'Species concept' in microbial taxonomy and systematics.

Saved in:

Bibliographic Details
Title:	'Species concept' in microbial taxonomy and systematics.
Authors:	Sharma, Rohit¹ rohit@nccs.res.in, Polkade, Ashish V.¹, Shouche, Yogesh S.¹
Source:	Current Science (00113891). 5/1/2015, Vol. 108 Issue 10, p1804-1814. 11p.
Subjects:	Classification of microorganisms, Microorganism phylogeny, Matrix-assisted laser desorption-ionization, Species diversity, Bacteria classification, Nucleotide sequencing, Nucleic acid hybridization, Microbial ecology
Abstract:	Species is the basic unit of identification of a large diversity of organisms. The concept of species is old and has undergone several changes depending on the kind of organism(s). Earlier concepts were formulated considering mostly macroorganisms (plants or animals). In 21st century the microbial species concept took shape which changed from morphological, ecological, biological and phylogenetic to more agreeable polyphasic species concept. Polyphasic species concept involves a combination of characters such as morphology, physiology, biochemical markers and sequencing of various regions of the DNA known as molecular markers. There are also specific criteria such as DNA-DNA hybridization for complex genera of Bacteria and Archaea, extrolite profiling for complex genera of fungi, etc. Although species concept and taxonomy of Bacteria are more systematic than fungi, taxonomy in two domains (bacteria, archaea) and fungi of eukarya domain is undergoing changes. The time is not far when genome sequencing will be considered as another criterion for delineating species. This article also discusses the role of various techniques (MALDI, FAME, etc.) in species identification. The concept of Candidatus species and species annotation for metagenomic studies is also discussed. We briefly describe the criteria used to delineate species in various microbes and the need for different species concepts based on the kind of organism. [ABSTRACT FROM AUTHOR]
	Copyright of Current Science (00113891) is the property of Indian Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Engineering Source

Description
Abstract:	Species is the basic unit of identification of a large diversity of organisms. The concept of species is old and has undergone several changes depending on the kind of organism(s). Earlier concepts were formulated considering mostly macroorganisms (plants or animals). In 21st century the microbial species concept took shape which changed from morphological, ecological, biological and phylogenetic to more agreeable polyphasic species concept. Polyphasic species concept involves a combination of characters such as morphology, physiology, biochemical markers and sequencing of various regions of the DNA known as molecular markers. There are also specific criteria such as DNA-DNA hybridization for complex genera of Bacteria and Archaea, extrolite profiling for complex genera of fungi, etc. Although species concept and taxonomy of Bacteria are more systematic than fungi, taxonomy in two domains (bacteria, archaea) and fungi of eukarya domain is undergoing changes. The time is not far when genome sequencing will be considered as another criterion for delineating species. This article also discusses the role of various techniques (MALDI, FAME, etc.) in species identification. The concept of Candidatus species and species annotation for metagenomic studies is also discussed. We briefly describe the criteria used to delineate species in various microbes and the need for different species concepts based on the kind of organism. [ABSTRACT FROM AUTHOR]
ISSN:	00113891