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Microorganisms
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Genomics of Marine and Aquatic Bacteria: A Focus on Novel...
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Genomics of Marine and Aquatic Bacteria: A Focus on Novel Taxa, Diversity and Biotechnological Potential 2.0

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Environmental Microbiology".

Deadline for manuscript submissions: 15 September 2024 | Viewed by 131

Special Issue Editor

Dr. Alexander Machado Cardoso

E-Mail Website
Guest Editor
Department of Biology, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
Interests: environmental biotechnology; environmental sciences; microbial diversity and metagenome

Special Issue Information

Dear Colleagues,

The current issue is a continuation of the Special Issue “Genomics of Marine and Aquatic Bacteria: A Focus on Novel Taxa, Diversity and Biotechnological Potential”.

Marine and aquatic bacteria represent an enormous portion of biodiversity and are a valuable bioprospecting source in the search for novel bioactive compounds, functional food ingredients, and polymers. Our knowledge regarding the bacterial world has been greatly advanced by exploring bacterial genome sequences, especially in bacterial systematics, genetic diversity, and microbial evolution. Advances in genomics promote the application of genetic information of bacteria in virtually unlimited areas. To describe new taxa, environmental microbiologists have to combine culture-dependent studies with genome sequence analyses. Research on bacteria recovered from underexplored, remote, and extreme environments, such as arctic seas, the deep sea, or underground waters and sediments, is a challenge for understanding microbial diversity, its conservation, and further biotechnological use. We firmly believe that new taxa will result in new genes, new knowledge, and new opportunities.

Dr. Alexander Machado Cardoso
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Microorganisms is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bacteria
  • diversity
  • bacterial communities
  • novel taxa
  • phylogeny
  • genome analysis
  • marine and aquatic environments

Published Papers (1 paper)

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Research

22 pages, 5201 KiB  
Article
A Novel View on the Taxonomy of Sulfate-Reducing Bacterium ‘Desulfotomaculum salinum’ and a Description of a New Species Desulfofundulus salinus sp. nov.
by Tamara N. Nazina, Tatyana P. Tourova, Denis S. Grouzdev, Salimat K. Bidzhieva and Andrey B. Poltaraus
Microorganisms 2024, 12(6), 1115; https://0-doi-org.brum.beds.ac.uk/10.3390/microorganisms12061115 - 30 May 2024
Abstract
Two thermophilic spore-forming sulfate-reducing strains, 435T and 781, were isolated from oil and gas reservoirs in Western Siberia (Russia) about 50 years ago. Both strains were found to be neutrophilic, chemoorganotrophic, anaerobic bacteria, growing at 45–70 °C (optimum, 55–60 °C) and with [...] Read more.
Two thermophilic spore-forming sulfate-reducing strains, 435T and 781, were isolated from oil and gas reservoirs in Western Siberia (Russia) about 50 years ago. Both strains were found to be neutrophilic, chemoorganotrophic, anaerobic bacteria, growing at 45–70 °C (optimum, 55–60 °C) and with 0–4.5% (w/v) NaCl (optimum, 0.5–1% NaCl). The major fatty acids were iso-C15:0, iso-C17:0, C16:0, and C18:0. In sulfate-reducing conditions, the strains utilized H2/CO2, formate, lactate, pyruvate, malate, fumarate, succinate, methanol, ethanol, propanol, butanol, butyrate, valerate, and palmitate. In 2005, based on phenotypic characteristics and a 16S rRNA gene sequence analysis, the strains were described as ‘Desulfotomaculum salinum’ sp. nov. However, this species was not validly published because the type strain was not deposited in two culture collections. In this study, a genomic analysis of strain 435T was carried out to determine its taxonomic affiliation. The genome size of strain 435T was 2.886 Mb with a 55.1% genomic G + C content. The average nucleotide identity and digital DNA–DNA hybridization values were highest between strain 435T and members of the genus Desulfofundulus, 78.7–93.3% and 25.0–52.2%, respectively; these values were below the species delineation cut-offs (<95–96% and <70%). The cumulative phenotypic and phylogenetic data indicate that two strains represent a novel species within the genus Desulfofundulus, for which the name Desulfofundulus salinus sp. nov. is proposed. The type strain is 435T (=VKM B-1492T = DSM 23196T). A genome analysis of strain 435T revealed the genes for dissimilatory sulfate reduction, autotrophic carbon fixation via the Wood–Ljungdahl pathway, hydrogen utilization, methanol and organic acids metabolism, and sporulation, which were confirmed by cultivation studies. Full article
(This article belongs to the Special Issue Genomics of Marine and Aquatic Bacteria: A Focus on Novel Taxa, Diversity and Biotechnological Potential 2.0)
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