Utilization of simple phenolics for dinitrogen fixation by soil diazotrophic bacteria

A microaerobic diazotrophic bacterium tentatively identified as a Pseudomonas species was isolated from a forest soil. Its nitrogenase (C₂H₂ reduction) activity in liquid medium was significantly supported by phenolic compounds when compared with glucose-, mannitol- or malate-supported activity. The...

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Bibliographic Details
Published in:Plant and Soil [PLANT SOIL.]. 1986 1986-01, Vol.90 (1/3), p.141-150
Main Author: CHAN, YIU-KWOK
Format: Article
Language:English
Subjects:
Acid soils
Agrology
Carbon
Forest soils
Liquids
Nitrogen fixation
nitrogen-fixing bacteria
phenol
Pseudomonas
Session 2: Microbial ecology of diazotrophic bacteria
Soil bacteria
Soil biochemistry
Substrate specificity
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Summary:A microaerobic diazotrophic bacterium tentatively identified as a Pseudomonas species was isolated from a forest soil. Its nitrogenase (C₂H₂ reduction) activity in liquid medium was significantly supported by phenolic compounds when compared with glucose-, mannitol- or malate-supported activity. The utilization of phenolics was dependent on substrate induction and the appropriate oxygen concentration. At a pO₂ of 0.05 protocatechuate was a better carbon source for N₂ fixation than glucose. In the case of Lignobacter protocatechuate was a better carbon source for N₂ fixation than glucose at pO₂ 0.2 but not at pO₂ 0.05. It is suggested that certain monomeric phenols can support nitrogenase activities in many carbonlimited soil environments.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF02277393