NDLI: Uneven Distribution of Halobacillus trueperi Species in Arid Natural Saline Systems of Southern Tunisian Sahara

Content Provider	Springer Nature Link
Author	Guesmi, Amel Ettoumi, Besma Hidri, Darine Essanaa, Jihene Cherif, Hanene Mapelli, Francesca Marasco, Ramona Rolli, Eleora Boudabous, Abdellatif Cherif, Ameur
Copyright Year	2013
Abstract	The genetic diversity of a collection of 336 spore-forming isolates recovered from five salt-saturated brines and soils (Chott and Sebkhas) mainly located in the hyper-arid regions of the southern Tunisian Sahara has been assessed. Requirements and abilities for growth at a wide range of salinities\ showed that 44.3 % of the isolates were extremely halotolerant, 23 % were moderate halotolerant, and 32.7 % were strict halophiles, indicating that they are adapted to thrive in these saline ecosystems. A wide genetic diversity was documented based on 16S–23S rRNA internal transcribed spacer fingerprinting profiles (ITS) and 16S rRNA gene sequences that clustered the strains into seven genera: Bacillus, Gracilibacillus, Halobacillus, Oceanobacillus, Paenibacillus, Pontibacillus, and Virgibacillus. Halobacillus trueperi was the most encountered species in all the sites and presented a large intraspecific diversity with a multiplicity of ITS types. The most frequent ITS type included 42 isolates that were chosen for assessing of the intraspecific diversity by BOX-PCR fingerprinting. A high intraspecific microdiversity was documented by 14 BOX-PCR genotypes whose distribution correlated with the strain geographic origin. Interestingly, H. trueperi isolates presented an uneven geographic distribution among sites with the highest frequency of isolation from the coastal sites, suggesting a marine rather than terrestrial origin of the strains. The high frequency and diversity of H. trueperi suggest that it is a major ecosystem-adapted microbial component of the Tunisian Sahara harsh saline systems of marine origin.
Starting Page	831
Ending Page	839
Page Count	9
File Format	PDF
ISSN	00953628
Journal	Microbial Ecology
Volume Number	66
Issue Number	4
e-ISSN	1432184X
Language	English
Publisher	Springer US
Publisher Date	2013-08-16
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Microbiology Ecology Microbial Ecology Geoecology/Natural Processes Nature Conservation Water Quality/Water Pollution
Content Type	Text
Resource Type	Article
Subject	Soil Science Ecology Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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