Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.4
4.5
Journals
Microorganisms
Special Issues
Algal Host-Microbe Interactions
share announcement

Algal Host-Microbe Interactions

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

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 16709

Special Issue Editors

Dr. Simon Dittami

E-Mail Website
Guest Editor
Integrative Biology of Marine Models (LBI2M), CNRS, Sorbonne Université, 29680 Roscoff, France
Interests: host-microbe interactions; metabolic networks; abiotic stress; acclimation; genomics
Dr. Catherine Leblanc

E-Mail Website
Guest Editor
Integrative Biology of Marine Models, LBI2M (Sorbonne Université/CNRS), Station Biologique de Roscoff (SBR), 29680 Roscoff, France
Interests: algal bacterial interactions; iodine metabolism
Dr. Aschwin Engelen

E-Mail Website
Guest Editor
Centro de Ciências do Mar (CCMAR), CIMAR, University of Algarve, Faro, Portugal
Interests: ecology and evolution of marine holobionts
Prof. Dr. Suhelen Egan

E-Mail Website
Guest Editor
Centre for Marine Bio-Innovation and School of Biological Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia
Interests: microbiology; microbial Ecology; environmental biotechnology; biological sciences
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Host–microbe interactions play crucial roles in marine ecosystems, but we know little of the mechanisms that govern them, their evolution, and their ecological and economic impacts. This Special Issue is dedicated to studies in host–microbe interactions of macro- and microalgae, from mutualistic to parasitic interactions. Contributions can include diversity assessments of the symbiome, functional studies on interactions, conceptual advances, and commercial aspects such as the cultivation of algae and alga-derived products. Model systems include viruses, bacteria, archaea, fungi, oomycetes, and endo- and epiphytic algae.

Dr. Simon Dittami
Dr. Catherine Leblanc
Dr. Aschwin Engelen
Prof. Dr. Suhelen Egan
Guest Editors

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

  • algae
  • mutualism
  • commensalism
  • parasitism
  • holobiont
  • probiotics

Published Papers (6 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Other

18 pages, 12733 KiB  
Article
Genome Evolution of Filamentous Cyanobacterium Nostoc Species: From Facultative Symbiosis to Free Living
by Da Huo, Hua Li, Fangfang Cai, Xiaoyu Guo, Zhiyi Qiao, Weibo Wang, Gongliang Yu and Renhui Li
Microorganisms 2021, 9(10), 2015; https://doi.org/10.3390/microorganisms9102015 - 23 Sep 2021
Cited by 4 | Viewed by 3061
Abstract
In contrast to obligate bacteria, facultative symbiotic bacteria are mainly characterized by genome enlargement. However, the underlying relationship of this feature with adaptations to various habitats remains unclear. In this study, we used the global genome data of Nostoc strains, including 10 novel [...] Read more.
In contrast to obligate bacteria, facultative symbiotic bacteria are mainly characterized by genome enlargement. However, the underlying relationship of this feature with adaptations to various habitats remains unclear. In this study, we used the global genome data of Nostoc strains, including 10 novel genomes sequenced in this study and 26 genomes available from public databases, and analyzed their evolutionary history. The evolutionary boundary of the real clade of Nostoc species was identified and was found to be consistent with the results of polyphasic taxonomy. The initial ancestral species of Nostoc was demonstrated to be consistent with a facultative symbiotic population. Further analyses revealed that Nostoc strains tended to shift from facultative symbiosis to a free-living one, along with an increase in genome sizes during the dispersal of each exterior branch. Intracellular symbiosis was proved to be essentially related to Nostoc evolution, and the adaptation of its members to free-living environments was coupled with a large preference for gene acquisition involved in gene repair and recombination. These findings provided unique evidence of genomic mechanisms by which homologous microbes adapt to distinct life manners and external environments. Full article
(This article belongs to the Special Issue Algal Host-Microbe Interactions)
►▼ Show Figures

Figure 1

16 pages, 2476 KiB  
Article
Isolation and Characterization of Euglena gracilis-Associated Bacteria, Enterobacter sp. CA3 and Emticicia sp. CN5, Capable of Promoting the Growth and Paramylon Production of E. gracilis under Mixotrophic Cultivation
by Rubiyatno, Kazuhiro Mori, Daisuke Inoue, Sunah Kim, Jaecheul Yu, Taeho Lee, Michihiko Ike and Tadashi Toyama
Microorganisms 2021, 9(7), 1496; https://doi.org/10.3390/microorganisms9071496 - 13 Jul 2021
Cited by 4 | Viewed by 2799
Abstract
Euglena gracilis produces paramylon, which is a feedstock for high-value functional foods and nutritional supplements. The enhancement of paramylon productivity is a critical challenge. Microalgae growth-promoting bacteria (MGPB) can improve microalgal productivity; however, the MGPB for E. gracilis remain unclear. This study isolated [...] Read more.
Euglena gracilis produces paramylon, which is a feedstock for high-value functional foods and nutritional supplements. The enhancement of paramylon productivity is a critical challenge. Microalgae growth-promoting bacteria (MGPB) can improve microalgal productivity; however, the MGPB for E. gracilis remain unclear. This study isolated bacteria capable of enhancing E. gracilis growth and paramylon production under mixotrophic conditions. Enterobacter sp. CA3 and Emticicia sp. CN5 were isolated from E. gracilis grown with sewage-effluent bacteria under mixotrophic conditions at pH 4.5 or 7.5, respectively. In a 7-day E. gracilis mixotrophic culture with glucose, CA3 increased E. gracilis biomass and paramylon production 1.8-fold and 3.5-fold, respectively (at pH 4.5), or 1.9-fold and 3.5-fold, respectively (at pH 7.5). CN5 increased E. gracilis biomass and paramylon production 2.0-fold and 4.1-fold, respectively (at pH 7.5). However, the strains did not show such effects on E. gracilis under autotrophic conditions without glucose. The results suggest that CA3 and CN5 promoted both E. gracilis growth and paramylon production under mixotrophic conditions with glucose at pH 4.5 and 7.5 (CA3) or pH 7.5 (CN5). This study also provides an isolation method for E. gracilis MGPB that enables the construction of an effective E. gracilis–MGPB-association system for increasing the paramylon yield of E. gracilis. Full article
(This article belongs to the Special Issue Algal Host-Microbe Interactions)
►▼ Show Figures

Figure 1

14 pages, 2570 KiB  
Article
The Microbiome Associated with the Reef Builder Neogoniolithon sp. in the Eastern Mediterranean
by Shany Gefen-Treves, Alexander Bartholomäus, Fabian Horn, Adam Boleslaw Zaborowski, Dan Tchernov, Dirk Wagner, Aharon Oren and Aaron Kaplan
Microorganisms 2021, 9(7), 1374; https://doi.org/10.3390/microorganisms9071374 - 24 Jun 2021
Cited by 3 | Viewed by 2079
Abstract
The development of coastal vermetid reefs and rocky shores depends on the activity of several reef builders, including red crustose coralline algae (CCA) such as Neogoniolithon sp. To initiate studies on the interaction between Neogoniolithon sp. and its associated bacteria, and their impact [...] Read more.
The development of coastal vermetid reefs and rocky shores depends on the activity of several reef builders, including red crustose coralline algae (CCA) such as Neogoniolithon sp. To initiate studies on the interaction between Neogoniolithon sp. and its associated bacteria, and their impact on the algae physiological performance, we characterized the bacterial community by 16S rRNA gene sequencing. These were extracted from the algal tissue and adjacent waters along two sampling campaigns (during winter and spring), in three study regions along a reef in the east Mediterranean Israeli coast and from laboratory-grown algae. The analysis revealed that aquaria and field communities differ substantially, suggesting that future research on Neogoniolithon sp. interaction with its microbiome must rest on aquaria that closely simulate coastal conditions. Some prokaryote classes found associated with the alga tissue were hardly detected or absent from surrounding water. Further, bacterial populations differed between sampling campaigns. One example is the presence of anaerobic bacteria and archaea families in one of the campaigns, correlating with the weaker turbulence in the spring season, probably leading to the development of local anoxic conditions. A better understanding of reef-building activity of CCA and their associated bacteria is necessary for assessment of their resilience to climate change and may support coastal preservation efforts. Full article
(This article belongs to the Special Issue Algal Host-Microbe Interactions)
►▼ Show Figures

Figure 1

11 pages, 2416 KiB  
Communication
The Microbiome of the Reef Macroalga Sargassum ilicifolium in Singapore
by Ren Min Oh, Elena Bollati, Prasha Maithani, Danwei Huang and Benjamin J. Wainwright
Microorganisms 2021, 9(5), 898; https://doi.org/10.3390/microorganisms9050898 - 22 Apr 2021
Cited by 11 | Viewed by 2859
Abstract
The large canopy-forming macroalga, Sargassum ilicifolium, provides shelter and food for numerous coral reef species, but it can also be detrimental at high abundances where it outcompetes other benthic organisms for light and space. Here, we investigate the microbial communities associated with [...] Read more.
The large canopy-forming macroalga, Sargassum ilicifolium, provides shelter and food for numerous coral reef species, but it can also be detrimental at high abundances where it outcompetes other benthic organisms for light and space. Here, we investigate the microbial communities associated with S. ilicifolium in Singapore, where it is an abundant and important member of coral reef communities. We collected eight complete S. ilicifolium thalli from eight island locations along an approximate 14 km east-to-west transect. Each thallus was dissected into three separate parts: holdfast, vesicles, and leaves. We then characterized the bacterial communities associated with each part via polymerase chain reaction (PCR) amplification of the 16S rRNA gene V4 region. We then inferred predicted metagenome functions using METAGENassist. Despite the comparatively short distances between sample sites, we show significant differences in microbial community composition, with communities further differentiated by part sampled. Holdfast, vesicles and leaves all harbor distinct microbial communities. Functional predictions reveal some separation between holdfast and leaf communities, with higher representation of sulphur cycling taxa in the holdfast and higher representation of nitrogen cycling taxa in the leaves. This study provides valuable baseline data that can be used to monitor microbial change, and helps lay the foundation upon which we can begin to understand the complexities of reef-associated microbial communities and the roles they play in the functioning and diversity of marine ecosystems. Full article
(This article belongs to the Special Issue Algal Host-Microbe Interactions)
►▼ Show Figures

Figure 1

11 pages, 546 KiB  
Article
Chemically Mediated Microbial “Gardening” Capacity of a Seaweed Holobiont Is Dynamic
by Mahasweta Saha, Shawn Dove and Florian Weinberger
Microorganisms 2020, 8(12), 1893; https://doi.org/10.3390/microorganisms8121893 - 30 Nov 2020
Cited by 6 | Viewed by 2669
Abstract
Terrestrial plants are known to “garden” the microbiota of their rhizosphere via released metabolites (that can attract beneficial microbes and deter pathogenic microbes). Such a “gardening” capacity is also known to be dynamic in plants. Although microbial “gardening” has been recently demonstrated for [...] Read more.
Terrestrial plants are known to “garden” the microbiota of their rhizosphere via released metabolites (that can attract beneficial microbes and deter pathogenic microbes). Such a “gardening” capacity is also known to be dynamic in plants. Although microbial “gardening” has been recently demonstrated for seaweeds, we do not know whether this capacity is a dynamic property in any aquatic flora like in terrestrial plants. Here, we tested the dynamic microbial “gardening” capacity of seaweeds using the model invasive red seaweed Agarophyton vermiculophyllum. Following an initial extraction of surface-associated metabolites (immediately after field collection), we conducted a long-term mesocosm experiment for 5 months to test the effect of two different salinities (low = 8.5 and medium = 16.5) on the microbial “gardening” capacity of the alga over time. We tested “gardening” capacity of A. vermiculophyllum originating from two different salinity levels (after 5 months treatments) in settlement assays against three disease causing pathogenic bacteria and seven protective bacteria. We also compared the capacity of the alga with field-collected samples. Abiotic factors like low salinity significantly increased the capacity of the alga to deter colonization by pathogenic bacteria while medium salinity significantly decreased the capacity of the alga over time when compared to field-collected samples. However, capacity to attract beneficial bacteria significantly decreased at both tested salinity levels when compared to field-collected samples. Dynamic microbial “gardening” capacity of a seaweed to attract beneficial bacteria and deter pathogenic bacteria is demonstrated for the first time. Such a dynamic capacity as found in the current study could also be applicable to other aquatic host–microbe interactions. Our results may provide an attractive direction of research towards manipulation of salinity and other abiotic factors leading to better defended A. vermiculophyllum towards pathogenic bacteria thereby enhancing sustained production of healthy A. vermiculophyllum in farms. Full article
(This article belongs to the Special Issue Algal Host-Microbe Interactions)
►▼ Show Figures

Figure 1

Other

Jump to: Research

8 pages, 3090 KiB  
Technical Note
Easy Removal of Epiphytic Bacteria on Ulva (Ulvophyceae, Chlorophyta) by Vortex with Silica Sands
by Xiaojie Liu, Jin Zhao and Peng Jiang
Microorganisms 2022, 10(2), 476; https://doi.org/10.3390/microorganisms10020476 - 21 Feb 2022
Cited by 5 | Viewed by 2057
Abstract
Macroalgae-associated bacteria play an important role in their algal hosts’ biological processes. They are localized on surfaces of the host thalli, as well as between and even within algal cells. To examine the differences in community structures and functions between epi- and endo- [...] Read more.
Macroalgae-associated bacteria play an important role in their algal hosts’ biological processes. They are localized on surfaces of the host thalli, as well as between and even within algal cells. To examine the differences in community structures and functions between epi- and endo- bacteria, an effective approach for maximizing epiphyte removal from delicate seaweeds while retaining endophyte fidelity must be developed. In this study, a variety of surface sterilization methods for Ulva prolifera were compared, including mechanical, chemical, and enzymatical treatments. According to the results of scanning electron microscope (SEM) and denaturing gradient gel electrophoresis (DGGE) analysis, almost complete removal of epiphytic bacteria on Ulva was obtained simply by co-vortex of seaweeds with silica sands, causing minimal disturbance to endosymbionts when compared to previous published methods. In addition, the adaptability was also confirmed in additional U. prolifera strains and Ulva species with blade-like or narrow tubular thallus shapes. This easy mechanical method would enable the analysis of community composition and host specificity for Ulva-associated epi- and endo-bacteria separately. Full article
(This article belongs to the Special Issue Algal Host-Microbe Interactions)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-6
Back to TopTop