Open AccessCorrelation between nitrate uptake rate and nitrate inhibition of nitrogenase activity in Azotobacter chroococcum
Author(s) -
Cejudo F.J.,
Paneque A.
Publication year - 1987
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.1574-6968.1987.tb02088.x
Subject(s) - azotobacter chroococcum , nitrate , nitrite , nitrogenase , nitrogen assimilation , nitrogen fixation , chemistry , nitrogen , azotobacter , biochemistry , environmental chemistry , biology , horticulture , bacteria , organic chemistry , genetics , inoculation
Abstract In Azotobacter chroococcum cells exhibiting both nitrate (nitrite) assimilation ability and nitrogen fixation capability, the extent of nitrogenase activity inhibition by nitrate or nitrite positively correlated ( r = 0.922) with the rate of nitrate (nitrite) taken up by the cells. These results corroborate our previous proposal that the anion must be assimilated to exert its inhibitory effect, and indicate that the inhibition is a graded rather than an all‐or‐none process.