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Influence of phosphate concentration on the respiratory activity of Azotobacter vinelandii
Author(s) -
Haldenwang L.,
Behrens U.
Publication year - 1983
Publication title -
zeitschrift für allgemeine mikrobiologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0044-2208
DOI - 10.1002/jobm.19830230806
Subject(s) - azotobacter vinelandii , phosphate , oxidative phosphorylation , respiration , biochemistry , oxygen , chemistry , phosphorylation , azotobacter , substrate (aquarium) , cellular respiration , respiratory system , electron transport chain , biology , bacteria , nitrogenase , botany , organic chemistry , mitochondrion , nitrogen , nitrogen fixation , ecology , anatomy , genetics
Abstract Azotobacter vinelandii was grown in batch cultures supplied with ammonia as an N‐source and phosphate at limiting concentration. After phosphate depletion the respiratory rate was affected in a characteristic way. The oxygen consumption during growth and the phase following growth was substantially higher than in cultures amply supplied with phosphate. It is suggested that phosphate limitation impairs the oxidative phosphorylation and stimulates the substrate phosphorylation which leads to a higher degree of respiratory NAD(P)H oxidation due to changes in the branched electron transport system.