Abstract
Culturing uncultured microorganisms is an important aspect of microbiology. Once cultured, these microorganisms can be a source of useful antibiotics, enzymes etc. In this study, we have designed a novel culturing chip (cChip) to facilitate the growth of uncultured aquatic bacterial community by concentrating the samples. cChip was optimized for microbial growth using known bacteria in the laboratory as a pre-experiment. Then microorganisms from a freshwater lake were concentrated and inoculated, before putting the inoculated cChip in a simulated lake environment and further sub-culturing on laboratory media. High-throughput sequencing and traditional culturing were also performed for comparison. These three methods were able to detect 265 genera of microorganisms in the sample, of which 78.87% were detected by high-throughput sequencing, 30.94% by cChip, while only 6.42% were obtained by traditional culture. Moreover, all microorganisms obtained by traditional culture were also cultured using the cChip. A total of 45 new strains were isolated from the cChip, and their 16S rRNA gene sequences were 91.35% to 98.7% similar to their closest relatives according to NCBI GenBank database. We conclude that the design and simple operation of cChip can improve the culture efficiency of traditional culture by almost 5 times. To the best of our knowledge, this is the first report comparing a novel culturing method with high-throughput sequencing data and traditional culturing of the same samples.
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Data availability
Data have been submitted to the NCBI GenBank database under the accession numbers mentioned in Table 1, and the high-throughput sequencing section (lines 311–312) of this manuscript.
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Acknowledgements
The authors are thankful to Talal Jamil Qazi, Mohibullah Kakar, Muhammad Akram, Salabat Khan Wazir, Iqbal Ahmed Alvi, other friends, students of Deng’s family and Ying’s lab for providing logistic, technical, and moral support during the research work. The authors are thankful to Research Square for adding this study as a preprint under the https://doi.org/10.21203/rs.3.rs-91678/v1.
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AFL and YZ: discussed the idea and designed the study under the supervision of YD. AFL: performed all the experimental work including sampling and solved experimental hurdles in consultation with YZ, MA, and YD. AFL, and YZ: wrote the manuscript, MA helped in corrections. All the facilities for the study were provided by YD, and progress was regularly monitored.
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Lodhi, A.F., Zhang, Y., Adil, M. et al. Design and application of a novel culturing chip (cChip) for culturing the uncultured aquatic microorganisms. Arch Microbiol 205, 285 (2023). https://doi.org/10.1007/s00203-023-03613-w
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DOI: https://doi.org/10.1007/s00203-023-03613-w