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Elevated CO2: Plant associated microorganisms and carbon sequestration

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Title Elevated CO2: Plant associated microorganisms and carbon sequestration
Elevated CO2: Plant associated microorganisms and carbon sequestration
 
Creator ICAR_CRIDA
 
Subject Elevated CO2, Climate change, Rhizodeposition, Plant associated microorganisms, C-sequestration
 
Description Not Available
Alterations in plant rhizodeposition under elevated CO2 (eCO2) are likely to influence below-ground
plant–microbe interactions and soil C dynamics. There are studies on influence of elevated CO2 on soil
microorganisms and below-ground microbial processes. However there is general lack of information on
how altered plant–microbe interactions under eCO2 will influence belowground C-sequestration. In the
present review we focus on the greenhouse gas CO2 with relevance to its effect on plant associated
beneficial and pathogenic microorganisms in terrestrial ecosystems. Role of these microorganisms in
belowground nutrient cycling and soil aggregation is discussed with reference to soil C-sequestration.
This review demonstrates that eCO2 influence the richness, composition and structure of soil microbial
community and the influence is more on active microbial communities and in the vicinity of roots. High
C:N ratio under eCO2 favors fungi with wider C:N ratio and nutrient acquisition ability and biological
nitrogen
fixers. The ecosystems with fungal-dominated soil communities may have higher C retention
than bacterial dominated soil communities. However, soil C-sequestration through plant growth, is
strongly controlled by availability of nitrogen and nutrients required for biological nitrogen
fixation.
Nitrogenous and other chemical fertilizers show positive effect on C-sequestration but carry a carbon
cost. Promotion of biological nitrogen
fixers, and nutrient solubilizers and mobilizers may help in
maintaining soil nutrient balance for higher C-sequestration. However more data need to be generated
on the response of various plant beneficial as well as pathogenic microbial communities to eCO2. We
suggest that plant associated communities and related processes to be researched in long term studies for
alteration under eCO2 so as to assess their C-sequestration potential and identify management strategies
for enhanced sequestration.
Not Available
 
Date 2020-02-25T05:01:24Z
2020-02-25T05:01:24Z
2015-06-30
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/32437
 
Language English
 
Relation Not Available;
 
Publisher Maheswari M, Desai S, Gopinath K.A, Venkateswarlu B