Cultivation Strategies for Uncultured Microbial Communities

Despite the vast diversity revealed by sequencing, the majority of microbial taxa remain recalcitrant to laboratory culture, limiting our understanding of their physiology, ecological roles and biotechnological potential. Cultivation strategies have evolved from simple nutrient-rich media towards approaches that mimic native habitats, employ low-nutrient or specialised formulations and exploit high-throughput screening. Key developments include in situ devices that preserve environmental gradients, co-culture schemes that harness microbial interactions, resuscitation protocols to revive dormant cells and multi-omics-guided design of culture media. Advances in miniaturisation, automation and data integration now enable systematic exploration of culture conditions on an unprecedented scale. Such methods have not only expanded the catalogue of novel taxa but also revealed metabolic functions underpinning biogeochemical cycles, natural product biosynthesis and pollutant degradation. By bridging the gap between sequence-based discovery and physiological characterisation, these cultivation strategies promise to transform microbiology, with implications for health, agriculture and environmental management.

Research from Nature Portfolio

Recent studies have mapped the repertoire of existing culture media into a unified database and used machine-learning algorithms to predict new organism–media pairings, achieving high success rates in vitro and facilitating targeted cultivation based on 16S rDNA sequences. This resource guides researchers in selecting optimal formulations for previously uncultivated strains. In parallel, a novel diffusion bioreactor has been developed that encloses soil samples within semi-permeable membranes, allowing exchange of natural nutrients and signalling molecules while isolating developing microcolonies. Deployment of this device to forest soils yielded dozens of bacterial strains never before grown, demonstrating the power of habitat-mimetic cultivation under varying incubation periods and substrate concentrations.

Cultivation Strategies for Uncultured Microbial Communities publication trend

The graph below shows the total number of articles in cultivation strategies for uncultured microbial communities across all publications each year (not limited to Nature Index journals).

Technical terms

Culturomics: High-throughput cultivation technique employing diverse media and conditions to isolate novel microorganisms.

Diffusion bioreactor: In situ device with semi-permeable membranes that maintains native chemical gradients to support microbial growth.

Multi-omics: Integrated use of genomic, transcriptomic and metabolomic data to tailor culture media and conditions.

Resuscitation: Process of reactivating dormant or viable but non-culturable cells by adjusting environmental or nutritional factors.

References

1. High proportions of bacteria and archaea across most biomes remain uncultured. The ISME Journal: Multidisciplinary Journal of Microbial Ecology (2019).
2. Harnessing the landscape of microbial culture media to predict new organism–media pairings. Nature Communications (2015).
3. Development of a novel cultivation technique for uncultured soil bacteria. Scientific Reports (2019).
4. Cultivation strategies for prokaryotes from extreme environments. iMeta (2023).
5. Application of culturomics in fungal isolation from mangrove sediments. Microbiome (2023).