , genetics , anatomy
Certain strains of the nitrogen‐fixing cyanobacterium Anabaena were found to release varying quantities of ammonia without any induction, both in the presence and absence of combined nitrogen (nitrate) in the medium, during the different phases of their growth. In general, growth and ammonia release were comparable in both media, although there were strain differences. 3 patterns of ammonia release were observed in different strains during the growth period. They were: (1) release pattern parallel to the growth curve; (2) a continuous increase in release; and (3) release showing a bimodal curve.