Substrate Induced Growth Response of Soil and Rhizosphere Microbial Communities Date: Friday, September 30 @ 09:15:00 MDT Topic: Impacts of High CO2 on Ecosystems by Sergei Biagodatsky The maximal specific growth rate of microorganisms from rhizospheres of Populus deltoides grown under normal CO2 concentration in the atmosphere (400 ppm) was lower compared to the assessments made for plots under elevated CO2 (800 and 1200 ppm). A similar conclusion was made for microbial communities from soil under winter wheat and sugar beets grown under 370 and 550 ppm CO2 in the atmosphere. Three to four years fumigation of field plots with elevated CO2 has been shown to result in the formation of rhizosphere microbial communities characterized by faster specific growth rates as compared to microbial community under control plants. Links to Abstract Link to Slides This article comes from The 7th International CO2 Conference Web Site http://icdc7.cmdl.noaa.gov/ The URL for this story is: http://icdc7.cmdl.noaa.gov//modules.php?name=News&file=article&sid=79