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Chapter 3 : Discovering the Real Microbial World

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Abstract:

Life is an interconnected web of organisms, and the main struts—the main fibers—in this web are evolutionary relationships. Today, microbiologists are developing a biologically meaningful understanding of microorganisms, so that we can realize how really important, and diverse the microbial world is. Many earlier molecular evolutionists knew that the technical power existed in molecular sequencing to determine distant phylogenetic relationships. Some understood that with the right molecules—for example, transfer RNAs—the full breadth of phylogeny could be spanned. Yet from their actions, it appeared that none of them appreciated the importance of determining a universal phylogenetic tree, what powerful evolutionary knowledge would emerge there from. The old prokaryote-eukaryote dichotomy was short on understanding and long on dividing biology into two camps, which more or less went their separate ways. The emphasis was on the ways in which prokaryotes and eukaryotes differ, not on why they differ and what sort of common ancestor they share. The archaea are central to a real revolution that is still occurring in microbiology. They epitomize the importance of phylogeny and the power of molecular biology to reveal evolutionary history.

Citation: Woese C. 2000. Discovering the Real Microbial World, p 15-25. In Atlas R (ed), Many Faces, Many Microbes. ASM Press, Washington, DC. doi: 10.1128/9781555818128.ch3

Key Concept Ranking

Microbial Ecology
0.7560152
Bacteria and Archaea
0.71582437
Ribosomal RNA
0.5307412
RNA Polymerase
0.52
0.7560152
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Citation: Woese C. 2000. Discovering the Real Microbial World, p 15-25. In Atlas R (ed), Many Faces, Many Microbes. ASM Press, Washington, DC. doi: 10.1128/9781555818128.ch3
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References

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1. Woese, C. R. 1998. The universal ancestor. Proc. Natl. Acad, Sci. USA 95:68546859.
2. Woese, C. R. 1987. Bacterial evolution. Microbiol. Rev. 51:221271.
3. Noller, H. F.,, and C. R. Woese. 1981. Secondary structure of 16S ribosomal RNA. Science 212:403411.
4. Fox, G. E.,, E. Stackebrandt,, R. B. Hespell,, J. Gibson,, J. Maniloff,, T. A. Dyer,, R. S. Wolfe,, W. E. Balch,, R. S. Tanner,, L. J. Magrum,, L. B. Zablen,, R. Blakemore,, R. Gupta,, L. Bonen,, B. J. Lewis,, D. A. Stahl,, K. R. Luehrsen,, K. N. Chen,, and C. R. Woese. 1980. The phylogeny of prokaryotes. Science 209:457463.
5. Woese, C. R.,, and G. E. Fox. 1977. Phylogenetic structure of the prokaryotic domain: The primary kingdoms. Proc. Natl. Acad. Sci. USA 74:50885090.
6. Woese, C. R. 1970. Molecular mechanics of translation: A reciprocating ratchet mechanism. Nature 226:817820.
7. Woese, C. R.,, D. H. Dugre,, W. C. Saxinger,, and S. A. Dugre. 1966. The molecular basis for the genetic code. Proc. Natl. Acad. Sci. USA 55:966974.

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