Abstract
The past decade has witnessed a revolution in our understanding of the evolutionary history of bacteria and the relationships among species. The rapid increase in molecular sequence data, and in particular in sequences of the 16S ribosomal RNA gene, has given us for the first time a reliable framework for the classification of bacteria. Using this, we have discovered that many organisms once thought to be closely related are in fact rather distant, while some unexpected close relationships have also been found. As a consequence of this new knowledge, and of the isolation and description of genuinely new organisms, there has been a flood of new names in recent years, and this is likely to continue. Although name changes can seem confusing, the new taxonomy has important implications for all studies of bacterial biology, as comparisons between one species and another cannot be interpreted except in the light of evolution. It can be very misleading to assume that organisms that share an important metabolic trait are necessarily closely related. On the other hand, phylogenetic information can help to make important connections, such as the relationship between pathogenesis-related genes in animal pathogens and corresponding genes in plant pathogens. This chapter outlines the causes of the rapid progress in phylogeny-based taxonomy, and presents our current view of the phylogeny of major groups of plant-associated bacteria, including in particular the rhizobia, agrobacteria and pseudomonads.
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Peter, J., Young, W. (1994). All Those New Names: an Overview of the Molecular Phylogeny of Plant-associated Bacteria. In: Daniels, M.J., Downie, J.A., Osbourn, A.E. (eds) Advances in Molecular Genetics of Plant-Microbe Interactions. Current Plant Science and Biotechnology in Agriculture, vol 21. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0177-6_11
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DOI: https://doi.org/10.1007/978-94-011-0177-6_11
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