alexa The molecular phylogeny and systematics of the actinomycetes.
Microbiology

Microbiology

Fermentation Technology

Author(s): Embley TM, Stackebrandt E

Abstract Share this page

Abstract Sequences of 16S ribosomal RNA have provided actinomycetologists with a phylogenetic tree that allows the investigation of the evolution of actinomycetes and also provides a basis for classification. The origin of actinomycetes and, except for bifidobacteria, the order by which the main sublines evolved, cannot yet be determined with certainty. However, calibration of rRNA sequence divergence with palaeochemical data, and previously published substitution rates of endosymbiotic bacteria, suggest that the main radiation occurred less than 1 billion years ago. Within this radiation, several phylogenetically homogeneous, but sometimes phenotypically heterogeneous, clades appear to have diverged over a short evolutionary period. The resolution of the 16S rRNA molecule appears to be insufficient to clearly determine the branching patterns between clades in this area of the phylogenetic tree. The distribution of some morphological and chemotaxonomic traits such as types of peptidoglycan, menaquinone, phospholipids, cell wall sugars, and fatty acids facilitate the phenotypic delineation of genera within each clade. At higher taxonomic levels, e.g. at the family level, phenotypic similarities are unpredictable and tend to be less conserved. With the exception of mycolic acids, most traits are polyphyletic--hence they are unreliable indicators per se of phylogenetic relationships. Nevertheless, combinations of phenotypic properties are invaluable for predicting whether a new organism is likely to be a member of an established or a novel taxon. Current knowledge about the phylogenetic structure of the actinomycetes provides not only a sound basis for future taxonomic work but also a framework for the rational exploration of their ecology and biotechnological potential. This article was published in Annu Rev Microbiol and referenced in Fermentation Technology

Relevant Expert PPTs

Relevant Speaker PPTs

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords