The impact of elevated atmospheric CO2 on microbial functions in soil is mainly indirect since the increase in atmospheric CO2 stimulates photosynthetic activity of C3 plants, rhizodeposition and consequent activity and growth of rhizosphere microorganisms, because most of soil microorganisms are generally C-limited. Other indirect effects caused by greater below-ground C allocations concern the enhancement of soil structure and increased uptake of nutrients and water by plants. Contrasting results on activity, composition and size of soil microbial communities and on the interaction between microorganisms and plants and fauna depend on the different plant-soil systems studied and the different techniques used. Mycorrhizal infection of plant roots under elevated CO2 concentration is generally stimulated due to increased C allocation to roots but future research should address the central role of mycorrhizae in the context of global change, as they appear to be a keystone in the CO2 -related response.
Potential Impacts of Climate change on Microbial Function in Soil The Effect of Elevated CO2 Concentration / Paolo Nannipieri. - STAMPA. - (2011), pp. 201-211. [10.1002/9780470960257]
Potential Impacts of Climate change on Microbial Function in Soil The Effect of Elevated CO2 Concentration
NANNIPIERI, PAOLO
2011
Abstract
The impact of elevated atmospheric CO2 on microbial functions in soil is mainly indirect since the increase in atmospheric CO2 stimulates photosynthetic activity of C3 plants, rhizodeposition and consequent activity and growth of rhizosphere microorganisms, because most of soil microorganisms are generally C-limited. Other indirect effects caused by greater below-ground C allocations concern the enhancement of soil structure and increased uptake of nutrients and water by plants. Contrasting results on activity, composition and size of soil microbial communities and on the interaction between microorganisms and plants and fauna depend on the different plant-soil systems studied and the different techniques used. Mycorrhizal infection of plant roots under elevated CO2 concentration is generally stimulated due to increased C allocation to roots but future research should address the central role of mycorrhizae in the context of global change, as they appear to be a keystone in the CO2 -related response.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.