Single-cell stable isotope probing in microbial ecology.

Area of Science:

• Microbiology
• Environmental Science
• Systems Biology

Background:

• Microbiomes are diverse communities with crucial roles in environmental and health processes.
• Understanding individual microbial activities within these complex systems is challenging.
• Meta-omics data provide hypotheses but lack single-cell functional resolution.

Purpose of the Study:

• To review the applications and potential of single-cell stable isotope probing (SC-SIP) techniques.
• To demonstrate how SC-SIP elucidates specific microbial activities in complex communities.
• To highlight SC-SIP's utility in testing functional hypotheses derived from other 'omics' data.

Main Methods:

• Single-cell stable isotope probing (SC-SIP) encompasses techniques using Raman microspectroscopy or NanoSIMS.
• These methods allow spatially resolved tracking of isotope tracers within cells and metabolites.
• SC-SIP enables direct observation of metabolic activity at the single-cell level.

Main Results:

• SC-SIP provides insights into the functional heterogeneity of microbial communities.
• The techniques enable the identification of active cells and their metabolic pathways.
• Applications reviewed demonstrate SC-SIP's power in diverse microbiological contexts.

Conclusions:

• SC-SIP is a powerful approach for dissecting microbial community functions at the single-cell level.
• It bridges the gap between 'omics' data and direct functional measurements.
• SC-SIP holds significant potential for future microbiome research across various disciplines.