J P Schimel1, W J Scott, K Killham. 1. Department of Plant and Soil Science, University of Aberdeen, Aberdeen AB9 2UE, Scotland.
Abstract
The effects of water potential on the cellular compositions of a soil bacterium and a fungus were examined by growing the organisms in media with various KCl concentrations. In media containing up to 1 M KCl, C/N ratios in Aspergillus flavus increased significantly, while those for a Pseudomonas sp. did not. For both organisms, the proportions of cellular C and N in cytoplasm increased by a factor of 10 as salinity increased from 0 to 1 M KCl. Such compositional changes have implications for microbial biomass dynamics in soils of varying water potential and for biomass measurement by chloroform fumigation.
The effects of water potential on the cellular compositions of a soil bacterium and a fungus were examined by growing the organisms in media with various n class="Chemical">KCl concentrations. In media containing up to 1 M KCl, C/N ratios in Aspergillus flavus increased significantly, while those for a Pseudomonas sp. did not. For both organisms, the proportions of cellular C and N in cytoplasm increased by a factor of 10 as salinity increased from 0 to 1 M KCl. Such compositional changes have implications for microbial biomass dynamics in soils of varying water potential and for biomass measurement by chloroform fumigation.
Authors: Nicholas J Bouskill; Tana E Wood; Richard Baran; Zaw Ye; Benjamin P Bowen; HsiaoChien Lim; Jizhong Zhou; Joy D Van Nostrand; Peter Nico; Trent R Northen; Whendee L Silver; Eoin L Brodie Journal: Front Microbiol Date: 2016-04-20 Impact factor: 5.640