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          Institute: MPI für marine Mikrobiologie     Collection: Arbeitsgruppe Mikrosensorik     Display Documents



ID: 13846.0, MPI für marine Mikrobiologie / Arbeitsgruppe Mikrosensorik
Polyphasic characterization of benthic, moderately halophilic, moderately thermophilic cyanobacteria with very thin trichomes and the proposal of Halomicronema excentricum gen. nov., sp nov.
Authors:Abed, R. M. M.; Garcia-Pichel, F.; Hernández-Mariné, M.
Language:English
Date of Publication (YYYY-MM-DD):2002-05
Title of Journal:Archives of Microbiology
Journal Abbrev.:Arch. Microbiol.
Volume:177
Issue / Number:5
Start Page:361
End Page:370
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:A new genus of moderately halophilic, moderately halotolerant and moderately thermophilic cyanobacteria with very thin trichomes is described. The four strains included in this genus were isolated from benthic microbial mats in a man-made hypersaline pond. Trichomes were around 1 mum thick, with small constrictions at the cross-walls and diffluent colorless sheaths. Thylakoids were parallel to the cell wall, but thylakoids and nucleoid were often excentrically arranged within the cytoplasm with respect to the main trichome axis. Strains grew at between 3.2 and 12-15% (w/v) salinity with optima between 3.2 and 12%. They showed lower temperature limits around 20degreesC and upper limits between 45 and 50degreesC, with optima between 28 and 45-50degreesC. Carotenoid and mycosporine amino-acid complements were identical among strains. Phylogenetic analyses based on 16S rRNA gene sequence showed that all strains were closely related (99% or higher similarity) and distantly related to other cyanobacteria (91% or lower similarity). We propose the new genus and species Halomwicronema excentricum for these strains. The type strain is TFEP1.
Free Keywords:microbial mats; hypersaline environments; Phormidium; Leptolyngbya; polyphasic taxonomy; halotolerance; 16S rRNA; phylogeny; Halomicronema; carotenoids; thermotolerance
Comment of the Author/Creator:Date: 2002, MAY
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für marine Mikrobiologie
External Affiliations:Arizona State Univ, Dept Microbiol, POB 872701, Tempe, AZ 85287; USA; Arizona State Univ, Dept Microbiol, Tempe, AZ 85287 USA; Max Planck Inst Marine Microbiol, D-28359 Bremen, Germany; EPRI, Gaza, Gaza Strip, Israel; Univ Barcelona, Fac Farm, Unitat Bot, E-08028 Barcelona, Spain
Identifiers:ISI:000175599400001 [ID No:1]
ISSN:0302-8933 [ID No:2]
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