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Girão M, Alexandrino DAM, Cao W, Costa I, Jia Z, Carvalho MF. Unveiling the culturable and non-culturable actinobacterial diversity in two macroalgae species from the northern Portuguese coast. Environ Microbiol 2024; 26:e16620. [PMID: 38627038 DOI: 10.1111/1462-2920.16620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 03/16/2024] [Indexed: 04/19/2024]
Abstract
Actinomycetota, associated with macroalgae, remains one of the least explored marine niches. The secondary metabolism of Actinomycetota, the primary microbial source of compounds relevant to biotechnology, continues to drive research into the distribution, dynamics, and metabolome of these microorganisms. In this study, we employed a combination of traditional cultivation and metagenomic analysis to investigate the diversity of Actinomycetota in two native macroalgae species from the Portuguese coast. We obtained and taxonomically identified a collection of 380 strains, which were distributed across 12 orders, 15 families, and 25 genera affiliated with the Actinomycetia class, with Streptomyces making up approximately 60% of the composition. Metagenomic results revealed the presence of Actinomycetota in both Chondrus crispus and Codium tomentosum datasets, with relative abundances of 11% and 2%, respectively. This approach identified 12 orders, 16 families, and 17 genera affiliated with Actinomycetota, with minimal overlap with the cultivation results. Acidimicrobiales emerged as the dominant actinobacterial order in both macroalgae, although no strain affiliated with this taxonomic group was successfully isolated. Our findings suggest that macroalgae represent a hotspot for Actinomycetota. The synergistic use of both culture-dependent and independent approaches proved beneficial, enabling the identification and recovery of not only abundant but also rare taxonomic members.
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Affiliation(s)
- Mariana Girão
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- ICBAS-School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
| | - Diogo A M Alexandrino
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- Department of Environmental Health, School of Health, Porto, Portugal
| | - Weiwei Cao
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Isabel Costa
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Zhongjun Jia
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Maria F Carvalho
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- ICBAS-School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
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2
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Adouane E, Mercier C, Mamelle J, Willocquet E, Intertaglia L, Burgunter-Delamare B, Leblanc C, Rousvoal S, Lami R, Prado S. Importance of quorum sensing crosstalk in the brown alga Saccharina latissima epimicrobiome. iScience 2024; 27:109176. [PMID: 38433891 PMCID: PMC10906538 DOI: 10.1016/j.isci.2024.109176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/07/2023] [Accepted: 02/06/2024] [Indexed: 03/05/2024] Open
Abstract
Brown macroalgae are colonized by diverse microorganisms influencing the physiology of their host. However, cell-cell interactions within the surface microbiome (epimicrobiome) are largely unexplored, despite the significance of specific chemical mediators in maintaining host-microbiome homeostasis. In this study, by combining liquid chromatography coupled to mass spectrometry (LC-MS) analysis and bioassays, we demonstrated that the widely diverse fungal epimicrobiota of the brown alga Saccharina latissima can affect quorum sensing (QS), a type of cell-cell interaction, as well as bacterial biofilm formation. We also showed the ability of the bacterial epimicrobiota to form and inhibit biofilm growth, as well as to activate or inhibit QS pathways. Overall, we demonstrate that QS and anti-QS compounds produced by the epimicrobiota are key metabolites in these brown algal epimicrobiota communities and highlight the importance of exploring this epimicrobiome for the discovery of new bioactive compounds, including potentially anti-QS molecules with antifouling properties.
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Affiliation(s)
- Emilie Adouane
- Muséum National d’Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-Organismes MCAM, UMR 7245, CNRS, Sorbonne Université, 75005 Paris, France
- Sorbonne Université, CNRS, UAR 3579 Laboratoire de Biodiversité et Biotechnologies Microbiennes LBBM, Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Camille Mercier
- Sorbonne Université, CNRS, UAR 3579 Laboratoire de Biodiversité et Biotechnologies Microbiennes LBBM, Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Jeanne Mamelle
- Sorbonne Université, CNRS, UAR 3579 Laboratoire de Biodiversité et Biotechnologies Microbiennes LBBM, Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Emma Willocquet
- Sorbonne Université, CNRS, UAR 3579 Laboratoire de Biodiversité et Biotechnologies Microbiennes LBBM, Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Laurent Intertaglia
- Sorbonne Université, CNRS, Bio2Mar, Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Bertille Burgunter-Delamare
- Biologie Intégrative des Modèles Marins, LBI2M (Sorbonne Université/CNRS), Station Biologique de Roscoff (SBR), 29680 Roscoff, France
| | - Catherine Leblanc
- Biologie Intégrative des Modèles Marins, LBI2M (Sorbonne Université/CNRS), Station Biologique de Roscoff (SBR), 29680 Roscoff, France
| | - Sylvie Rousvoal
- Biologie Intégrative des Modèles Marins, LBI2M (Sorbonne Université/CNRS), Station Biologique de Roscoff (SBR), 29680 Roscoff, France
| | - Raphaël Lami
- Sorbonne Université, CNRS, UAR 3579 Laboratoire de Biodiversité et Biotechnologies Microbiennes LBBM, Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Soizic Prado
- Muséum National d’Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-Organismes MCAM, UMR 7245, CNRS, Sorbonne Université, 75005 Paris, France
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3
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Diehl N, Li H, Scheschonk L, Burgunter-Delamare B, Niedzwiedz S, Forbord S, Sæther M, Bischof K, Monteiro C. The sugar kelp Saccharina latissima I: recent advances in a changing climate. ANNALS OF BOTANY 2024; 133:183-212. [PMID: 38109285 PMCID: PMC10921839 DOI: 10.1093/aob/mcad173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/26/2023] [Accepted: 11/07/2023] [Indexed: 12/20/2023]
Abstract
BACKGROUND The sugar kelp Saccharina latissima is a Laminariales species widely distributed in the Northern Hemisphere. Its physiology and ecology have been studied since the 1960s, given its ecological relevance on western temperate coasts. However, research interest has been rising recently, driven mainly by reports of negative impacts of anthropogenically induced environmental change and by the increased commercial interest in cultivating the species, with several industrial applications for the resulting biomass. SCOPE We used a variety of sources published between 2009 to May 2023 (but including some earlier literature where required), to provide a comprehensive review of the ecology, physiology, biochemical and molecular biology of S. latissima. In so doing we aimed to better understand the species' response to stressors in natural communities, but also inform the sustainable cultivation of the species. CONCLUSION Due to its wide distribution, S. latissima has developed a variety of physiological and biochemical mechanisms to adjust to environmental changes, including adjustments in photosynthetic parameters, modulation of osmolytes and antioxidants, reprogramming of gene expression and epigenetic modifications, among others summarized in this review. This is particularly important because massive changes in the abundance and distribution of S. latissima have already been observed. Namely, presence and abundance of S. latissima has significantly decreased at the rear edges on both sides of the Atlantic, and increased in abundance at the polar regions. These changes were mainly caused by climate change and will therefore be increasingly evident in the future. Recent developments in genomics, transcriptomics and epigenomics have clarified the existence of genetic differentiation along its distributional range with implications in the fitness at some locations. The complex biotic and abiotic interactions unraveled here demonstrated the cascading effects the disappearance of a kelp forest can have in a marine ecosystem. We show how S. latissima is an excellent model to study acclimation and adaptation to environmental variability and how to predict future distribution and persistence under climate change.
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Affiliation(s)
- Nora Diehl
- Marine Botany, Faculty of Biology and Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Huiru Li
- Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, Qingdao 266003, China
| | | | - Bertille Burgunter-Delamare
- Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular Botany, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Sarina Niedzwiedz
- Marine Botany, Faculty of Biology and Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Silje Forbord
- Department of Fisheries and New Biomarine Industry, SINTEF Ocean AS, 7465 Trondheim, Norway
| | - Maren Sæther
- Seaweed Solutions AS, Bynesveien 50C, 7018 Trondheim, Norway
| | - Kai Bischof
- Marine Botany, Faculty of Biology and Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Catia Monteiro
- CIBIO, Research Centre in Biodiversity and Genetic Resources – InBIO Associate Laboratory, Campus of Vairão, University of Porto, Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus of Vairão, Vairão, Portugal
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Chukwudulue UM, Barger N, Dubovis M, Luzzatto Knaan T. Natural Products and Pharmacological Properties of Symbiotic Bacillota (Firmicutes) of Marine Macroalgae. Mar Drugs 2023; 21:569. [PMID: 37999393 PMCID: PMC10672036 DOI: 10.3390/md21110569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/25/2023] Open
Abstract
The shift from the terrestrial to the marine environment to discover natural products has given rise to novel bioactive compounds, some of which have been approved for human medicine. However, the ocean, which makes up nearly three-quarters of the Earth's surface, contains macro- and microorganisms whose natural products are yet to be explored. Among these underexplored marine organisms are macroalgae and their symbiotic microbes, such as Bacillota, a phylum of mostly Gram-positive bacteria previously known as Firmicutes. Macroalgae-associated Bacillota often produce chemical compounds that protect them and their hosts from competitive and harmful rivals. Here, we summarised the natural products made by macroalgae-associated Bacillota and their pharmacological properties. We discovered that these Bacillota are efficient producers of novel biologically active molecules. However, only a few macroalgae had been investigated for chemical constituents of their Bacillota: nine brown, five red and one green algae. Thus, Bacillota, especially from the marine habitat, should be investigated for potential pharmaceutical leads. Moreover, additional diverse biological assays for the isolated molecules of macroalgae Bacillota should be implemented to expand their bioactivity profiles, as only antibacterial properties were tested for most compounds.
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Affiliation(s)
| | | | | | - Tal Luzzatto Knaan
- Department of Marine Biology, The Charney School of Marine Sciences, University of Haifa, Mount Carmel, Haifa 103301, Israel; (U.M.C.); (N.B.); (M.D.)
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Nguyen D, Ovadia O, Guttman L. Temporal force governs the microbial assembly associated with Ulva fasciata (Chlorophyta) from an integrated multi-trophic aquaculture system. Front Microbiol 2023; 14:1223204. [PMID: 37869666 PMCID: PMC10585273 DOI: 10.3389/fmicb.2023.1223204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 09/14/2023] [Indexed: 10/24/2023] Open
Abstract
Ulva spp., one of the most important providers of marine ecosystem services, has gained substantial attention lately in both ecological and applicational aspects. It is known that macroalgae and their associated microbial community form an inseparable unit whose intimate relationship can affect the wellbeing of both. Different cultivation systems, such as integrated multi-trophic aquaculture (IMTA), are assumed to impact Ulva bacterial community significantly in terms of compositional guilds. However, in such a highly dynamic environment, it is crucial to determine how the community dynamics change over time. In the current study, we characterized the microbiota associated with Ulva fasciata grown as a biofilter in an IMTA system in the Gulf of Aqaba (Eilat, Israel) over a developmental period of 5 weeks. The Ulva-associated microbial community was identified using the 16S rRNA gene amplicon sequencing technique, and ecological indices were further analyzed. The Ulva-associated microbiome revealed a swift change in composition along the temporal succession, with clusters of distinct communities for each timepoint. Proteobacteria, Bacteroidetes, Planctomycetes, and Deinococcus-Thermus, the most abundant phyla that accounted for up to 95% of all the amplicon sequence variants (ASVs) found, appeared in all weeks. Further analyses highlighted microbial biomarkers representing each timepoint and their characteristics. Finally, the presence of highly abundant species in Ulva microbiota yet underestimated in previous research (such as phyla Deinococcus-Thermus, families Saprospiraceae, Thiohalorhabdaceae, and Pirellulaceae) suggests that more attention should be paid to the temporal succession of the assembly of microbes inhabiting macroalgae in aquaculture, in general, and IMTA, in particular. Characterizing bacterial communities associated with Ulva fasciata from an IMTA system provided a better understanding of their associated microbial dynamics and revealed this macroalgae's adaptation to such a habitat.
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Affiliation(s)
- Dzung Nguyen
- Marine Biology and Biotechnology Program, Department of Life Sciences, Ben-Gurion University of the Negev, Eilat, Israel
- Israel Oceanographic and Limnological Research, The National Center for Mariculture, Eilat, Israel
| | - Ofer Ovadia
- Department of Life Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Lior Guttman
- Israel Oceanographic and Limnological Research, The National Center for Mariculture, Eilat, Israel
- Department of Life Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
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6
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Ochoa-Sánchez M, Acuña Gomez EP, Ramírez-Fenández L, Eguiarte LE, Souza V. Current knowledge of the Southern Hemisphere marine microbiome in eukaryotic hosts and the Strait of Magellan surface microbiome project. PeerJ 2023; 11:e15978. [PMID: 37810788 PMCID: PMC10557944 DOI: 10.7717/peerj.15978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 08/07/2023] [Indexed: 10/10/2023] Open
Abstract
Host-microbe interactions are ubiquitous and play important roles in host biology, ecology, and evolution. Yet, host-microbe research has focused on inland species, whereas marine hosts and their associated microbes remain largely unexplored, especially in developing countries in the Southern Hemisphere. Here, we review the current knowledge of marine host microbiomes in the Southern Hemisphere. Our results revealed important biases in marine host species sampling for studies conducted in the Southern Hemisphere, where sponges and marine mammals have received the greatest attention. Sponge-associated microbes vary greatly across geographic regions and species. Nevertheless, besides taxonomic heterogeneity, sponge microbiomes have functional consistency, whereas geography and aging are important drivers of marine mammal microbiomes. Seabird and macroalgal microbiomes in the Southern Hemisphere were also common. Most seabird microbiome has focused on feces, whereas macroalgal microbiome has focused on the epibiotic community. Important drivers of seabird fecal microbiome are aging, sex, and species-specific factors. In contrast, host-derived deterministic factors drive the macroalgal epibiotic microbiome, in a process known as "microbial gardening". In turn, marine invertebrates (especially crustaceans) and fish microbiomes have received less attention in the Southern Hemisphere. In general, the predominant approach to study host marine microbiomes has been the sequencing of the 16S rRNA gene. Interestingly, there are some marine holobiont studies (i.e., studies that simultaneously analyze host (e.g., genomics, transcriptomics) and microbiome (e.g., 16S rRNA gene, metagenome) traits), but only in some marine invertebrates and macroalgae from Africa and Australia. Finally, we introduce an ongoing project on the surface microbiome of key species in the Strait of Magellan. This is an international project that will provide novel microbiome information of several species in the Strait of Magellan. In the short-term, the project will improve our knowledge about microbial diversity in the region, while long-term potential benefits include the use of these data to assess host-microbial responses to the Anthropocene derived climate change.
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Affiliation(s)
- Manuel Ochoa-Sánchez
- Centro de Estudios del Cuaternario de Fuego, Patagonia y Antártica (CEQUA), Punta Arenas, Chile
- Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, México
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | | | - Lia Ramírez-Fenández
- Facultad de Recursos Naturales Renovables, Universidad Arturo Prat, Iquique, Chile
- Centro de Desarrollo de Biotecnología Industrial y Bioproductos, Antofagasta, Chile
| | - Luis E. Eguiarte
- Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Valeria Souza
- Centro de Estudios del Cuaternario de Fuego, Patagonia y Antártica (CEQUA), Punta Arenas, Chile
- Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, México
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Gong G, Hong Y, Wang X, De Mandal S, Zafar J, Huang L, Jin F, Xu X. Nicotine perturbs the microbiota of brown planthopper (Nilaparvata lugens stål Hemiptera: Delphinidae). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 264:115383. [PMID: 37634480 DOI: 10.1016/j.ecoenv.2023.115383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/08/2023] [Accepted: 08/16/2023] [Indexed: 08/29/2023]
Abstract
Bacterial symbionts exhibiting co-evolutionary patterns with insect hosts play a vital role in the nutrient synthesis, metabolism, development, reproduction, and immunity of insects. The brown planthopper (BPH) has a strong ability to adapt to various environmental stresses and can develop resistance to broad-spectrum insecticides. We aimed to investigate whether gut symbionts of BPH play a major role in the detoxification of insecticides and host fitness in unfavorable environments. Nicotine-treated rice plants were exposed to BPH (early stage) and the gut microbiome of the emerging female adults were analyzed using high throughput sequencing (HTS). Nicotine administration altered the diversity and community structure of BPH symbionts with significant increases in bacterial members such as Microbacteriaceae, Comamondaceae, Enterobacteriaceae, and these changes may be associated with host survival strategies in adverse environments. Furthermore, the in-vitro study showed that four intestinal bacterial strains of BPH (Enterobacter NLB1, Bacillus cereus NL1, Ralstonia NLG26, and Delftia NLG11) could degrade nicotine when grown in a nicotine-containing medium, with the highest degradation (71%) observed in Delftia NLG11. RT-qPCR and ELISA analysis revealed an increased expression level of CYP6AY1 and P450 enzyme activities in Delftia NLG11, respectively. CYP6AY1 increased by 20% under the action of Delftia and nicotine, while P450 enzyme activity increased by 18.1%. After CYP6AY1 interference, nicotine tolerance decreased, and the mortality rate reached 76.65% on the first day and 100% on the third day. Moreover, Delftia NLG11 helped axenic BPHs to increase their survival rate when fed nicotine in the liquid-diet sac (LDS) feeding system. Compared with axenic BPHs, the survival rate improved by 25.11% on day 2% and 6.67% on day 3. These results revealed an altered gut microbiota and a cooperative relationship between Delftia NLG11 and CYP6AY1 in nicotine-treated BPH, suggesting that insects can adapt to a hostile environment by interacting with their symbionts and providing a new idea for integrated pest management strategies.
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Affiliation(s)
- Gu Gong
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, PR China
| | - Yingying Hong
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, PR China
| | - Xuemei Wang
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, PR China
| | - Surajit De Mandal
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, PR China
| | - Junaid Zafar
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, PR China
| | - Ling Huang
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, PR China
| | - Fengliang Jin
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, PR China.
| | - Xiaoxia Xu
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, PR China.
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Xiong Z, Wang R, Xia T, Zhang S, Ma S, Guo Z. Natural Products and Biological Activity from Actinomycetes Associated with Marine Algae. Molecules 2023; 28:5138. [PMID: 37446800 DOI: 10.3390/molecules28135138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023] Open
Abstract
Marine natural products have been recognized as the most promising source of bioactive substances for drug discovery research. This review illustrates the diversity of culturable actinobacteria associated with marine algae, their bioactivity and metabolites, and approaches to their isolation and determination of their biological properties. Furthermore, actinobacteria associated with marine algae are presented as a new subject for an extensive investigation to find novel and active natural products, which make them a potentially rich and innovative source for new drug development deserving more attention and exploration.
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Affiliation(s)
- Zijun Xiong
- Hainan Key Laboratory of Tropical Microbe Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China
| | - Rong Wang
- Hainan Provincial Key Laboratory of Tropical Maricultural Technologies, Hainan Academy of Ocean and Fisheries Sciences, Haikou 571126, China
| | - Tengfei Xia
- Institute of Tropical Horticulture Research, Hainan Academy of Agricultural Sciences, Haikou 571100, China
| | - Shiqing Zhang
- Hainan Key Laboratory of Tropical Microbe Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China
| | - Shuai Ma
- Hainan Key Laboratory of Tropical Microbe Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China
| | - Zhikai Guo
- Hainan Key Laboratory of Tropical Microbe Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China
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9
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Mancuso FP, Morrissey KL, De Clerck O, Airoldi L. Warming and nutrient enrichment can trigger seaweed loss by dysregulation of the microbiome structure and predicted function. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 879:162919. [PMID: 36958561 DOI: 10.1016/j.scitotenv.2023.162919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 03/05/2023] [Accepted: 03/13/2023] [Indexed: 05/17/2023]
Abstract
Warming and nutrient enrichment are key pervasive drivers of ecological shifts in both aquatic and terrestrial ecosystems, impairing the physiology and survival of a wide range of foundation species. But the underlying mechanisms often remain unclear, and experiments have overlooked the potential effects mediated by changes in the microbial communities. We experimentally tested in the field orthogonal stress combinations from simulated air warming and nutrient enrichment on the intertidal foundation seaweed Cystoseira compressa, and its associated bacterial communities. A total of 523 Amplicon Sequence Variance (ASVs) formed the bacterial community on C. compressa, with 222 ASVs assigned to 69 taxa at the genus level. Most bacteria taxa experienced changes in abundance as a result of additive (65 %) and antagonistic (30 %) interactions between the two stressors, with synergies (5 %) occurring less frequently. The analysis of the predicted bacterial functional profile identified 160 metabolic pathways, and showed that these were mostly affected by additive interactions (74 %) between air warming and nutrient enrichment, while antagonisms (20 %) and synergisms (6 %) were less frequent. Overall, the two stressors combined increased functions associated with seaweed disease or degradation of major cell-wall polymers and other algicidal processes, and decreased functions associated with Quorum Quenching and photosynthetic response. We conclude that warming and nutrient enrichment can dysregulate the microbiome of seaweeds, providing a plausible mechanism for their ongoing loss, and encourage more research into the effects of human impacts on crucial but yet largely unstudied host-microbiome relationships in different aquatic and terrestrial species.
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Affiliation(s)
- Francesco Paolo Mancuso
- Department of Earth and Marine Sciences (DiSTeM), University of Palermo, viale delle Scienze Ed. 16, 90128 Palermo, Italy; Department of Biological, Geological, and Environmental Sciences, University of Bologna, Ravenna, Italy; NBFC, National Biodiversity Future Center, Palermo 90133, Italy.
| | - Kathryn Lee Morrissey
- Phycology Research Group and Center for Molecular Phylogenetics and Evolution, Ghent University, Ghent, Belgium
| | - Olivier De Clerck
- Phycology Research Group and Center for Molecular Phylogenetics and Evolution, Ghent University, Ghent, Belgium
| | - Laura Airoldi
- NBFC, National Biodiversity Future Center, Palermo 90133, Italy; Chioggia Hydrobiological Station "Umberto D'Ancona", Department of Biology, UO CoNISMa, University of Padova, Chioggia, Italy.
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10
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Davis KM, Zeinert L, Byrne A, Davis J, Roemer C, Wright M, Parfrey LW. Successional dynamics of the cultivated kelp microbiome. JOURNAL OF PHYCOLOGY 2023; 59:538-551. [PMID: 37005360 DOI: 10.1111/jpy.13329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 01/29/2023] [Accepted: 02/26/2023] [Indexed: 06/15/2023]
Abstract
Kelp are important primary producers that are colonized by diverse microbes that can have both positive and negative effects on their hosts. The kelp microbiome could support the burgeoning kelp cultivation sector by improving host growth, stress tolerance, and resistance to disease. Fundamental questions about the cultivated kelp microbiome still need to be addressed before microbiome-based approaches can be developed. A critical knowledge gap is how cultivated kelp microbiomes change as hosts grow, particularly following outplanting to sites that vary in abiotic conditions and microbial source pools. In this study we assessed if microbes that colonize kelp in the nursery stage persist after outplanting. We characterized microbiome succession over time on two species of kelp, Alaria marginata and Saccharina latissima, outplanted to open ocean cultivation sites in multiple geographic locations. We tested for host-species specificity of the microbiome and the effect of different abiotic conditions and microbial source pools on kelp microbiome stability during the cultivation process. We found the microbiome of kelp in the nursery is distinct from that of outplanted kelp. Few bacteria persisted on kelp following outplanting. Instead, we identified significant microbiome differences correlated with host species and microbial source pools at each cultivation site. Microbiome variation related to sampling month also indicates that seasonality in host and/or abiotic factors may influence temporal succession and microbiome turnover in cultivated kelps. This study provides a baseline understanding of microbiome dynamics during kelp cultivation and highlights research needs for applying microbiome manipulation to kelp cultivation.
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Affiliation(s)
- Katherine M Davis
- Biodiversity Research Center and Department of Botany, University of British Columbia, 6270 University Blvd, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Logan Zeinert
- Centre for Applied Research, Technology and Innovation, North Island College, 1685 S Dogwood St, Campbell River, British Columbia, V9W 8C1, Canada
| | - Allison Byrne
- Centre for Applied Research, Technology and Innovation, North Island College, 1685 S Dogwood St, Campbell River, British Columbia, V9W 8C1, Canada
| | - Jonathan Davis
- School of Aquatic & Fishery Sciences, College of the Environment, University of Washington, 1122 NE Boat St, Box 355020, Seattle, Washington, 98195-5020, USA
| | - Cosmo Roemer
- M. C. Wright and Associates Ltd., 2231 Neil Drive, Nanaimo, British Columbia, V9R 6T5, Canada
| | - Michael Wright
- M. C. Wright and Associates Ltd., 2231 Neil Drive, Nanaimo, British Columbia, V9R 6T5, Canada
| | - Laura Wegener Parfrey
- Biodiversity Research Center, Department of Botany, and Department of Zoology University of British Columbia, 6270 University Blvd, Vancouver, British Columbia, V6T 1Z4, Canada
- Hakai Institute, PO Box 25039, Campbell River, British Columbia, V9W 0B7, Canada
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11
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Burgunter-Delamare B, Rousvoal S, Legeay E, Tanguy G, Fredriksen S, Boyen C, Dittami SM. The Saccharina latissima microbiome: Effects of region, season, and physiology. Front Microbiol 2023; 13:1050939. [PMID: 36687663 PMCID: PMC9858215 DOI: 10.3389/fmicb.2022.1050939] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 12/12/2022] [Indexed: 01/09/2023] Open
Abstract
Introduction Saccharina latissima is a canopy-forming species of brown algae and, as such, is considered an ecosystem engineer. Several populations of this alga are exploited worldwide, and a decrease in the abundance of S. latissima at its southern distributional range limits has been observed. Despite its economic and ecological interest, only a few data are available on the composition of microbiota associated with S. latissima and its role in algal physiologyn. Methods We studied the whole bacterial community composition associated with S. latissima samples from three locations (Brittany, Helgoland, and Skagerrak) by 16S metabarcoding analyses at different scales: algal blade part, regions, season (at one site), and algal physiologic state. Results and Discussion We have shown that the difference in bacterial composition is driven by factors of decreasing importance: (i) the algal tissues (apex/meristem), (ii) the geographical area, (iii) the seasons (at the Roscoff site), and (iv) the algal host's condition (healthy vs. symptoms). Overall, Alphaproteobacteria, Gammaproteobacteria, and Bacteroidia dominated the general bacterial communities. Almost all individuals hosted bacteria of the genus Granulosicoccus, accounting for 12% of the total sequences, and eight additional core genera were identified. Our results also highlight a microbial signature characteristic for algae in poor health independent of the disease symptoms. Thus, our study provides a comprehensive overview of the S. latissima microbiome, forming a basis for understanding holobiont functioning.
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Affiliation(s)
- Bertille Burgunter-Delamare
- CNRS, Sorbonne Université, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Roscoff, France,*Correspondence: Bertille Burgunter-Delamare,
| | - Sylvie Rousvoal
- CNRS, Sorbonne Université, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Roscoff, France
| | - Erwan Legeay
- FR2424 Station Biologique de Roscoff, CNRS, Sorbonne Université, Roscoff, France
| | - Gwenn Tanguy
- FR2424 Station Biologique de Roscoff, CNRS, Sorbonne Université, Roscoff, France
| | | | - Catherine Boyen
- CNRS, Sorbonne Université, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Roscoff, France,FR2424 Station Biologique de Roscoff, CNRS, Sorbonne Université, Roscoff, France
| | - Simon M. Dittami
- CNRS, Sorbonne Université, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Roscoff, France,Simon M. Dittami,
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12
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Asharaf S, Chakraborty K. Pharmacological potential of seaweed-associated heterotrophic Firmicutes. Lett Appl Microbiol 2022; 75:1042-1054. [PMID: 35771159 DOI: 10.1111/lam.13780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/11/2022] [Accepted: 06/21/2022] [Indexed: 11/27/2022]
Abstract
Seaweed-associated bacterial symbionts are sources of potential pharmacological properties. The present study resulted in the culture-dependent isolation of bioactive heterotrophs belonging to the bacterial phylum Firmicutes, which were dominated more than 30% of the 127 cultivable isolates, among which 23 of them showed potential antimicrobial activities against a wide range of pathogens. The symbionts isolated from the seaweed Sargassum wightii showed significant bioactivity. Those were characterised as Bacillus safensis MTCC13040, B. valismortis MTCC13041, B. velezensis MTCC13044, B. methylotrophicus MTCC13042, Oceanobacillus profundus MTCC13045, B. tequilensis MTCC13043, and B. altitudinis MTCC13046. The organic extracts of the studied isolates showed potential antimicrobial properties against methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococci (minimum inhibitory concentration 6.25-12.5 μg ml-1 ). The organic extract of B. altitudinis MTCC13046 displayed significantly greater radical quenching ability (IC90 133 μg ml-1 , p < 0.05) other than attenuating hydroxymethyl glutaryl coenzyme A reductase (IC90 10.21 μg ml-1 , p < 0.05) and angiotensin converting enzyme-1 (IC90 498 μg ml-1 , p < 0.05) relative to other studied heterotrophs. The organic extract of B. tequilensis MTCC13043 displayed significantly greater attenuation potential against pro-inflammatory 5-lipooxygenase (IC90 5.94 μg ml-1 , p < 0.05) and dipeptidyl peptidase-4 (IC90 271 μg ml-1 , p < 0.05). The seaweed-associated B. altitudinis MTCC13046 and B. tequilensis MTCC13043 could be used to develop promising pharmacological leads.
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Affiliation(s)
- Sumayya Asharaf
- Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No, 1603, Cochin, -682018, Kerala State, India.,Faculty of Marine Sciences, Lakeside Campus, Cochin University of Science and Technology, Cochin, Kerala State, India
| | - Kajal Chakraborty
- Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No, 1603, Cochin, -682018, Kerala State, India
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13
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A Retrospective Review of Global Commercial Seaweed Production-Current Challenges, Biosecurity and Mitigation Measures and Prospects. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19127087. [PMID: 35742332 PMCID: PMC9222978 DOI: 10.3390/ijerph19127087] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 11/17/2022]
Abstract
Commercial seaweed cultivation has undergone drastic changes to keep up with the increasing demand in terms of the quantity and quality of the algal biomass needed to meet the requirements of constant innovation in industrial applications. Diseases caused by both biotic and abiotic factors have been identified as contributing to the economic loss of precious biomass. Biosecurity risk will eventually affect seaweed production as a whole and could cripple the seaweed industry. The current review sheds light on the biosecurity measures that address issues in the seaweed industry pushing towards increasing the quantity and quality of algal biomass, research on algal diseases, and tackling existing challenges as well as discussions on future directions of seaweed research. The review is presented to provide a clear understanding of the latest biosecurity developments from several segments in the seaweed research, especially from upstream cultivation encompassing the farming stages from seeding, harvesting, drying, and packing, which may lead to better management of this precious natural resource, conserving ecological balance while thriving on the economic momentum that seaweed can potentially provide in the future. Recommended breeding strategies and seedling stock selection are discussed that aim to address the importance of sustainable seaweed farming and facilitate informed decision-making. Sustainable seaweed cultivation also holds the key to reducing our carbon footprint, thereby fighting the existential crisis of climate change plaguing our generation.
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14
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Burgunter-Delamare B, Tanguy G, Legeay E, Boyen C, Dittami SM. Effects of sampling and storage procedures on 16S rDNA amplicon sequencing results of kelp microbiomes. Mar Genomics 2022; 63:100944. [PMID: 35299055 DOI: 10.1016/j.margen.2022.100944] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 02/24/2022] [Accepted: 02/24/2022] [Indexed: 10/18/2022]
Abstract
Brown macroalgae, including the kelp Saccharina latissima, are of both ecological and increasing economic interest. Together with their microbiota, these organisms form a singular entity, the holobiont. Sampling campaigns are required to study the microbiome of algae in natural populations, but freezing samples in liquid nitrogen is complex in the field, particularly at remote locations. Here we tested two simple alternative methods for sampling the microbial diversity associated with the kelp S. latissima: silica gel conservation of tissue and swab samples preserved in DNA/RNA shield solution. We used these techniques to compare apex and meristem samples from Roscoff (Brittany, France) and evaluated their impact on the results of 16S rDNA metabarcoding experiments. Both methods were able to separate apex and meristem microbiomes, and the results were concordant with results obtained for flash-frozen samples. However, differences were observed for several rare genera and ASVs, and the detection of contaminant sequences in the silica gel-preserved samples underline the importance of including blank samples for this method. Globally, our results confirm that the silica gel technique and swabbing combined with DNA/RNA shield preservation are valid alternatives to liquid nitrogen preservation when sampling brown macroalgae in the field. However, they also underline that, regardless of the method, caution should be taken when interpreting data on rare sequences.
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Affiliation(s)
- Bertille Burgunter-Delamare
- CNRS, Sorbonne Université, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, 29680 Roscoff, France.
| | - Gwenn Tanguy
- CNRS, Sorbonne Université, FR2424 Station Biologique de Roscoff, 29680 Roscoff, France
| | - Erwan Legeay
- CNRS, Sorbonne Université, FR2424 Station Biologique de Roscoff, 29680 Roscoff, France
| | - Catherine Boyen
- CNRS, Sorbonne Université, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, 29680 Roscoff, France; CNRS, Sorbonne Université, FR2424 Station Biologique de Roscoff, 29680 Roscoff, France
| | - Simon M Dittami
- CNRS, Sorbonne Université, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, 29680 Roscoff, France.
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15
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Sadiq FA, Hansen MF, Burmølle M, Heyndrickx M, Flint S, Lu W, Chen W, Zhang H. Towards understanding mechanisms and functional consequences of bacterial interactions with members of various kingdoms in complex biofilms that abound in nature. FEMS Microbiol Rev 2022; 46:6595875. [PMID: 35640890 DOI: 10.1093/femsre/fuac024] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 04/11/2022] [Accepted: 05/27/2022] [Indexed: 11/12/2022] Open
Abstract
The microbial world represents a phenomenal diversity of microorganisms from different kingdoms of life which occupy an impressive set of ecological niches. Most, if not all, microorganisms once colonise a surface develop architecturally complex surface-adhered communities which we refer to as biofilms. They are embedded in polymeric structural scaffolds serve as a dynamic milieu for intercellular communication through physical and chemical signalling. Deciphering microbial ecology of biofilms in various natural or engineered settings has revealed co-existence of microorganisms from all domains of life, including Bacteria, Archaea and Eukarya. The coexistence of these dynamic microbes is not arbitrary, as a highly coordinated architectural setup and physiological complexity show ecological interdependence and myriads of underlying interactions. In this review, we describe how species from different kingdoms interact in biofilms and discuss the functional consequences of such interactions. We highlight metabolic advances of collaboration among species from different kingdoms, and advocate that these interactions are of great importance and need to be addressed in future research. Since trans-kingdom biofilms impact diverse contexts, ranging from complicated infections to efficient growth of plants, future knowledge within this field will be beneficial for medical microbiology, biotechnology, and our general understanding of microbial life in nature.
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Affiliation(s)
- Faizan Ahmed Sadiq
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.,Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Technology & Food Sciences Unit, Melle, Belgium
| | - Mads Frederik Hansen
- Section of Microbiology, Department of Biology, University of Copenhagen, Denmark
| | - Mette Burmølle
- Section of Microbiology, Department of Biology, University of Copenhagen, Denmark
| | - Marc Heyndrickx
- Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Technology & Food Sciences Unit, Melle, Belgium.,Department of Pathology, Bacteriology and Poultry Diseases, Ghent University, Merelbeke, Belgium
| | - Steve Flint
- School of Food and Advanced Technology, Massey University, Private Bag, 11222, Palmerston North, New Zealand
| | - Wenwei Lu
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Wei Chen
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
| | - Hao Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
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16
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Moubayed NM, Al Houri HJ, Bukhari SI. Turbinaria ornata and its associated epiphytic Bacillus sp. A promising molecule supplier to discover new natural product approaches. Saudi J Biol Sci 2022; 29:2532-2540. [PMID: 35531156 PMCID: PMC9072896 DOI: 10.1016/j.sjbs.2021.12.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/11/2021] [Accepted: 12/14/2021] [Indexed: 11/08/2022] Open
Abstract
Marine ecosystems are highly dependent on macroalgea in providing food and shelter for aquatic organisms, interacting with many bacteria and mostly producing secondary metabolites of potent therapeutic antibacterial property. Screening of marine microbial secondary metabolites of valuable biotechnological and therapeutical applications are now extensively studied. In this study, Bacillus spp. identified by DNA sequencing and found associated with Turbinaria ornata, was screened and characterized for its cell free supernatant (CFS) possible antimicrobial and antibiofilm applications. Among the 7 microbial isolates tested, CFS greatly affected Bacillus subitilis (12 mm) and inhibited equally the yeast isolates Candida albicans, Candida tropicalis and Candida glabrata (10 mm) and had no or negligible effect on S.aureus, E.coli, P. aeruginosa. As for the CFS antibiofilm activity, no difference was revealed from the positive control. Algal crude extracts (methanol, acetone and aqueous), on the other hand, were similarly tested for their antimicrobial activity against the seven microbial isolates, where highest activity was observed with the aqueous crude extract against Staphylococcus aureus(10 mm) and Pseudomonas aeruginosa (9 mm) compared to the negligible effects of methanol and acetone crude extracts. Chemical analysis was performed to reveal the major constituents of both crude algal extracts and Bacillus spp. CFS. FTIR spectrum of the bacterial CFS indicated the presence of bacteriocin as the major lipopeptide responsible for its biological activity. Whereas, methanol and water crude algal extract GC-MS spectra revealed different chemical groups of various combined therapeutical activity mainly Naphthalene, amino ethane-sulfonic acid, pyrlene, Biotin and mercury chloromethyl correspondingly. Thus, the present study, demonstrated the moderate activity of both crude algal extract and the bacterial CFS, however, further investigations are needed for a better biological activity.
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Affiliation(s)
- Nadine M.S. Moubayed
- Botany and Microbiology Department, Science College, Female Campus, King Saud University, Riyadh 11495, Saudi Arabia
| | - Hadeel J. Al Houri
- Botany and Microbiology Department, Science College, Female Campus, King Saud University, Riyadh 11495, Saudi Arabia
| | - Sarah I. Bukhari
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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17
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Tai CJ, Ahmed AF, Chao CH, Yen CH, Hwang TL, Chang FR, Huang YM, Sheu JH. The Chemically Highly Diversified Metabolites from the Red Sea Marine Sponge Spongia sp. Mar Drugs 2022; 20:md20040241. [PMID: 35447914 PMCID: PMC9028682 DOI: 10.3390/md20040241] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/24/2022] [Accepted: 03/27/2022] [Indexed: 01/18/2023] Open
Abstract
A polyoxygenated and halogenated labdane, spongianol (1); a polyoxygenated steroid, 3β,5α,9α-trihydroxy-24S-ethylcholest-7-en-6-one (2); a rare seven-membered lactone B ring, (22E,24S)-ergosta-7,22-dien-3β,5α-diol-6,5-olide (3); and an α,β-unsaturated fatty acid, (Z)-3-methyl-9-oxodec-2-enoic acid (4) as well as five known compounds, 10-hydroxykahukuene B (5), pacifenol (6), dysidamide (7), 7,7,7-trichloro-3-hydroxy-2,2,6-trimethyl-4-(4,4,4-trichloro-3-methyl-1-oxobu-tylamino)-heptanoic acid methyl ester (8), and the primary metabolite 2’-deoxynucleoside thymidine (9), have been isolated from the Red Sea sponge Spongia sp. The stereoisomer of 3 was discovered in Ganoderma resinaceum, and metabolites 5 and 6, isolated previously from red algae, were characterized unprecedentedly in the sponge. Compounds 7 and 8 have not been found before in the genus Spongia. Compounds 1–9 were also assayed for cytotoxicity as well as antibacterial and anti-inflammatory activities.
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Affiliation(s)
- Chi-Jen Tai
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;
| | - Atallah F. Ahmed
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Chih-Hua Chao
- School of Pharmacy, China Medical University, Taichung 406040, Taiwan;
- Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung 406040, Taiwan
| | - Chia-Hung Yen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (C.-H.Y.); (F.-R.C.)
| | - Tsong-Long Hwang
- Graduate Institute of Natural Products, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan;
- Research Center for Chinese Herbal Medicine, Graduate Institute of Healthy Industry Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
| | - Fang-Rong Chang
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (C.-H.Y.); (F.-R.C.)
| | - Yusheng M. Huang
- Department of Marine Recreation, National Penghu University of Science and Technology, Magong 880011, Taiwan;
- Tropical Island Sustainable Development Research Center, National Penghu University of Science and Technology, Magong 880011, Taiwan
| | - Jyh-Horng Sheu
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (C.-H.Y.); (F.-R.C.)
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404333, Taiwan
- Correspondence: ; Tel.: +886-7-525-2000 (ext. 5030); Fax: +886-7-525-5020
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18
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Antibiotic-active heterotrophic Firmicutes sheltered in seaweeds: can they add new dimensions to future antimicrobial agents? Arch Microbiol 2022; 204:183. [PMID: 35179656 DOI: 10.1007/s00203-022-02784-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 01/22/2022] [Accepted: 01/28/2022] [Indexed: 11/02/2022]
Abstract
Appearance of drug-resistant microorganisms prompted researchers to unravel new environments for development of novel antimicrobial agents. Culture-supported analysis of heterotrophic bacteria associated with seaweeds yielded 152 strains, in that larger share of the isolates was embodied by Bacillus atrophaeus SHB2097 (54%), B. velezensis SHB2098 (24%), B. subtilis SHB2099 (12%), and B. amyloliquefaciens SHB20910 (10%). One of the most active strains characterized as B. atrophaeus SHB2097 (MW821482) with an inhibition zone more than 30 mm on spot-over-lawn experiment, was isolated from a seaweed Sargassum wightii, was selected for bioprospecting studies. Significant antibacterial potential was displayed by bacterial organic extract against vancomycin-resistant Enterococcus faecalis, Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus, and Klebsiella pneumonia with minimum inhibitory concentration 6.25 µg/mL and comparable to the antibiotics ampicillin and chloramphenicol. The genes of type 1 pks (MZ222383, 700 bp) and hybrid nrps/pks (MZ222389, 1000-1400 bp) of B. atrophaeus MW821482 could be amplified. The bacterium displayed susceptibility to the commercially available antibiotic agents, and was negative for the pore-forming non-hemolytic hemolysin BL (hbl) and enterotoxin (nhe) genes, and therefore, was not pathogenic. The bacterium was found to possess genes (1000-1400 bp) involved in the biosynthesis of siderophore-class of compounds (MZ222387 and MZ222388) that showed 99% of similarity in BLAST search, and showed production of siderophore. Noteworthy antibacterial activities against clinically important pathogenic bacteria in conjunction with occurrence of genes coding for antimicrobial metabolites inferred that the marine heterotrophic bacterium B. atrophaeus SHB2097 could be used for the development of antibacterial agents against the emerging antibiotic resistance.
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Wang H, Elyamine AM, Liu Y, Liu W, Chen Q, Xu Y, Peng T, Hu Z. Hyunsoonleella sp. HU1-3 Increased the Biomass of Ulva fasciata. Front Microbiol 2022; 12:788709. [PMID: 35173690 PMCID: PMC8841488 DOI: 10.3389/fmicb.2021.788709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Accepted: 12/09/2021] [Indexed: 11/13/2022] Open
Abstract
Green algae are photosynthetic organisms and play an important role in coastal environment. The microbial community on the surface of green algae has an effect on the health and nutrition of the host. However, few species of epiphytic microbiota have been reported to play a role in promoting the growth of algae. In this study, 16S rDNA sequencing was used to study the changes of microbial composition on the surface of Ulva fasciata at different growth stages. Some growth promoting bacteria were identified. The possible growth-promoting behavior of the strains were verified by co-culture of pure bacteria obtained from the surface of U. fasciata with its sterile host. Among the identified species, a new bacterial species, Hyunsoonleella sp. HU1-3 (belonging to the family Flavobacteriaceae) significantly promoted the growth of U. fasciata. The results also showed that there were many genes involved in the synthesis of growth hormone and cytokinin in the genome of Hyunsoonleella sp. HU1-3. This study identified the bacterium Hyunsoonleella sp. HU1-3 for the first time, in which this bacterium has strong growth-promoting effects on U. fasciata. Our findings not only provide insights on the establishment of the surface microbiota of U. fasciata, but also indicate that Hyunsoonleella sp. HU1-3 is one of the important species to promote the growth of U. fasciata.
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Affiliation(s)
- Han Wang
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou, China
| | - Ali Mohamed Elyamine
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou, China
| | - Yuchun Liu
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou, China
| | - Wei Liu
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou, China
| | - Qixuan Chen
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou, China
| | - Yan Xu
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou, China
- Heyuan Polytechnic, Heyuan, China
| | - Tao Peng
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou, China
| | - Zhong Hu
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou, China
- Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
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20
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Florez JZ, Camus C, Hengst MB, Buschmann AH. A mesocosm study on bacteria-kelp interactions: Importance of nitrogen availability and kelp genetics. JOURNAL OF PHYCOLOGY 2021; 57:1777-1791. [PMID: 34570392 DOI: 10.1111/jpy.13213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 06/12/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
Macroalgal holobiont studies involve understanding interactions between the host, its microbiota, and the environment. We analyzed the effect of bacteria-kelp interactions on phenotypic responses of two genetically distinct populations of giant kelp, Macrocystis pyrifera (north and south), exposed to different nitrogen (N) concentrations. In co-culture experiments with different N concentration treatments, we evaluated kelp growth responses and changes in three specific molecular markers associated with the N cycle, both in epiphytic bacteria (relative abundance of nrfA-gene: cytochrome c nitrite reductase) and macroalgae (expression of NR-gene: nitrate reductase; GluSyn-gene: glutamate synthase). Both kelp populations responded differently to N limitation, with M. pyrifera-south sporophytes having a lower specific growth rate (SGR) under N-limiting conditions than the northern population; M. pyrifera-north sporophytes showed no significant differences in SGR when exposed to low-N and high-N concentrations. This corresponded to a higher GluSyn-gene expression in the M. pyrifera-north sporophytes and the co-occurrence of specific nrfA bacterial taxa. These bacteria may increase ammonium availability under low-N concentrations, allowing M. pyrifera-north to optimize nutrient assimilation by increasing the expression of GluSyn. We conclude that bacteria-kelp interactions are important in enhancing kelp growth rates under low N availability, although this effect may be regulated by the genetic background of kelp populations.
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Affiliation(s)
- July Z Florez
- Programa de Doctorado en Ciencias mención Conservación y Manejo de Recursos Naturales, Universidad de Los Lagos, Puerto Montt, Chile
- Centro i˜mar and CeBiB, Universidad de Los Lagos, Puerto Montt, Chile
- Departamento de Ciencias Farmacéuticas, Universidad Católica del Norte, Antofagasta, Chile
| | - Carolina Camus
- Centro i˜mar and CeBiB, Universidad de Los Lagos, Puerto Montt, Chile
| | - Martha B Hengst
- Departamento de Ciencias Farmacéuticas, Universidad Católica del Norte, Antofagasta, Chile
- Centro de Biotecnología y Bioingeniería (CeBiB), Santiago, Chile
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Marine macroalga-associated heterotrophic Bacillus velezensis: a novel antimicrobial agent with siderophore mode of action against drug-resistant nosocomial pathogens. Arch Microbiol 2021; 203:5561-5575. [PMID: 34436634 DOI: 10.1007/s00203-021-02513-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/29/2021] [Accepted: 08/04/2021] [Indexed: 12/29/2022]
Abstract
Increased prevalence of microbial resistance and development of drug-resistant pathogens have triggered an urge among researchers to discover potential antimicrobial compounds, particularly from the marine habitat. The present study highlights the cultivable diversity and bioactivities of heterotrophic bacteria associated with marine macroalgae of southeast Indian coastal region. Culture-dependent isolation method resulted in 40 isolates, in which greater part of the isolates represented Gammaproteobacteria (62%) followed by that comprised of the phylum Firmicutes. One of the most active strains isolated from a macroalga, Laurencia papillosa, was characterized based on the integrated phenotypic and genotypic analysis as Bacillus velezensis MBTDLP1 MTCC 13048, with an inhibition zone of about 35 mm against methicillin-resistant Staphylococcus aureus (MRSA), was selected for bioprospecting studies. Type-I pks gene (MT394492) of 700 bp could be amplified from the heterotrophic B. velezensis. The bacterium exhibited siderophore production and possessed genes implicated in the biosynthesis of siderophore type of metabolites exhibiting 99% similarity with other GenBank sequences in BLAST search. B. velezensis exhibited promising anti-infective properties against methicillin-resistant Staphylococcus aureus (minimum inhibitory concentration 15 µg/mL), and the activities were positively correlated (r2 > 0.9) with iron-chelating activities. Chemical investigation of the organic extract of B. velezensis MBTDLP1 characterized a macrocyclic polyketide exhibiting prospective antibacterial potential against methicillin-resistant S. aureus (MIC 0.38 µg/mL), than that exhibited by positive control chloramphenicol (6.25 µg/mL). Significant antibacterial activity against drug-resistant bacteria combined with the presence of genes coding for bioactive secondary metabolites revealed that this marine symbiotic bacterium could be used against emerging antibiotic resistance.
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22
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Tangestani M, Broady P, Varsani A. An investigation of antibacterial activity of New Zealand seaweed-associated marine bacteria. Future Microbiol 2021; 16:1167-1179. [PMID: 34615384 DOI: 10.2217/fmb-2021-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: To explore seaweed-associated bacteria as prospective producers of bioactive material with antibacterial properties. Materials & methods: 143 bacterial species were isolated from the surface of 15 New Zealand marine macroalgae. Bacterial extracts obtained using dimethyl sulfoxide and ethyl acetate were screened for antagonistic activities against three antimicrobial susceptibility indicators: Kocuria rhizophila, Staphylococcus epidermidis and Escherichia coli, using well-diffusion method. For selected species, minimum inhibitory concentration was determined, followed by a phylogenetic identification based on 16S rRNA gene sequences. Results: Among all bacteria screened, seven that belonged to the genera Vibrio, Pseudoalteromonas, Psychromonas and Cobetia, showed antagonistic activity against all three indicators. Conclusion: Seaweed-associated bacteria produce bioactive compounds with antimicrobial potential and possible biomedical application in aquatic habitats.
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Affiliation(s)
- Mehrnoush Tangestani
- College of Engineering, University of Canterbury, Christchurch, 8140, New Zealand
| | - Paul Broady
- School of Biological Sciences, University of Canterbury, Christchurch, 8140, New Zealand
| | - Arvind Varsani
- The Biodesign Center for Fundamental & Applied Microbiomics, Center for Evolution & Medicine, School of Life Sciences, Arizona State University, Tempe, AZ 85287-5001, USA
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23
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Qu T, Hou C, Zhao X, Zhong Y, Guan C, Lin Z, Tang X, Wang Y. Bacteria associated with Ulva prolifera: a vital role in green tide formation and migration. HARMFUL ALGAE 2021; 108:102104. [PMID: 34588120 DOI: 10.1016/j.hal.2021.102104] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 08/30/2021] [Accepted: 09/01/2021] [Indexed: 06/13/2023]
Abstract
Ulva prolifera green tide in the Yellow Sea of China is a typical cross-regional marine ecological disaster. We hypothesized that the complex interactions between U. prolifera and its associated bacterial communities possibly impact the formation and outbreak of green tide. To test this hypothesis, the U. prolifera-associated bacterial community changes in the entire migration area were investigated through field sampling and high-throughput sequencing. The results showed that (1) with the green tide migration, the richness and diversity increased for U. prolifera epiphytic bacterial communities, while they decreased for seawater bacterial communities in the phycosphere. (2) The richness, diversity, and community composition of U. prolifera-associated bacteria changed more dramatically in the 35.00°N sea area. (3) Potential interactions between bacteria and U. prolifera existed during the entire long-distance migration of green tide, and six bacterial functional groups (BFGs) were defined. Growth-regulating BFG I and antibacterial and stress-resistance BFG II were the dominant communities in the early stage of the green tide migration, which have the role of regulating algal growth and synergistic protection. Heterotrophic BFG III and algicidal BFG IV were the dominant communities in the late stage of the green tide migration, and they were able to compete with algae for nutrients and inhibit algal growth. Nutritive BFG V and algae-derived nutritional type BFG VI symbiotically lived with algal host. Our study highlights the spatial and temporal complexity of U. prolifera-associated bacterial communities and provides valuable insights into the potential contribution of U. prolifera-associated bacterial communities to green tide outbreaks.
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Affiliation(s)
- Tongfei Qu
- College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| | - Chengzong Hou
- College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| | - Xinyu Zhao
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
| | - Yi Zhong
- College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| | - Chen Guan
- College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| | - Zhihao Lin
- College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| | - Xuexi Tang
- College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
| | - Ying Wang
- College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
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24
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Phelps CM, McMahon K, Bissett A, Bernasconi R, Steinberg PD, Thomas T, Marzinelli EM, Huggett MJ. The surface bacterial community of an Australian kelp shows cross-continental variation and relative stability within regions. FEMS Microbiol Ecol 2021; 97:fiab089. [PMID: 34156064 DOI: 10.1093/femsec/fiab089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 06/18/2021] [Indexed: 11/12/2022] Open
Abstract
Epiphytic microbial communities often have a close relationship with their eukaryotic host, assisting with defence, health, disease prevention and nutrient transfer. Shifts in the structure of microbial communities could therefore have negative effects on the individual host and indirectly impact the surrounding ecosystem, particularly for major habitat-forming hosts, such as kelps in temperate rocky shores. Thus, an understanding of the structure and dynamics of host-associated microbial communities is essential for monitoring and assessing ecosystem changes. Here, samples were taken from the ecologically important kelp, Ecklonia radiata, over a 17-month period, from six different sites in two distinct geographic regions (East and West coasts of Australia), separated by ∼3,300 kms, to understand variation in the kelp bacterial community and its potential environmental drivers. Differences were observed between kelp bacterial communities between the largely disconnected geographical regions. In contrast, within each region and over time the bacterial communities were considerably more stable, despite substantial seasonal changes in environmental conditions.
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Affiliation(s)
- Charlie M Phelps
- Centre for Marine Ecosystems Research, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia
| | - Kathryn McMahon
- Centre for Marine Ecosystems Research, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia
| | - Andrew Bissett
- CSIRO Oceans and Atmosphere, Castray Esp, Battery Point, Tas, 7004, Australia
| | - Rachele Bernasconi
- Centre for Marine Ecosystems Research, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia
| | - Peter D Steinberg
- Sydney Institute of Marine Science, 19 Chowder Bay Rd, Mosman, NSW, 2088, Australia
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, High St, Kensington, NSW, 2052, Australia
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 60 Nanyang Dr, Singapore 637551
| | - Torsten Thomas
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, High St, Kensington, NSW, 2052, Australia
| | - Ezequiel M Marzinelli
- Sydney Institute of Marine Science, 19 Chowder Bay Rd, Mosman, NSW, 2088, Australia
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 60 Nanyang Dr, Singapore 637551
- The University of Sydney, School of Life and Environmental Sciences, Coastal and Marine Ecosystems, City Rd, Camperdown, NSW, 2006, Australia
| | - Megan J Huggett
- Centre for Marine Ecosystems Research, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia
- School of Environmental and Life Sciences, University of Newcastle, 10 Chittaway Rd, Ourimbah, NSW, 2258, Australia
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25
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Davis KM, Mazel F, Parfrey LW. The microbiota of intertidal macroalgae Fucus distichus is site-specific and resistant to change following transplant. Environ Microbiol 2021; 23:2617-2631. [PMID: 33817918 DOI: 10.1111/1462-2920.15496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 01/04/2023]
Abstract
It is unclear how host-associated microbial communities will be affected by future environmental change. Characterizing how microbiota differ across sites with varying environmental conditions and assessing the stability of the microbiota in response to abiotic variation are critical steps towards predicting outcomes of environmental change. Intertidal organisms are valuable study systems because they experience extreme variation in environmental conditions on tractable timescales such as tide cycles and across small spatial gradients in the intertidal zone. Here we show a widespread intertidal macroalgae, Fucus distichus, hosts site-specific microbiota over small (meters to kilometres) spatial scales. We demonstrate stability of site-specific microbial associations by manipulating the host environment and microbial species pool with common garden and reciprocal transplant experiments. We hypothesized that F. distichus microbiota would readily shift to reflect the contemporary environment due to selective filtering by abiotic conditions and/or colonization by microbes from the new environment or nearby hosts. Instead, F. distichus microbiota was stable for days after transplantation in both the laboratory and field. Our findings expand the current understanding of microbiota dynamics on an intertidal foundation species. These results may also point to adaptations for withstanding short-term environmental variation, in hosts and/or microbes, facilitating stable host-microbial associations.
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Affiliation(s)
- Katherine M Davis
- Biodiversity Research Centre, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Florent Mazel
- Biodiversity Research Centre, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Laura Wegener Parfrey
- Biodiversity Research Centre, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- Department of Zoology, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- Hakai Institute, PO Box 309, Heriot Bay, BC, V0P 1H0, Canada
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26
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Marine macroalga-associated heterotroph Bacillus velezensis as prospective therapeutic agent. Arch Microbiol 2021; 203:1671-1682. [PMID: 33439297 DOI: 10.1007/s00203-020-02169-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/02/2020] [Accepted: 12/27/2020] [Indexed: 12/13/2022]
Abstract
Marine macroalgae and their accompanying microbial flora were proved to be the reservoir of potential bioactive compounds with promising pharmacological applications. Heterotrophic bacteria concomitant with the marine algae were isolated and screened for their antibacterial potential against clinically recognized pathogens. The bacterial isolate with greater bioactive properties was identified as Bacillus velezensis MBTDLP1 (phylum Firmicutes), which was isolated from the marine macroalga Laurencia papillosa, by integrated morphological, biochemical and molecular characterization. B. velezensis showed promising antibacterial property against methicillin-resistant Staphylococcus aureus and Vibrio parahemolyticus with inhibition zone of 32-36 mm. Organic ethyl acetate extract of the isolate also displayed prospective antibacterial activity against the test pathogens (minimum inhibitory concentration 7.5-15 µg/mL), coupled with promising antioxidant (IC50 0.1-0.9 mg/mL against oxidants), anti-inflammatory (IC50 0.01 mg/mL against 5-lipoxygenase), and carbolytic enzyme attenuation properties (IC50 0.1-0.4 mg/mL in response to α-amylase and α-glucosidase). Significant anticancer potential against breast carcinoma (MCF-7) cells (IC50 0.03 mg/mL) coupled with lesser cytotoxicity to the normal fibroblast (3T3L) cells (IC50 0.14 mg/mL) were also recognized. The apoptosis assay could give reasonable outcome as the organic extract of B. velezensis induced apoptosis to 81% of the cancer cells while maintaining almost 60% viability in normal cells. The results put forward that B. velezensis MBTDLP1 could be used to isolate bioactive compounds with therapeutic potential and biomedical applications.
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27
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Na G, Zhang W, Gao H, Wang C, Li R, Zhao F, Zhang K, Hou C. Occurrence and antibacterial resistance of culturable antibiotic-resistant bacteria in the Fildes Peninsula, Antarctica. MARINE POLLUTION BULLETIN 2021; 162:111829. [PMID: 33243441 DOI: 10.1016/j.marpolbul.2020.111829] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 08/14/2020] [Accepted: 11/03/2020] [Indexed: 05/12/2023]
Abstract
Quantifying the occurrence of Antarctic antibiotic-resistant bacteria (ARB) is essential for assessing the level of pollution and assessing the "baseline" or background level of ARB in human uninhabited environments. Animal feces, soil, and sediments were sampled from Fildes Peninsula. The abundance of sulfamethazine- and ciprofloxacin-resistance bacteria and antibotic resistance genes (ARGs) within ARB were investigated. The results showed Ciprofloxacin- and Sulfamethazine-resistant bacteria isolated from samples accounted for the highest abundances of 30 CFU/g and 79.8 CFU/g, respectively. The dominant genus of Sulfamethazine-and quinolone-resistance bacteria was Pseudomonas and Arthrobacter, respectively. 106 ARGs were detected from ARB. Strong positive correlations between mobile genetic elements (MGEs) and ARGs were found, what is relatively novel observation that the mechanism is confirmed to also occur in the Antarctic. This study reveals the compositional characteristics of ARGs of strains in Antarctic, providing support for the source of Antarctic antibiotic resistance and drug resistance mechanisms.
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Affiliation(s)
- Guangshui Na
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; National Marine Environmental Monitoring Center, Dalian 116023, China; College of Ecology and Environment, Hainan Tropical Ocean University, Sanya 572022, China; College of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China.
| | - Wanli Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Hui Gao
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Caixia Wang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Ruijing Li
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Fuqiang Zhao
- National Marine Environmental Monitoring Center, Dalian 116023, China; College of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China
| | - Keyu Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Chao Hou
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; National Marine Environmental Monitoring Center, Dalian 116023, China
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28
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Utermann C, Blümel M, Busch K, Buedenbender L, Lin Y, Haltli BA, Kerr RG, Briski E, Hentschel U, Tasdemir D. Comparative Microbiome and Metabolome Analyses of the Marine Tunicate Ciona intestinalis from Native and Invaded Habitats. Microorganisms 2020; 8:microorganisms8122022. [PMID: 33348696 PMCID: PMC7767289 DOI: 10.3390/microorganisms8122022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/09/2020] [Accepted: 12/15/2020] [Indexed: 12/12/2022] Open
Abstract
Massive fouling by the invasive ascidian Ciona intestinalis in Prince Edward Island (PEI, Canada) has been causing devastating losses to the local blue mussel farms. In order to gain first insights into so far unexplored factors that may contribute to the invasiveness of C. intestinalis in PEI, we undertook comparative microbiome and metabolome studies on specific tissues from C. intestinalis populations collected in invaded (PEI) and native regions (Helgoland and Kiel, Germany). Microbial community analyses and untargeted metabolomics revealed clear location- and tissue-specific patterns showing that biogeography and the sampled tissue shape the microbiome and metabolome of C. intestinalis. Moreover, we observed higher microbial and chemical diversity in C. intestinalis from PEI than in the native populations. Bacterial OTUs specific to C. intestinalis from PEI included Cyanobacteria (e.g., Leptolyngbya sp.) and Rhodobacteraceae (e.g., Roseobacter sp.), while populations from native sampling sites showed higher abundances of e.g., Firmicutes (Helgoland) and Epsilonproteobacteria (Kiel). Altogether 121 abundant metabolites were putatively annotated in the global ascidian metabolome, of which 18 were only detected in the invasive PEI population (e.g., polyketides and terpenoids), while six (e.g., sphingolipids) or none were exclusive to the native specimens from Helgoland and Kiel, respectively. Some identified bacteria and metabolites reportedly possess bioactive properties (e.g., antifouling and antibiotic) that may contribute to the overall fitness of C. intestinalis. Hence, this first study provides a basis for future studies on factors underlying the global invasiveness of Ciona species.
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Affiliation(s)
- Caroline Utermann
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (M.B.); (L.B.)
| | - Martina Blümel
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (M.B.); (L.B.)
| | - Kathrin Busch
- Research Unit Marine Symbioses, GEOMAR Helmholtz Centre for Ocean Research Kiel, Duesternbrooker Weg 20, 24105 Kiel, Germany; (K.B.); (U.H.)
| | - Larissa Buedenbender
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (M.B.); (L.B.)
| | - Yaping Lin
- Research Group Invasion Ecology, Research Unit Experimental Ecology, GEOMAR Helmholtz Centre for Ocean Research Kiel, Duesternbrooker Weg 20, 24105 Kiel, Germany; (Y.L.); (E.B.)
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Rd., Haidian District, Beijing 100085, China
| | - Bradley A. Haltli
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada; (B.A.H.); (R.G.K.)
| | - Russell G. Kerr
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada; (B.A.H.); (R.G.K.)
| | - Elizabeta Briski
- Research Group Invasion Ecology, Research Unit Experimental Ecology, GEOMAR Helmholtz Centre for Ocean Research Kiel, Duesternbrooker Weg 20, 24105 Kiel, Germany; (Y.L.); (E.B.)
| | - Ute Hentschel
- Research Unit Marine Symbioses, GEOMAR Helmholtz Centre for Ocean Research Kiel, Duesternbrooker Weg 20, 24105 Kiel, Germany; (K.B.); (U.H.)
- Faculty of Mathematics and Natural Sciences, Kiel University, Christian-Albrechts-Platz 4, 24118 Kiel, Germany
| | - Deniz Tasdemir
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (M.B.); (L.B.)
- Faculty of Mathematics and Natural Sciences, Kiel University, Christian-Albrechts-Platz 4, 24118 Kiel, Germany
- Correspondence: ; Tel.: +49-431-6004430
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Chakraborty K, Kizhakkekalam VK, Joy M. Chemical mining of heterotrophic Shewanella algae reveals anti-infective potential of macrocyclic polyketides against multidrug-resistant pathogens. Bioorg Chem 2020; 108:104533. [PMID: 33342567 DOI: 10.1016/j.bioorg.2020.104533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 11/25/2020] [Accepted: 12/03/2020] [Indexed: 11/17/2022]
Abstract
Heterotrophic Gamma-proteobacterium Shewanella algae MTCC 12715, associated with an intertidal red algae Hypnea valentiae, presented broad-spectra of antibacterial activities against pathogenic bacteria bringing about nosocomial infection. Bioassay-guided fractionation of the bacterial crude extract resulted in two undescribed macrocyclic polyketide analogs, with anti-infective activities against methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecalis (MIC 3.1-5.0 µg/mL). In order to identify the polyketide biosynthetic machinery termed type-I polyketide synthase (pks-I) encoding biologically active secondary metabolites in this strain, the ketosynthase-coding regions of DNA with ≈700 bp size, were amplified, and the partial sequence was submitted in the GenBank (accession number MH157093). The titled compounds were classified under macrocyclic polyketides bearing dodecahydropyrano-trioxacyclooctadecine-dione and trioxo-octadecahydro-1H-benzo[o]tetraoxacyclopentacosine-carboxylate functionalities. Structure-activity correlation analysis displayed that hydrophobic descriptor of the studied compounds could play a prominent role in its anti-infective property against the opportunistic pathogens. Further, in silico molecular docking studies were performed in the allosteric sites of penicillin-binding protein (PBP2a) coded by mecA genes of MRSA, and the best binding pose for each compound (docking score -8.47 kcal/mol and -9.58 kcal/mol, respectively) could be correlated with their in vitro antibacterial activities. The pks-I assisted biosynthetic pathway of macrocyclic polyketides through step-wise decarboxylative condensation initiated by malonate-acyl carrier protein corroborated their structural attributes. Chemical mining of the studied macroalgae-associated heterotrophic bacterium thus revealed the promising antagonistic properties of macrocyclic polyketides isolated from Shewanella algae MTCC 12715 against multidrug-resistant pathogens.
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Affiliation(s)
- Kajal Chakraborty
- Marine Bioprospecting Section of Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No. 1603, Cochin, India.
| | - Vinaya Kizhakkepatt Kizhakkekalam
- Marine Bioprospecting Section of Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No. 1603, Cochin, India; Faculty of Marine Sciences, Lakeside Campus, Cochin University of Science and Technology, Cochin, Kerala State, India
| | - Minju Joy
- Marine Bioprospecting Section of Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No. 1603, Cochin, India
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Abdul Malik SA, Bazire A, Gamboa-Muñoz A, Bedoux G, Robledo D, García-Maldonado JQ, Bourgougnon N. Screening of Surface-associated Bacteria from the Mexican Red Alga Halymenia floresii for Quorum Sensing Activity. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720060132] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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31
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The characteristics and algicidal mechanisms of cyanobactericidal bacteria, a review. World J Microbiol Biotechnol 2020; 36:188. [DOI: 10.1007/s11274-020-02965-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 11/16/2020] [Indexed: 10/22/2022]
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32
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Ihua MW, FitzGerald JA, Guihéneuf F, Jackson SA, Claesson MJ, Stengel DB, Dobson ADW. Diversity of bacteria populations associated with different thallus regions of the brown alga Laminaria digitata. PLoS One 2020; 15:e0242675. [PMID: 33237941 PMCID: PMC7688147 DOI: 10.1371/journal.pone.0242675] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 11/08/2020] [Indexed: 12/20/2022] Open
Abstract
Stipitate kelp species such as Laminaria digitata dominate most cold-water subtidal rocky shores and form underwater forests which are among the most productive coastal systems worldwide. Laminaria also sustains rich bacterial communities which offer a variety of biotechnological applications. However, to date, in-depth studies on the diversity and uniqueness of bacterial communities associated with this macroalgal species, their ecological role and their interactions with the alga are under-represented. To address this, the epibacterial populations associated with different thallus regions (holdfast, stipe, meristem, blade) of this brown seaweed were investigated using high-throughput Illumina sequencing of the 16S rRNA genes. The results show that epibacterial communities of the brown seaweed are significantly different and specific to the thallus region, with the shared bacterial population comprising of only 1.1% of the total amplicon sequence variants. The diverse holdfast and blade tissues formed distinct clusters while the meristem and stipe regions are more closely related. The data obtained further supports the hypothesis that macroalgal bacterial communities are shaped by morphological niches and display specificity.
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Affiliation(s)
- Maureen W. Ihua
- School of Microbiology, University College Cork, Cork, Ireland
| | - Jamie A. FitzGerald
- School of Microbiology, University College Cork, Cork, Ireland
- APC Microbiome Institute, University College Cork, Cork, Ireland
| | | | | | - Marcus J. Claesson
- School of Microbiology, University College Cork, Cork, Ireland
- APC Microbiome Institute, University College Cork, Cork, Ireland
| | - Dagmar B. Stengel
- Botany and Plant Science, School of Natural Sciences, Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland
| | - Alan D. W. Dobson
- School of Microbiology, University College Cork, Cork, Ireland
- Environmental Research Institute, University College Cork, Cork, Ireland
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Rizzo C, Lo Giudice A. The Variety and Inscrutability of Polar Environments as a Resource of Biotechnologically Relevant Molecules. Microorganisms 2020; 8:microorganisms8091422. [PMID: 32947905 PMCID: PMC7564310 DOI: 10.3390/microorganisms8091422] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 11/16/2022] Open
Abstract
The application of an ever-increasing number of methodological approaches and tools is positively contributing to the development and yield of bioprospecting procedures. In this context, cold-adapted bacteria from polar environments are becoming more and more intriguing as valuable sources of novel biomolecules, with peculiar properties to be exploited in a number of biotechnological fields. This review aims at highlighting the biotechnological potentialities of bacteria from Arctic and Antarctic habitats, both biotic and abiotic. In addition to cold-enzymes, which have been intensively analysed, relevance is given to recent advances in the search for less investigated biomolecules, such as biosurfactants, exopolysaccharides and antibiotics.
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Affiliation(s)
- Carmen Rizzo
- Stazione Zoologica Anton Dohrn, Department Marine Biotechnology, National Institute of Biology, Villa Pace, Contrada Porticatello 29, 98167 Messina, Italy
- Correspondence:
| | - Angelina Lo Giudice
- Institute of Polar Sciences, National Research Council (CNR-ISP), Spianata San Raineri 86, 98122 Messina, Italy;
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Antimicrobial compounds produced by Lysinibacillus odysseyi epiphytic bacteria associated with red algae. Braz J Microbiol 2020; 51:1683-1690. [PMID: 32696421 DOI: 10.1007/s42770-020-00341-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/16/2020] [Indexed: 01/23/2023] Open
Abstract
Seaweed epiphytic bacteria are highly host specific and their association is little known. The marine environment of Andaman Islands is rich in algal diversity and their association with microbial communities remains unexplored. We investigated the epiphytic bacterial communities from the intertidal red alga Gracilaria canaliculata. A total of four epiphytic bacterial isolates were cultured and screened for antimicrobial activity. Of the four isolates, one potential isolate, Gr102, exhibited strong antimicrobial activity in 0.50 μg/ml concentration against enteropathogenic Escherichia coli, Klebsiella pneumoniae, and Shigella flexneri. This potential isolate was characterized by genomic sequencing, fatty acid methyl ester analysis, and matrix-assisted laser desorption ionization-time of flight spectrometry, and the strain Gr102 was identified as Lysinibacillus odysseyi KC149512. Purified fractions obtained were analyzed by gas chromatography and mass spectrometry. Antimicrobial compounds such as furan, lupenol, diazene, and butenyl methyl ketone were identified. Based on the high level of activity, red algae epiphytic bacteria are potential sources of producing bioactive secondary metabolites.
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Wiese J, Imhoff JF, Horn H, Borchert E, Kyrpides NC, Göker M, Klenk HP, Woyke T, Hentschel U. Genome analysis of the marine bacterium Kiloniella laminariae and first insights into comparative genomics with related Kiloniella species. Arch Microbiol 2020; 202:815-824. [PMID: 31844948 DOI: 10.1007/s00203-019-01791-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/27/2019] [Accepted: 12/03/2019] [Indexed: 10/25/2022]
Abstract
Kiloniella laminariae is a true marine bacterium and the first member of the family and order, the Kiloniellaceae and Kiloniellales. K. laminariae LD81T (= DSM 19542T) was isolated from the marine macroalga Saccharina latissima and is a mesophilic, typical marine chemoheterotrophic aerobic bacterium with antifungal activity. Phylogenetic analysis of 16S rRNA gene sequence revealed the similarity of K. laminariae LD81T not only with three validly described species of the genus Kiloniella, but also with undescribed isolates and clone sequences from marine samples in the range of 93.6-96.7%. We report on the analysis of the draft genome of this alphaproteobacterium and describe some selected features. The 4.4 Mb genome has a G + C content of 51.4%, contains 4213 coding sequences including 51 RNA genes as well as 4162 protein-coding genes, and is a part of the Genomic Encyclopaedia of Bacteria and Archaea (GEBA) project. The genome provides insights into a number of metabolic properties, such as carbon and sulfur metabolism, and indicates the potential for denitrification and the biosynthesis of secondary metabolites. Comparative genome analysis was performed with K. laminariae LD81T and the animal-associated species Kiloniella majae M56.1T from a spider crab, Kiloniella spongiae MEBiC09566T from a sponge as well as Kiloniella litopenai P1-1 from a white shrimp, which all inhabit quite different marine habitats. The analysis revealed that the K. laminariae LD81T contains 1397 unique genes, more than twice the amount of the other species. Unique among others is a mixed PKS/NRPS biosynthetic gene cluster with similarity to the biosynthetic gene cluster responsible for the production of syringomycin.
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Affiliation(s)
- Jutta Wiese
- GEOMAR Helmholtz Centre for Ocean Research Kiel, RD3 Marine Symbioses, Düsternbrooker Weg 20, 24105, Kiel, Germany.
| | - Johannes F Imhoff
- GEOMAR Helmholtz Centre for Ocean Research Kiel, RD3 Marine Symbioses, Düsternbrooker Weg 20, 24105, Kiel, Germany
| | - Hannes Horn
- GEOMAR Helmholtz Centre for Ocean Research Kiel, RD3 Marine Symbioses, Düsternbrooker Weg 20, 24105, Kiel, Germany
| | - Erik Borchert
- GEOMAR Helmholtz Centre for Ocean Research Kiel, RD3 Marine Symbioses, Düsternbrooker Weg 20, 24105, Kiel, Germany
| | - Nikos C Kyrpides
- DOE Joint Genome Institute, 2800 Mitchell Drive, Walnut Creek, CA, 94598, USA
| | - Markus Göker
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124, Braunschweig, Germany
| | - Hans-Peter Klenk
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building 2, Newcastle upon Tyne, NE1 7RU, UK
| | - Tanja Woyke
- DOE Joint Genome Institute, 2800 Mitchell Drive, Walnut Creek, CA, 94598, USA
| | - Ute Hentschel
- GEOMAR Helmholtz Centre for Ocean Research Kiel, RD3 Marine Symbioses, Düsternbrooker Weg 20, 24105, Kiel, Germany
- Christian-Albrechts-University (CAU) of Kiel, Kiel, Germany
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Tavares-Carreón F, De la Torre-Zavala S, Arocha-Garza HF, Souza V, Galán-Wong LJ, Avilés-Arnaut H. In vitro anticancer activity of methanolic extract of Granulocystopsis sp., a microalgae from an oligotrophic oasis in the Chihuahuan desert. PeerJ 2020; 8:e8686. [PMID: 32201642 PMCID: PMC7073244 DOI: 10.7717/peerj.8686] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 02/05/2020] [Indexed: 12/16/2022] Open
Abstract
With the purpose of discovering new anticancer molecules that might have fewer side effects or reduce resistance to current antitumor drugs, a bioprospecting study of the microalgae of the Cuatro Cienegas Basin (CCB), an oasis in the Chihuahuan desert in Mexico was conducted. A microalgae was identified as Granulocystopsis sp. through sequencing the rbcL gene and reconstruction of a phylogenetic tree, and its anticancer activities were assessed using various in vitro assays and different cell lines of human cancers, including lung, skin melanoma, colorectal, breast and prostatic cancers, as well as a normal cell line. The values of IC50 of the microalgae methanolic extract using the MTT assay were lower than 20 μg/ml, except that in the lung cancer line and the normal cell line. In vitro, the microalgae extract caused the loss of membrane integrity, monitored by the trypan blue exclusion test and exhibited marked inhibition of adhesion and cell proliferation in cancer cell lines, through the evaluation of the clonogenic assay. Also, typical nuclear changes of apoptotic processes were observed under the microscope, using the dual acridine orange/ethidium bromide fluorescent staining. Finally, the microalgae extract increased the activity of caspases 3 and 7 in skin melanoma, colon, breast and prostate cancer cells, in the same way as the apoptotic inductor and powerful antitumoral drug, doxorubicin. This study shows the anticancer activity from Granulocystopsis sp., a microalgae isolated from the CCB.
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Affiliation(s)
- Faviola Tavares-Carreón
- Facultad de Ciencias Biológicas, Instituto de Biotecnología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, Mexico
| | - Susana De la Torre-Zavala
- Facultad de Ciencias Biológicas, Instituto de Biotecnología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, Mexico
| | - Hector Fernando Arocha-Garza
- Facultad de Ciencias Biológicas, Instituto de Biotecnología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, Mexico
| | - Valeria Souza
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Coyoacán, Mexico
| | - Luis J Galán-Wong
- Facultad de Ciencias Biológicas, Instituto de Biotecnología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, Mexico
| | - Hamlet Avilés-Arnaut
- Facultad de Ciencias Biológicas, Instituto de Biotecnología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, Mexico
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Draft Genome Sequence of Pseudomonas sp. Strain LD120, Isolated from the Marine Alga Saccharina latissima. Microbiol Resour Announc 2020; 9:9/8/e01305-19. [PMID: 32079630 PMCID: PMC7033267 DOI: 10.1128/mra.01305-19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report the draft genome sequence of Pseudomonas sp. strain LD120, which was isolated from a brown macroalga in the Baltic Sea. The genome of this marine Pseudomonas protegens subgroup bacterium harbors biosynthetic gene clusters for toxic metabolites typically produced by members of this Pseudomonas subgroup, including 2,4-diacetylphloroglucinol, pyoluteorin, and rhizoxin analogs. We report the draft genome sequence of Pseudomonas sp. strain LD120, which was isolated from a brown macroalga in the Baltic Sea. The genome of this marine Pseudomonas protegens subgroup bacterium harbors biosynthetic gene clusters for toxic metabolites typically produced by members of this Pseudomonas subgroup, including 2,4-diacetylphloroglucinol, pyoluteorin, and rhizoxin analogs.
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38
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Marine macroalgae-associated heterotrophic Firmicutes and Gamma-proteobacteria: prospective anti-infective agents against multidrug resistant pathogens. Arch Microbiol 2020; 202:905-920. [DOI: 10.1007/s00203-019-01800-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 07/29/2019] [Accepted: 12/16/2019] [Indexed: 10/25/2022]
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39
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Karimi E, Geslain E, KleinJan H, Tanguy G, Legeay E, Corre E, Dittami SM. Genome Sequences of 72 Bacterial Strains Isolated from Ectocarpus subulatus: A Resource for Algal Microbiology. Genome Biol Evol 2020; 12:3647-3655. [PMID: 31841132 PMCID: PMC6948157 DOI: 10.1093/gbe/evz278] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2019] [Indexed: 12/25/2022] Open
Abstract
Brown algae are important primary producers and ecosystem engineers in the ocean, and Ectocarpus has been established as a laboratory model for this lineage. Like most multicellular organisms, Ectocarpus is associated with a community of microorganisms, a partnership frequently referred to as holobiont due to the tight interconnections between the components. Although genomic resources for the algal host are well established, its associated microbiome is poorly characterized from a genomic point of view, limiting the possibilities of using these types of data to study host-microbe interactions. To address this gap in knowledge, we present the annotated draft genome sequences of seventy-two cultivable Ectocarpus-associated bacteria. A screening of gene clusters related to the production of secondary metabolites revealed terpene, bacteriocin, NRPS, PKS-t3, siderophore, PKS-t1, and homoserine lactone clusters to be abundant among the sequenced genomes. These compounds may be used by the bacteria to communicate with the host and other microbes. Moreover, detoxification and provision of vitamin B pathways have been observed in most sequenced genomes, highlighting potential contributions of the bacterial metabolism toward host fitness and survival. The genomes sequenced in this study form a valuable resource for comparative genomic analyses and evolutionary surveys of alga-associated bacteria. They help establish Ectocarpus as a model for brown algal holobionts and will enable the research community to produce testable hypotheses about the molecular interactions within this complex system.
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Affiliation(s)
- Elham Karimi
- Sorbonne Université/CNRS, Station Biologique de Roscoff, UMR 8227, Integrative Biology of Marine Models, Roscoff, France
| | - Enora Geslain
- Sorbonne Université/CNRS, Station Biologique de Roscoff, UMR 8227, Integrative Biology of Marine Models, Roscoff, France
- Sorbonne Université/CNRS, Station Biologique de Roscoff, FR2424, Roscoff, France Roscoff, France
| | - Hetty KleinJan
- Sorbonne Université/CNRS, Station Biologique de Roscoff, UMR 8227, Integrative Biology of Marine Models, Roscoff, France
- CEBEDEAU, Research and Expertise Center for Water, Liège, Belgium
| | - Gwenn Tanguy
- Sorbonne Université/CNRS, Station Biologique de Roscoff, FR2424, Roscoff, France Roscoff, France
| | - Erwan Legeay
- Sorbonne Université/CNRS, Station Biologique de Roscoff, FR2424, Roscoff, France Roscoff, France
| | - Erwan Corre
- Sorbonne Université/CNRS, Station Biologique de Roscoff, FR2424, Roscoff, France Roscoff, France
| | - Simon M Dittami
- Sorbonne Université/CNRS, Station Biologique de Roscoff, UMR 8227, Integrative Biology of Marine Models, Roscoff, France
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40
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Antibacterial and antioxidant aryl-enclosed macrocyclic polyketide from intertidal macroalgae associated heterotrophic bacterium Shewanella algae. Med Chem Res 2019. [DOI: 10.1007/s00044-019-02468-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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41
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Le Pennec G, Gall EA. The microbiome of Codium tomentosum: original state and in the presence of copper. World J Microbiol Biotechnol 2019; 35:167. [DOI: 10.1007/s11274-019-2740-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 10/03/2019] [Indexed: 01/24/2023]
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42
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Tourneroche A, Lami R, Hubas C, Blanchet E, Vallet M, Escoubeyrou K, Paris A, Prado S. Bacterial-Fungal Interactions in the Kelp Endomicrobiota Drive Autoinducer-2 Quorum Sensing. Front Microbiol 2019; 10:1693. [PMID: 31417510 PMCID: PMC6685064 DOI: 10.3389/fmicb.2019.01693] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 07/09/2019] [Indexed: 12/20/2022] Open
Abstract
Brown macroalgae are an essential component of temperate coastal ecosystems and a growing economic sector. They harbor diverse microbial communities that regulate algal development and health. This algal holobiont is dynamic and achieves equilibrium via a complex network of microbial and host interactions. We now report that bacterial and fungal endophytes associated with four brown algae (Ascophyllum nodosum, Pelvetia canaliculata, Laminaria digitata, and Saccharina latissima) produce metabolites that interfere with bacterial autoinducer-2 quorum sensing, a signaling system implicated in virulence and host colonization. Additionally, we performed co-culture experiments combined to a metabolomic approach and demonstrated that microbial interactions influence production of metabolites, including metabolites involved in quorum sensing. Collectively, the data highlight autoinducer-2 quorum sensing as a key metabolite in the complex network of interactions within the algal holobiont.
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Affiliation(s)
- Anne Tourneroche
- Unité Molécules de Communication et Adaptation des Microorganismes (MCAM), Muséum National d'Histoire Naturelle (MNHN), Centre National de la Recherche Scientifique (CNRS), CP 54, Paris, France
| | - Raphaël Lami
- CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM), USR3579, Observatoire Océanologique de Banyuls, Sorbonne Université, Banyuls-sur-Mer, France
| | - Cédric Hubas
- Muséum National d'Histoire Naturelle, UMR BOREA 7208 MNHN-Sorbonne Université-CNRS-UCN-UA-IRD, Station Marine de Concarneau, Paris, France
| | - Elodie Blanchet
- CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM), USR3579, Observatoire Océanologique de Banyuls, Sorbonne Université, Banyuls-sur-Mer, France
| | - Marine Vallet
- Unité Molécules de Communication et Adaptation des Microorganismes (MCAM), Muséum National d'Histoire Naturelle (MNHN), Centre National de la Recherche Scientifique (CNRS), CP 54, Paris, France
| | - Karine Escoubeyrou
- CNRS, Observatoire Océanologique de Banyuls, Sorbonne Université, FR3724, Banyuls-sur-Mer, France
| | - Alain Paris
- Unité Molécules de Communication et Adaptation des Microorganismes (MCAM), Muséum National d'Histoire Naturelle (MNHN), Centre National de la Recherche Scientifique (CNRS), CP 54, Paris, France
| | - Soizic Prado
- Unité Molécules de Communication et Adaptation des Microorganismes (MCAM), Muséum National d'Histoire Naturelle (MNHN), Centre National de la Recherche Scientifique (CNRS), CP 54, Paris, France
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43
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The Macroalgal Holobiont in a Changing Sea. Trends Microbiol 2019; 27:635-650. [DOI: 10.1016/j.tim.2019.03.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 03/01/2019] [Accepted: 03/12/2019] [Indexed: 02/06/2023]
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Al-Wahaibi ASM, Lapinska E, Rajarajan N, Dobretsov S, Upstill-Goddard R, Burgess JG. Secretion of DNases by Marine Bacteria: A Culture Based and Bioinformatics Approach. Front Microbiol 2019; 10:969. [PMID: 31134017 PMCID: PMC6514286 DOI: 10.3389/fmicb.2019.00969] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 04/16/2019] [Indexed: 01/23/2023] Open
Abstract
The vast majority of bacteria present in the natural environment are present in the form of aggregates and/or biofilms. Microbial aggregates are ubiquitous in the marine environment and are inhabited by diverse microbial communities which often express intense extracellular enzymatic activities. However, the secretion of an important group of enzymes, DNases, by bacteria from marine aggregates has not been studied, despite the importance of these aggregates in biogeochemical cycling of nutrients in the oceans. In this work, we therefore, employed both culture-based and bioinformatics approaches to understand the diversity of bacterial DNases in marine bacterioplankton. We found that 34% of 345 strains of attached and non-attached marine bacteria showed extracellular DNase activity. Most of these isolates belong to Proteobacteria (53%) and Firmicutes (34%). Secretion of DNases by bacteria isolated from marine gel particles (MGP) is reported here for the first time. Then, to further understand the wider diversity of the potential to produce DNases, sequences were compared using 2316 whole genome and 42 metagenome datasets. Thirty-nine different taxonomic groups corresponding to 10 bacterial phyla were found to encode genes responsible for DNase secretion. This study highlights the unexpected and widespread presence of DNase secretion in bacteria in general and in MGP more specifically. This has important implications for understanding the dynamics and fate of marine microbial aggregates in the oceans.
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Affiliation(s)
- Aisha S. M. Al-Wahaibi
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
- Centre of Excellence in Marine Biotechnology, Sultan Qaboos University, Al Khoud, Oman
| | - Emilia Lapinska
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Nithyalakshmy Rajarajan
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Sergey Dobretsov
- Centre of Excellence in Marine Biotechnology, Sultan Qaboos University, Al Khoud, Oman
- Department of Marine Science and Fisheries, Sultan Qaboos University, Al Khoud, Oman
| | - Robert Upstill-Goddard
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - J. Grant Burgess
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
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Suvega T, Arunkumar K. Probiotic bacteria promote the growth of associating host(red seaweed, Gracilaria edulis) also synthesize antibacterial protein. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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46
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Girão M, Ribeiro I, Ribeiro T, Azevedo IC, Pereira F, Urbatzka R, Leão PN, Carvalho MF. Actinobacteria Isolated From Laminaria ochroleuca: A Source of New Bioactive Compounds. Front Microbiol 2019; 10:683. [PMID: 31024480 PMCID: PMC6465344 DOI: 10.3389/fmicb.2019.00683] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 03/19/2019] [Indexed: 01/04/2023] Open
Abstract
Nature is the major reservoir of biologically active molecules. The urgent need of finding novel molecules for pharmaceutical application is prompting the research of underexplored environments, such as marine ecosystems. Here, we investigated cultivable actinobacteria associated with the macroalgae Laminaria ochroleuca and assessed their potential to produce compounds with antimicrobial or anticancer activities. A specimen of L. ochroleuca was collected in a rocky shore in northern Portugal, and fragments of tissues from different parts of the macroalgae (holdfast, stipe, and blades) were surface sterilized and plated in three culture media selective for actinobacteria. A total of 90 actinobacterial strains were isolated, most of which affiliated with the genus Streptomyces. Isolates associated with the genera Isoptericola, Rhodococcus, Nonomuraeae, Nocardiopsis, Microbispora, and Microbacterium were also obtained. Organic extracts from the isolates were tested for their antimicrobial activity using the agar-based disk diffusion method, followed by determination of minimum inhibitory concentration (MIC) values. Forty-five isolates inhibited the growth of Candida albicans and/or Staphylococcus aureus, with MIC values ranging from <0.5 to 1000 μg mL−1. The actinobacterial isolates were also tested for their anticancer potential on two human cancer cell lines. Twenty-eight extracts affected the viability of at least one human cancer cell line (breast carcinoma T-47D and neuroblastoma SH-SY5Y) and non-carcinogenic endothelial cell line (hCMEC/D3). Seven extracts affected the viability of cancer cells only. This study revealed that L. ochroleuca is a rich source of actinobacteria with promising antimicrobial and anticancer activities and suggests that macroalgae may be a valuable source of actinobacteria and, consequently, of new molecules with biotechnological importance.
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Affiliation(s)
- Mariana Girão
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal.,Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Inês Ribeiro
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Tiago Ribeiro
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Isabel C Azevedo
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Filipe Pereira
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Ralph Urbatzka
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Maria F Carvalho
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
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47
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Braña AF, Sarmiento-Vizcaíno A, Pérez-Victoria I, Martín J, Otero L, Palacios-Gutiérrez JJ, Fernández J, Mohamedi Y, Fontanil T, Salmón M, Cal S, Reyes F, García LA, Blanco G. Desertomycin G, a New Antibiotic with Activity against Mycobacterium tuberculosis and Human Breast Tumor Cell Lines Produced by Streptomyces althioticus MSM3, Isolated from the Cantabrian Sea Intertidal Macroalgae Ulva sp. Mar Drugs 2019; 17:md17020114. [PMID: 30759848 PMCID: PMC6409695 DOI: 10.3390/md17020114] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 01/31/2019] [Accepted: 02/07/2019] [Indexed: 12/18/2022] Open
Abstract
The isolation and structural elucidation of a structurally new desertomycin, designated as desertomycin G (1), with strong antibiotic activity against several clinically relevant antibiotic resistant pathogens are described herein. This new natural product was obtained from cultures of the marine actinomycete Streptomyces althioticus MSM3, isolated from samples of the intertidal seaweed Ulva sp. collected in the Cantabrian Sea (Northeast Atlantic Ocean). Particularly interesting is its strong antibiotic activity against Mycobacterium tuberculosis clinical isolates, resistant to antibiotics in clinical use. To the best of our knowledge, this is the first report on a member of the desertomycin family displaying such activity. Additionally, desertomycin G shows strong antibiotic activities against other relevant Gram-positive clinical pathogens such as Corynebacterium urealyticum, Staphylococcus aureus, Streptococcus pneumoniae, Streptococcus pyogenes, Enterococcus faecium, Enterococcus faecalis, and Clostridium perfringens. Desertomycin G also displays moderate antibiotic activity against relevant Gram-negative clinical pathogens such as Bacteroides fragilis, Haemophilus influenzae and Neisseria meningitidis. In addition, the compound affects viability of tumor cell lines, such as human breast adenocarcinoma (MCF-7) and colon carcinoma (DLD-1), but not normal mammary fibroblasts.
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Affiliation(s)
- Alfredo F Braña
- Departamento de Biología Funcional, Área de Microbiología, e Instituto Universitario de Oncología del Principado de Asturias. Universidad de Oviedo, 33006 Oviedo, Spain.
| | - Aida Sarmiento-Vizcaíno
- Departamento de Biología Funcional, Área de Microbiología, e Instituto Universitario de Oncología del Principado de Asturias. Universidad de Oviedo, 33006 Oviedo, Spain.
| | - Ignacio Pérez-Victoria
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores Andalucía, Avda. del Conocimiento 34, Parque Tecnológico de Ciencias de la Salud, E-18016, Granada, Spain.
| | - Jesús Martín
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores Andalucía, Avda. del Conocimiento 34, Parque Tecnológico de Ciencias de la Salud, E-18016, Granada, Spain.
| | - Luis Otero
- Servicio de Microbiología. Hospital de Cabueñes, 33203 Gijón, Spain.
| | | | - Jonathan Fernández
- Servicio de Microbiología. Hospital Universitario Central de Asturias, 33011 Oviedo, Spain.
| | - Yamina Mohamedi
- Departamento de Bioquímica y Biología Molecular, e Instituto Universitario de Oncología del Principado de Asturias. Universidad de Oviedo, 33006 Oviedo, Spain.
| | - Tania Fontanil
- Departamento de Bioquímica y Biología Molecular, e Instituto Universitario de Oncología del Principado de Asturias. Universidad de Oviedo, 33006 Oviedo, Spain.
| | - Marina Salmón
- Departamento de Biología Funcional, Área de Microbiología, e Instituto Universitario de Oncología del Principado de Asturias. Universidad de Oviedo, 33006 Oviedo, Spain.
| | - Santiago Cal
- Departamento de Bioquímica y Biología Molecular, e Instituto Universitario de Oncología del Principado de Asturias. Universidad de Oviedo, 33006 Oviedo, Spain.
| | - Fernando Reyes
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores Andalucía, Avda. del Conocimiento 34, Parque Tecnológico de Ciencias de la Salud, E-18016, Granada, Spain.
| | - Luis A García
- Departamento de Ingeniería Química y Tecnología del Medio Ambiente. Área de Ingeniería Química, Universidad de Oviedo, 33006 Oviedo, Spain.
| | - Gloria Blanco
- Departamento de Biología Funcional, Área de Microbiología, e Instituto Universitario de Oncología del Principado de Asturias. Universidad de Oviedo, 33006 Oviedo, Spain.
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48
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Serebryakova A, Aires T, Viard F, Serrão EA, Engelen AH. Summer shifts of bacterial communities associated with the invasive brown seaweed Sargassum muticum are location and tissue dependent. PLoS One 2018; 13:e0206734. [PMID: 30517113 PMCID: PMC6281184 DOI: 10.1371/journal.pone.0206734] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 10/18/2018] [Indexed: 02/05/2023] Open
Abstract
Seaweed-associated microbiota experience spatial and temporal shifts in response to changing environmental conditions and seaweed physiology. These shifts may result in structural, functional and behavioral changes in the host with potential consequences for its fitness. They, thus, may help the host to adapt to changing environmental conditions. The current knowledge of seasonal variation of seaweed-associated microbiota is however still limited. In this study, we explored temporal and spatial variation of microbial communities associated with the invasive brown seaweed S. muticum. We sampled in northern and southern Portugal, in September, March and July-August (summer). In addition, as (pseudo-)perennial seaweeds display seasonal reproductive phenology, we sampled various parts of the individuals to disentangle the effect of temporal changes from those due to structural development variations. The diversity and structure of associated microbial communities were determined using next generation sequencing of the variable regions V5-7 of the 16S rDNA. We expected to find differentiation in associated microbial communities between regions and sampling months, but with differences depending on the seaweed structure examined. As expected, the study revealed substantial temporal shifts in S. muticum microbiome, for instance with large abundance of Rhodobacteraceae and Loktanella in September-March but prevalence of Pirellulales during the summer months. Variations between regions and tissues were also observed: in northern Portugal and on basal structures, bacterial diversity was higher as compared to the South and apical parts. All examined seaweed structures showed temporal differences in associated microbial community structure over time, except for holdfasts between September and March. Bacteria contributing to these changes varied spatially. Conversely to all other structures, the holdfast also did not show differences in associated community structure between southern and northern regions. Our study highlights the importance of structural microscale differentiations within seaweeds hosts with regard to their associated microbial communities and their importance across temporal and spatial dimensions.
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Affiliation(s)
- Alexandra Serebryakova
- Center for Marine Sciences (CCMAR), F.C.T. University of Algarve, Faro, Portugal
- Sorbonne Université, CNRS, UMR 7144 AD2M, Station Biologique de Roscoff, UPMC Univ Paris, Roscoff, France
| | - Tania Aires
- Center for Marine Sciences (CCMAR), F.C.T. University of Algarve, Faro, Portugal
| | - Frédérique Viard
- Sorbonne Université, CNRS, UMR 7144 AD2M, Station Biologique de Roscoff, UPMC Univ Paris, Roscoff, France
| | - Ester A. Serrão
- Center for Marine Sciences (CCMAR), F.C.T. University of Algarve, Faro, Portugal
| | - Aschwin H. Engelen
- Center for Marine Sciences (CCMAR), F.C.T. University of Algarve, Faro, Portugal
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49
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Pharmacological properties of marine macroalgae-associated heterotrophic bacteria. Arch Microbiol 2018; 201:505-518. [DOI: 10.1007/s00203-018-1592-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 08/28/2018] [Accepted: 10/28/2018] [Indexed: 11/25/2022]
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50
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Wiese J, Imhoff JF. Marine bacteria and fungi as promising source for new antibiotics. Drug Dev Res 2018; 80:24-27. [PMID: 30370576 DOI: 10.1002/ddr.21482] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 09/11/2018] [Accepted: 09/28/2018] [Indexed: 01/10/2023]
Abstract
Natural products and derivatives thereof are of considerable importance in the discovery of new pharmaceuticals, for example, for the treatment of cancer, diabetes, inflammation diseases, and infection diseases caused by bacteria, fungi, viruses, or parasites. The great biodiversity of marine microorganisms is reflected in their huge chemical diversity, which provides a rich source of biologically active compounds. An increasing interest in marine microorganisms as promising producers of new compounds with potential medical applications has raised increasing interest in the sustainable exploration of marine microbial resources for the discovery of new antibiotics, which is highlighted. The bottlenecks in the development of drugs using the large marine natural product pipeline are also discussed.
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Affiliation(s)
- Jutta Wiese
- RD3 - Marine Ecology, RU - Marine Microbiology, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | - Johannes F Imhoff
- RD3 - Marine Ecology, RU - Marine Microbiology, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
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