Special Issue "Diversity of Sponge Symbiotic Bacteria"

A special issue of Diversity (ISSN 1424-2818).

Deadline for manuscript submissions: closed (31 January 2017)

Special Issue Editor

Guest Editor
Dr. Ipek Kurtboke

Senior Lecturer in Environmental Microbiology, School of Science, Education and Engineering, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia
Website | E-Mail
Phone: +61 7 5430 2819
Fax: +61 (07) 5430 2881
Interests: microbial diversity; microbial systematics; ecophysiology of microorganisms; functional diversity of microorganisms; microbial ecosystems

Special Issue Information

Dear Colleagues,

The diverse range of marine bioactive compounds, especially those from sponge-symbiotic bacteria, has been utilized for variety of industrial and environmental applications. However, to maximize the stream of bioactive compounds from sponge-symbiotic bacteria, sound understanding on the taxonomical and functional diversity of these symbionts has to be increased. Correlating such understanding with the rationale of symbiont-aided host bioactive metabolite production can then improve prospects of generating drug leads from sponge sources. The composition of host-associated microflora is naturally influenced by environmental factors present at the geographical location; however, thus far, in-depth information on the environmental conditions and stress factors surrounding the host, which define this specific interaction, has been limited. To provide reliable information on the true symbiotic associations, many factors, such as the current directions, continental overflows, presence or absence of pollutants, as well as the characteristics of the sediments or reefs at the sponge sampling sites, have to be known. All these factors can define the response of host sponges to such surrounding factors and their selective acquisition of the microflora during the filter feeding activity. In the absence of such knowledge determination of the existence of the true symbiotic associations between the host and the microorganisms render difficult. This Special Issue is designed to generate such information, to be able to improve understanding on the existence of true symbiotic relationships between the host and symbiotic bacteria, which in turn will aid towards utilization of such bacteria for biodiscovery and biotechnology.

Dr. Ipek Kurtboke
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 papers will be 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. Diversity is an international peer-reviewed open access quarterly 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 850 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

  • Marine microbial diversity
  • Eco-functional diversity of marine symbiotic bacteria
  • Marine symbiotic microbial metabolic diversity
  • Marine microbial ecosystems
  • Marine microbial systematics
  • Marine ecosystem mining for bioactive symbiotic bacteria

Published Papers

This special issue is now open for submission, see below for planned papers.

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Type of the paper: Short communication
Tentative title: Comparison of bioactivity, associated microorganisms and functional genes among three species of Dysidea (Porifera: Demospongiae) living in an upwelling area in the South Atlantic Ocean
Authors: Daniela Batista1*; Rafaela Costa1; Ana Polycarpa Carvalho1; Willian Romão Batista1; Cintia P. J. Rua2; Luise de Oliveira2; Luciana Leomil2; Fabiano Thompson2; Ricardo Coutinho1; Sergey Dobretsov3,4**
Affiliations: 1Instituto de Estudos do Mar Almirante Paulo Moreira, Rua Kioto no 253, Praia dos Anjos, Arraial do Cabo, RJ, Brazil 2Instituto de Genética, Universidade Federal do Rio de Janeiro, Ilha do Fundão s/n, Rio de Janeiro, RJ, Brazil 3Marine Science and Fisheries Department, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoud 34. PO Box 123, Sultanate of Oman, 4Center of Excellence in Marine Biotechnology, Sultan Qaboos University, Al-Khoud 34. PO Box 123, Sultanate of Oman.
Abstract: The present study investigated if three species of Dysidea genus living under the same environmental conditions have similar bioactivity (QS inhibitory, antibacterial and antifouling activity), composition of chemical compounds and microbial communities. The sponge species Dysidea etheria, D. janiae and D. janiae were collected in the Southwestern Atlantic (42º00'W22º44'S). Reduction of QS-dependent violacein production of C. violaceum CV017 was similar between MeOH: water extracts of D. etheria and D. janiae (70% for each one), while D. robusta had lower QS inhibitory activity (30%). For P.aeruginosa elastase activity, extracts of D. etheria were the more inhibitory (reducing 50% of QS), while other species inhibited less than 30%. Cluster analyses showed that extracts of species Dysidea had lowest similarity among chemical composition (less than 20%). Comparison of microbial communities of sponges indicated that sequences belonging to Bacteria were the most abundant, in which different species clearly had distinct bacterial communities. This study showed that the sponge species belonging to the same genus and living in same environmental conditions can have different bioactivity. Additionally, natural products from marine sponges have promising QS activities and may potentially be used in the future antifouling applications.

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