What question did this study set out to answer?

To establish a cultivation-independent molecular framework that combines direct rRNA sequence retrieval with whole-cell oligonucleotide probing to identify, enumerate, and characterize uncultured microorganisms in natural environments.

January 1, 1995Microbiological ReviewsOpen Access

Phylogenetic identification and in situ detection of individual microbial cells without cultivation.

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To establish a cultivation-independent molecular framework that combines direct rRNA sequence retrieval with whole-cell oligonucleotide probing to identify, enumerate, and characterize uncultured microorganisms in natural environments.
Combined direct retrieval and phylogenetic analysis of environmental rRNA sequences with whole-cell fluorescence in situ hybridization using oligonucleotide probes.
Applied a hierarchical, top-to-bottom probing strategy with increasingly specific taxonomic probes across systems ranging from endosymbionts to complex biofilms and activated sludge.
Achieved in situ phylogenetic identification, direct microscopic enumeration, and spatial distribution mapping of uncultivated microbial cells across varied environmental samples.
Demonstrated that whole-cell hybridization signal intensity correlates with cellular rRNA content, enabling the estimation of individual cell growth rates and metabolic activity.
Characterized key technical challenges—including low target rRNA concentrations, cell wall impermeability, and autofluorescence—and defined protocols to overcome them.

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Implication

Methodological review demonstrates in situ rRNA probing for identifying uncultured microbes in environmental samples, indicating improved mapping of natural microbial communities.

Cite This Study

Amann et al. (1995) studied this question.

synapsesocial.com/papers/6a0ccac3a4d785ea81625932 https://doi.org/10.1128/mmbr.59.1.143-169.1995

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Implication

Methodological review demonstrates in situ rRNA probing for identifying uncultured microbes in environmental samples, indicating improved mapping of natural microbial communities.

Phylogenetic identification and in situ detection of individual microbial cells without cultivation.

Key Points

Discussion

Implication

Cite This Study

Phylogenetic identification and in situ detection of individual microbial cells without cultivation.

Key Points

Discussion

Implication

Cite This Study

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