W POSZUKIWANIU
KONCEPCJI GATUNKU BAKTERYJNEGO
Wanda Małek1, Sylwia Wdowiak-Wróbel1, Michał
Kalita1
Izabela Święcicka2, Bożena Studzińska1
1 Zakład Mikrobiologii Ogólnej UMCS, ul. Akademicka 19, 20-033 Lublin,
tel. (081) 537 59 76, e-mail: wanda@biotop.umcs.lublin.pl
2Zakład Mikrobiologii, Instytut Biologii UB, ul. Świerkowa 20b, 15- 950 Białystok
tel. (085) 745 73 32, e-mail: izabelas@uwb.edu.pl
Wpłynęło w maju 2005 r.
l. Wprowadzenie. 2. Krótka historia taksonomii i koncepcji gatunku bakteryjnego. 3. Współczesne koncepcje gatunku eukariotycznego i ich relacje do koncepcji gatunku bakteryjnego. 4. Wymiana materiału genetycznego u bakterii i ich różnicowanie. 5. Podsumowanie
In a search of a bacterial species concept
Abstract: The species concept is still controversial issue for micro- as well as macrobiologists. Prokaryotic species definition has changed many times. It has happened under an influence of new information on bacterial cell deriving from analysis of biochemical properties, chemical composition and more recently, on the basis of data from analysis of genomic DNA by determination of G+C composition (mol%). overall DNA-DNA sequence similarity using hybridization and house-keeping gene sequencing. The prokaryotic species concept. currently in use, is circumscribed by three parameters: phenotype, DNA-DNA similarity, and monophyletic nature of bacteria. It say that bacterial species is a monophyletic, genomically coherent cluster of individual organisms exhibiting a high degree of phenotypic resemblance that is diagnosable by discriminative phenotypic features. This phylo-phenetic species concept is generally acceptable by microbial taxonomists for its usefulness, universality to all bacteria, although, it does not correspond to any concepts designed for eukaryotes.
1. Introduction. 2. Short history of bacterial taxonomy and species concept. 3. Current eukaryotic species concepts and their relations to a bacterial species concepts. 4. Exchange of genetic material in bacteria and their differentiation. 5. Summary
Słowa kluczowe: gatunek bakteryjny, taksonomia
Key words:
bacterial
species
|
