The interaction of soil phototrophs and fungi with pH and their impact on soil CO₂, CO¹⁸O and OCS exchange.

ABSTRACT: The stable oxygen isotope composition of atmospheric CO₂ and the mixing ratio of carbonyl sulphide (OCS) are potential tracers of biospheric CO₂ fluxes at large scales. However, the use of these tracers hinges on our ability to understand and better predict the activity of the enzyme carbonic anhydrase (CA) in different soil microbial groups, including phototrophs. Because different classes of the CA family (α, β and γ) may have different affinities to CO₂ and OCS and their expression should also vary between different microbial groups, differences in the community structure could impact the 'community-integrated' CA activity differently for CO₂ and OCS. Four soils of different pH were incubated in the dark or with a diurnal cycle for forty days

SUBMITTER: Sauze J 

PROVIDER: S-EPMC5666291 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature