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Chiou YJ, Chan YF, Yu SP, Lu CY, Hsiao SSY, Chiang PW, Hsu TC, Liu PY, Wada N, Lee Y, Jane WN, Lee DC, Huang YW, Tang SL. Similar but different: Characterization of dddD gene-mediated DMSP metabolism among coral-associated Endozoicomonas. SCIENCE ADVANCES 2023; 9:eadk1910. [PMID: 37992165 PMCID: PMC10664990 DOI: 10.1126/sciadv.adk1910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 10/20/2023] [Indexed: 11/24/2023]
Abstract
Endozoicomonas are often predominant bacteria and prominently important in coral health. Their role in dimethylsulfoniopropionate (DMSP) degradation has been a subject of discussion for over a decade. A previous study found that Endozoicomonas degraded DMSP through the dddD pathway. This process releases dimethyl sulfide, which is vital for corals coping with thermal stress. However, little is known about the related gene regulation and metabolic abilities of DMSP metabolism in Endozoicomonadaceae. In this study, we isolated a novel Endozoicomonas DMSP degrader and observed a distinct DMSP metabolic trend in two phylogenetically close dddD-harboring Endozoicomonas species, confirmed genetically by comparative transcriptomic profiling and visualization of the change of DMSP stable isotopes in bacterial cells using nanoscale secondary ion spectrometry. Furthermore, we found that DMSP cleavage enzymes are ubiquitous in coral Endozoicomonas with a preference for having DddD lyase. We speculate that harboring DMSP degrading genes enables Endozoicomonas to successfully colonize various coral species across the globe.
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Affiliation(s)
- Yu-Jing Chiou
- Institute of Oceanography, National Taiwan University, Taipei 106, Taiwan
- Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Ya-Fan Chan
- Department of Microbiology, Soochow University, Taipei 111, Taiwan
| | - Sheng-Ping Yu
- Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Chih-Ying Lu
- Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, National Chung Hsing University and Academia Sinica, Taipei 115, Taiwan
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 402, Taiwan
| | | | - Pei-Wen Chiang
- Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Ting-Chang Hsu
- Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Po-Yu Liu
- School of Medicine, College of Medicine, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Naohisa Wada
- Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Yu Lee
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Wann-Neng Jane
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 115, Taiwan
| | - Der-Chuen Lee
- Institute of Astronomy and Astrophysics, Academia Sinica, Taipei 115, Taiwan
| | - Yu-Wen Huang
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Sen-Lin Tang
- Institute of Oceanography, National Taiwan University, Taipei 106, Taiwan
- Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
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2
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Lima LFO, Alker AT, Papudeshi B, Morris MM, Edwards RA, de Putron SJ, Dinsdale EA. Coral and Seawater Metagenomes Reveal Key Microbial Functions to Coral Health and Ecosystem Functioning Shaped at Reef Scale. MICROBIAL ECOLOGY 2022:10.1007/s00248-022-02094-6. [PMID: 35965269 DOI: 10.1007/s00248-022-02094-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 07/29/2022] [Indexed: 06/15/2023]
Abstract
The coral holobiont is comprised of a highly diverse microbial community that provides key services to corals such as protection against pathogens and nutrient cycling. The coral surface mucus layer (SML) microbiome is very sensitive to external changes, as it constitutes the direct interface between the coral host and the environment. Here, we investigate whether the bacterial taxonomic and functional profiles in the coral SML are shaped by the local reef zone and explore their role in coral health and ecosystem functioning. The analysis was conducted using metagenomes and metagenome-assembled genomes (MAGs) associated with the coral Pseudodiploria strigosa and the water column from two naturally distinct reef environments in Bermuda: inner patch reefs exposed to a fluctuating thermal regime and the more stable outer reefs. The microbial community structure in the coral SML varied according to the local environment, both at taxonomic and functional levels. The coral SML microbiome from inner reefs provides more gene functions that are involved in nutrient cycling (e.g., photosynthesis, phosphorus metabolism, sulfur assimilation) and those that are related to higher levels of microbial activity, competition, and stress response. In contrast, the coral SML microbiome from outer reefs contained genes indicative of a carbohydrate-rich mucus composition found in corals exposed to less stressful temperatures and showed high proportions of microbial gene functions that play a potential role in coral disease, such as degradation of lignin-derived compounds and sulfur oxidation. The fluctuating environment in the inner patch reefs of Bermuda could be driving a more beneficial coral SML microbiome, potentially increasing holobiont resilience to environmental changes and disease.
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Affiliation(s)
- Laís F O Lima
- Department of Biology, San Diego State University, San Diego, CA, USA
- College of Biological Sciences, University of California Davis, Davis, CA, USA
| | - Amanda T Alker
- Department of Biology, San Diego State University, San Diego, CA, USA
| | - Bhavya Papudeshi
- College of Science and Engineering, Flinders University, Adelaide, South Australia, Australia
| | - Megan M Morris
- Lawrence Livermore National Laboratory, Livermore, CA, USA
| | - Robert A Edwards
- Department of Biology, San Diego State University, San Diego, CA, USA
- College of Science and Engineering, Flinders University, Adelaide, South Australia, Australia
| | | | - Elizabeth A Dinsdale
- Department of Biology, San Diego State University, San Diego, CA, USA.
- College of Science and Engineering, Flinders University, Adelaide, South Australia, Australia.
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3
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Broad scale proteomic analysis of heat-destabilised symbiosis in the hard coral Acropora millepora. Sci Rep 2021; 11:19061. [PMID: 34561509 PMCID: PMC8463592 DOI: 10.1038/s41598-021-98548-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 09/07/2021] [Indexed: 02/07/2023] Open
Abstract
Coral reefs across the globe are threatened by warming oceans. The last few years have seen the worst mass coral bleaching events recorded, with more than one quarter of all reefs irreversibly impacted. Considering the widespread devastation, we need to increase our efforts to understanding the physiological and metabolic shifts underlying the breakdown of this important symbiotic ecosystem. Here, we investigated the proteome (PRIDE accession # PXD011668) of both host and symbionts of the reef-building coral Acropora millepora exposed to ambient (~ 28 °C) and elevated temperature (~ 32 °C for 2 days, following a five-day incremental increase) and explored associated biomolecular changes in the symbiont, with the aim of gaining new insights into the mechanisms underpinning the collapse of the coral symbiosis. We identified 1,230 unique proteins (774 host and 456 symbiont) in the control and thermally stressed corals, of which 107 significantly increased and 125 decreased in abundance under elevated temperature relative to the control. Proteins involved in oxidative stress and proteolysis constituted 29% of the host proteins that increased in abundance, with evidence of impairment to endoplasmic reticulum and cytoskeletal regulation proteins. In the symbiont, we detected a decrease in proteins responsible for photosynthesis and energy production (33% of proteins decreased in abundance), yet minimal signs of oxidative stress or proteolysis. Lipid stores increased > twofold despite reduction in photosynthesis, suggesting reduced translocation of carbon to the host. There were significant changes in proteins related to symbiotic state, including proteins linked to nitrogen metabolism in the host and the V-ATPase (-0.6 fold change) known to control symbiosome acidity. These results highlight key differences in host and symbiont proteomic adjustments under elevated temperature and identify two key proteins directly involved in bilateral nutrient exchange as potential indicators of symbiosis breakdown.
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4
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Shinzato C, Khalturin K, Inoue J, Zayasu Y, Kanda M, Kawamitsu M, Yoshioka Y, Yamashita H, Suzuki G, Satoh N. Eighteen Coral Genomes Reveal the Evolutionary Origin of Acropora Strategies to Accommodate Environmental Changes. Mol Biol Evol 2021; 38:16-30. [PMID: 32877528 PMCID: PMC7783167 DOI: 10.1093/molbev/msaa216] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The genus Acropora comprises the most diverse and abundant scleractinian corals (Anthozoa, Cnidaria) in coral reefs, the most diverse marine ecosystems on Earth. However, the genetic basis for the success and wide distribution of Acropora are unknown. Here, we sequenced complete genomes of 15 Acropora species and 3 other acroporid taxa belonging to the genera Montipora and Astreopora to examine genomic novelties that explain their evolutionary success. We successfully obtained reasonable draft genomes of all 18 species. Molecular dating indicates that the Acropora ancestor survived warm periods without sea ice from the mid or late Cretaceous to the Early Eocene and that diversification of Acropora may have been enhanced by subsequent cooling periods. In general, the scleractinian gene repertoire is highly conserved; however, coral- or cnidarian-specific possible stress response genes are tandemly duplicated in Acropora. Enzymes that cleave dimethlysulfonioproprionate into dimethyl sulfide, which promotes cloud formation and combats greenhouse gasses, are the most duplicated genes in the Acropora ancestor. These may have been acquired by horizontal gene transfer from algal symbionts belonging to the family Symbiodiniaceae, or from coccolithophores, suggesting that although functions of this enzyme in Acropora are unclear, Acropora may have survived warmer marine environments in the past by enhancing cloud formation. In addition, possible antimicrobial peptides and symbiosis-related genes are under positive selection in Acropora, perhaps enabling adaptation to diverse environments. Our results suggest unique Acropora adaptations to ancient, warm marine environments and provide insights into its capacity to adjust to rising seawater temperatures.
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Affiliation(s)
- Chuya Shinzato
- Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan
| | - Konstantin Khalturin
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Jun Inoue
- Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan.,Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Yuna Zayasu
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Miyuki Kanda
- DNA Sequence Section (SQC), Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Mayumi Kawamitsu
- DNA Sequence Section (SQC), Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Yuki Yoshioka
- Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan.,Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Hiroshi Yamashita
- Research Center for Subtropical Fisheries, Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Okinawa, Japan
| | - Go Suzuki
- Research Center for Subtropical Fisheries, Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Okinawa, Japan
| | - Noriyuki Satoh
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
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5
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Jackson RL, Gabric AJ, Cropp R. Coral reefs as a source of climate-active aerosols. PeerJ 2020; 8:e10023. [PMID: 33062438 PMCID: PMC7531332 DOI: 10.7717/peerj.10023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 09/02/2020] [Indexed: 01/17/2023] Open
Abstract
We review the evidence for bio-regulation by coral reefs of local climate through stress-induced emissions of aerosol precursors, such as dimethylsulfide. This is an issue that goes to the core of the coral ecosystem’s ability to maintain homeostasis in the face of increasing climate change impacts and other anthropogenic pressures. We examine this through an analysis of data on aerosol emissions by corals of the Great Barrier Reef, Australia. We focus on the relationship with local stressors, such as surface irradiance levels and sea surface temperature, both before and after notable coral bleaching events. We conclude that coral reefs may be able to regulate their exposure to environmental stressors through modification of the optical properties of the atmosphere, however this ability may be impaired as climate change intensifies.
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Affiliation(s)
- Rebecca L Jackson
- School of Environment and Science, Griffith University, Gold Coast, QLD, Australia
| | - Albert J Gabric
- School of Environment and Science, Griffith University, Nathan, QLD, Australia
| | - Roger Cropp
- School of Environment and Science, Griffith University, Gold Coast, QLD, Australia
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6
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Dixon G, Abbott E, Matz M. Meta-analysis of the coral environmental stress response: Acropora corals show opposing responses depending on stress intensity. Mol Ecol 2020; 29:2855-2870. [PMID: 32615003 DOI: 10.1111/mec.15535] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 05/25/2020] [Accepted: 06/18/2020] [Indexed: 12/15/2022]
Abstract
As climate change progresses, reef-building corals must contend more often with suboptimal conditions, motivating a need to understand coral stress response. Here, we test the hypothesis that there is a stereotyped transcriptional response that corals enact under all stressful conditions, functionally characterized by downregulation of growth, and activation of cell death, response to reactive oxygen species, immunity, and protein folding and degradation. We analyse RNA-seq and Tag-Seq data from 14 previously published studies and supplement them with four new experiments involving different stressors, totaling over 600 gene expression profiles from the genus Acropora. Contrary to expectations, we found not one, but two distinct types of response. The type A response was observed under all kinds of high-intensity stress, was correlated between independent projects and was functionally consistent with the hypothesized stereotyped response. The consistent correlation between projects, irrespective of stress type, supports the type A response as the general coral environmental stress response (ESR), a blanket solution to severely stressful conditions. The distinct type B response was observed under lower intensity stress and was more variable among studies. Unexpectedly, at the level of individual genes and functional categories, the type B response was broadly opposite the type A response. Finally, taking advantage of the breadth of the data set, we present contextual annotations for previously unannotated genes based on consistent stress-induced differences across independent projects.
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Affiliation(s)
- Groves Dixon
- Department of Integrative Biology, University of Texas, Austin, TX, USA
| | - Evelyn Abbott
- Department of Integrative Biology, University of Texas, Austin, TX, USA
| | - Mikhail Matz
- Department of Integrative Biology, University of Texas, Austin, TX, USA
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7
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Guibert I, Bourdreux F, Bonnard I, Pochon X, Dubousquet V, Raharivelomanana P, Berteaux-Lecellier V, Lecellier G. Dimethylsulfoniopropionate concentration in coral reef invertebrates varies according to species assemblages. Sci Rep 2020; 10:9922. [PMID: 32555283 PMCID: PMC7303174 DOI: 10.1038/s41598-020-66290-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 05/18/2020] [Indexed: 11/28/2022] Open
Abstract
Dimethylsulfoniopropionate (DMSP) is a key compound in the marine sulfur cycle, and is produced in large quantities in coral reefs. In addition to Symbiodiniaceae, corals and associated bacteria have recently been shown to play a role in DMSP metabolism. Numerous ecological studies have focused on DMSP concentrations in corals, which led to the hypothesis that increases in DMSP levels might be a general response to stress. Here we used multiple species assemblages of three common Indo-Pacific holobionts, the scleractinian corals Pocillopora damicornis and Acropora cytherea, and the giant clam Tridacna maxima and examined the DMSP concentrations associated with each species within different assemblages and thermal conditions. Results showed that the concentration of DMSP in A. cytherea and T. maxima is modulated according to the complexity of species assemblages. To determine the potential importance of symbiotic dinoflagellates in DMSP production, we then explored the relative abundance of Symbiodiniaceae clades in relation to DMSP levels using metabarcoding, and found no significant correlation between these factors. Finally, this study also revealed the existence of homologs involved in DMSP production in giant clams, suggesting for the first time that, like corals, they may also contribute to DMSP production. Taken together, our results demonstrated that corals and giant clams play important roles in the sulfur cycle. Because DMSP production varies in response to specific species-environment interactions, this study offers new perspectives for future global sulfur cycling research.
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Affiliation(s)
- Isis Guibert
- Swire Institute of Marine Science, The University of Hong Kong, Hong Kong S.A.R, China.
- Sorbonne Université, UMR250/9220 ENTROPIE IRD-CNRS-UR-IFREMER-UNC, Promenade Roger-Laroque, Noumea cedex, New Caledonia, France.
- USR3278 PSL CRIOBE CNRS-EPHE-UPVD, LabEx CORAIL, Papetoai, Moorea, French Polynesia.
| | - Flavien Bourdreux
- Université de Paris-Saclay, UVSQ, 45 avenue des Etats-Unis, Versailles Cedex, France
- Institut Lavoisier de Versailles, UMR CNRS 8180, 45 avenue des Etats-Unis, Versailles Cedex, France
| | - Isabelle Bonnard
- USR3278 PSL CRIOBE CNRS-EPHE-UPVD, LabEx CORAIL, Université de Perpignan, 58 avenue Paul Alduy, 66860, Perpignan, France
| | - Xavier Pochon
- Coastal and Freshwater Group, Cawthron Institute, Private Bag 2, Nelson, 7042, New Zealand
- Institute of Marine Science, University of Auckland, Private Bag 349, Warkworth, 0941, New Zealand
| | - Vaimiti Dubousquet
- Délégation à la recherche, Government of French Polynesia BP 20981, 98713, Papeete, Tahiti, French Polynesia
| | - Phila Raharivelomanana
- UMR 241 EIO, Université de la Polynésie Française, BP 6570 Faaa, 98702, Faaa, Tahiti, French Polynesia
| | - Véronique Berteaux-Lecellier
- USR3278 PSL CRIOBE CNRS-EPHE-UPVD, LabEx CORAIL, Papetoai, Moorea, French Polynesia
- UMR250/9220 ENTROPIE IRD-CNRS-UR-IFREMER-UNC, Promenade Roger-Laroque, Noumea cedex, New Caledonia, France
| | - Gael Lecellier
- Université de Paris-Saclay, UVSQ, 45 avenue des Etats-Unis, Versailles Cedex, France
- UMR250/9220 ENTROPIE IRD-CNRS-UR-IFREMER-UNC, Promenade Roger-Laroque, Noumea cedex, New Caledonia, France
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8
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Sproles AE, Oakley CA, Matthews JL, Peng L, Owen JG, Grossman AR, Weis VM, Davy SK. Proteomics quantifies protein expression changes in a model cnidarian colonised by a thermally tolerant but suboptimal symbiont. ISME JOURNAL 2019; 13:2334-2345. [PMID: 31118473 DOI: 10.1038/s41396-019-0437-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 04/23/2019] [Accepted: 05/03/2019] [Indexed: 11/09/2022]
Abstract
The acquisition of thermally tolerant algal symbionts by corals has been proposed as a natural or assisted mechanism of increasing coral reef resilience to anthropogenic climate change, but the cell-level processes determining the performance of new symbiotic associations are poorly understood. We used liquid chromatography-mass spectrometry to investigate the effects of an experimentally induced symbiosis on the host proteome of the model sea anemone Exaiptasia pallida. Aposymbiotic specimens were colonised by either the homologous dinoflagellate symbiont (Breviolum minutum) or a thermally tolerant, ecologically invasive heterologous symbiont (Durusdinium trenchii). Anemones containing D. trenchii exhibited minimal expression of Niemann-Pick C2 proteins, which have predicted biochemical roles in sterol transport and cell recognition, and glutamine synthetases, which are thought to be involved in nitrogen assimilation and recycling between partners. D. trenchii-colonised anemones had higher expression of methionine-synthesising betaine-homocysteine S-methyltransferases and proteins with predicted oxidative stress response functions. Multiple lysosome-associated proteins were less abundant in both symbiotic treatments compared with the aposymbiotic treatment. The differentially abundant proteins are predicted to represent pathways that may be involved in nutrient transport or resource allocation between partners. These results provide targets for specific experiments to elucidate the mechanisms underpinning compensatory physiology in the coral-dinoflagellate symbiosis.
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Affiliation(s)
- Ashley E Sproles
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6140, New Zealand
| | - Clinton A Oakley
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6140, New Zealand
| | - Jennifer L Matthews
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6140, New Zealand
| | - Lifeng Peng
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6140, New Zealand
| | - Jeremy G Owen
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6140, New Zealand
| | - Arthur R Grossman
- Department of Plant Biology, The Carnegie Institution for Science, Stanford, CA, 94305, USA
| | - Virginia M Weis
- Department of Integrative Biology, Oregon State University, Corvallis, OR, 97331, USA
| | - Simon K Davy
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6140, New Zealand.
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9
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Aguilar C, Raina JB, Fôret S, Hayward DC, Lapeyre B, Bourne DG, Miller DJ. Transcriptomic analysis reveals protein homeostasis breakdown in the coral Acropora millepora during hypo-saline stress. BMC Genomics 2019; 20:148. [PMID: 30786881 PMCID: PMC6381741 DOI: 10.1186/s12864-019-5527-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 02/13/2019] [Indexed: 11/18/2022] Open
Abstract
Background Coral reefs can experience salinity fluctuations due to rainfall and runoff; these events can have major impacts on the corals and lead to bleaching and mortality. On the Great Barrier Reef (GBR), low salinity events, which occur during summer seasons and can involve salinity dropping ~ 10 PSU correlate with declines in coral cover, and these events are predicted to increase in frequency and severity under future climate change scenarios. In other marine invertebrates, exposure to low salinity causes increased expression of genes involved in proteolysis, responses to oxidative stress, and membrane transport, but the effects that changes in salinity have on corals have so far received only limited attention. To better understand the coral response to hypo-osmotic stress, here we investigated the transcriptomic response of the coral Acropora millepora in both adult and juvenile life stages to acute (1 h) and more prolonged (24 h) exposure to low salinity. Results Differential gene expression analysis revealed the involvement of both common and specific response mechanisms in Acropora. The general response to environmental stressors included up-regulation of genes involved in the mitigation of macromolecular and oxidative damage, while up-regulation of genes involved in amino acid metabolism and transport represent specific responses to salinity stress. Conclusions This study is the first comprehensive transcriptomic analysis of the coral response to low salinity stress and provides important insights into the likely consequences of heavy rainfall and runoff events on coral reefs. Electronic supplementary material The online version of this article (10.1186/s12864-019-5527-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Catalina Aguilar
- AIMS@JCU and Department of Molecular and Cell Biology, James Cook University, Townsville, Queensland, 4811, Australia.,ARC Centre of Excellence for Coral Reef Studies and Department of Molecular and Cell Biology, James Cook University, Townsville, Queensland, 4811, Australia.,Cooperative Institute for Marine and Atmospheric Studies, Rosenstiel School of Marine & Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida, 33149, USA.,Atlantic Oceanographic and Meteorological Laboratories (AOML), NOAA, 4301 Rickenbacker Causeway, Miami, Florida, 33149, USA
| | - Jean-Baptiste Raina
- AIMS@JCU and Department of Molecular and Cell Biology, James Cook University, Townsville, Queensland, 4811, Australia.,Climate Change Cluster (C3), University of Technology, Sydney, NSW, 2007, Australia
| | - Sylvain Fôret
- ARC Centre of Excellence for Coral Reef Studies and Department of Molecular and Cell Biology, James Cook University, Townsville, Queensland, 4811, Australia.,Division of Ecology and Evolution, Research School of Biology, Australian National University, Canberra, ACT, 2601, Australia
| | - David C Hayward
- Division of Ecology and Evolution, Research School of Biology, Australian National University, Canberra, ACT, 2601, Australia
| | - Bruno Lapeyre
- Laboratoire d'excellence CORAIL, Centre de Recherches Insulaires et Observatoire de l'Environnement (CRIOBE), Moorea, B.P.1013, Papeete, French Polynesia
| | - David G Bourne
- AIMS@JCU and Department of Molecular and Cell Biology, James Cook University, Townsville, Queensland, 4811, Australia.,Australian Institute of Marine Science, Townsville, Queensland, 4810, Australia.,College of Science and Engineering, James Cook University, Townsville, 4811, Australia
| | - David J Miller
- AIMS@JCU and Department of Molecular and Cell Biology, James Cook University, Townsville, Queensland, 4811, Australia. .,ARC Centre of Excellence for Coral Reef Studies and Department of Molecular and Cell Biology, James Cook University, Townsville, Queensland, 4811, Australia.
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10
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Abstract
Covering: January to December 2017This review covers the literature published in 2017 for marine natural products (MNPs), with 740 citations (723 for the period January to December 2017) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1490 in 477 papers for 2017), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. Geographic distributions of MNPs at a phylogenetic level are reported.
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Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. and Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
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11
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Kageyama H, Tanaka Y, Shibata A, Waditee-Sirisattha R, Takabe T. Dimethylsulfoniopropionate biosynthesis in a diatom Thalassiosira pseudonana: Identification of a gene encoding MTHB-methyltransferase. Arch Biochem Biophys 2018; 645:100-106. [PMID: 29574051 DOI: 10.1016/j.abb.2018.03.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/16/2018] [Accepted: 03/17/2018] [Indexed: 10/17/2022]
Abstract
Dimethylsulfoniopropionate (DMSP) is one of the most abundant molecules on earth and plays a pivotal role in the marine sulfur cycle. DMSP is believed to be synthesized from methionine by a four-step reaction pathway in marine algae. The genes responsible for biosynthesis of DMSP remain unidentified. A diatom Thalassiosira pseudonana CCMP1335 is an important component of marine ecosystems and contributes greatly to the world's primary production. In this study, through genome search, in vivo activity and functional studies of cDNA products, a gene encoding Thalassiosira methyltransferase (TpMMT) which catalyzes the key step of DMSP synthesis formation of 4-methylthio-2-hydroxybutyrate (DMSHB) from 4-methylthio-2-oxobutyrate (MTHB), was identified. The amino acid sequence of TpMMT was homologous to the methyltransferase from Phaeodactylum tricornutum CCAP 1055/1, but not the recently identified bacterium gene. High salinity and nitrogen limitation stresses caused the increase of DMSP content and TpMMT protein in Thalassiosira. In addition to TpMMT, the enzyme activities for the first three steps could be detected and enhanced under high salinity, suggesting the importance of four-step DMSP synthetic pathway in Thalassiosira.
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Affiliation(s)
- Hakuto Kageyama
- Graduate School of Environmental and Human Sciences, Meijo University, Nagoya 468-8502, Japan
| | - Yoshito Tanaka
- Graduate School of Environmental and Human Sciences, Meijo University, Nagoya 468-8502, Japan
| | - Ayumi Shibata
- Research Institute, Meijo University, Nagoya 468-8502, Japan
| | | | - Teruhiro Takabe
- Graduate School of Environmental and Human Sciences, Meijo University, Nagoya 468-8502, Japan; Research Institute, Meijo University, Nagoya 468-8502, Japan.
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Deschaseaux E, Hardefeldt J, Jones G, Reichelt-Brushett A. High zinc exposure leads to reduced dimethylsulfoniopropionate (DMSP) levels in both the host and endosymbionts of the reef-building coral Acropora aspera. MARINE POLLUTION BULLETIN 2018; 126:93-100. [PMID: 29421139 DOI: 10.1016/j.marpolbul.2017.10.070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/25/2017] [Accepted: 10/25/2017] [Indexed: 06/08/2023]
Abstract
Dimethylsulfoniopropionate (DMSP) is a biogenic compound that could be involved in metal detoxification in both the host and endosymbionts of symbiotic corals. Acropora aspera, a common reef-building coral of the Great Barrier Reef, was exposed to zinc doses from 10 to 1000μg/L over 96h, with zinc being a low-toxic trace metal commonly used in the shipping industry. Over time, significantly lower DMSP concentrations relative to the control were found in both the host and symbionts in the highest zinc treatment where zinc uptake by both partners of the symbiosis was the highest. This clearly indicates that DMSP was consumed or stopped being produced under high and extended zinc exposure. This drop in DMSP was first observed in the host tissue, suggesting that the coral host was the first to respond to metal contamination. Such decrease in DMSP concentrations could influence the long-term health of corals under zinc exposure.
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Affiliation(s)
- Elisabeth Deschaseaux
- Marine Ecology Research Centre, School of Environment Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia; Centre for Coastal Biogeochemistry Research, School of Environment Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
| | - Jannah Hardefeldt
- Marine Ecology Research Centre, School of Environment Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
| | - Graham Jones
- Marine Ecology Research Centre, School of Environment Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
| | - Amanda Reichelt-Brushett
- Marine Ecology Research Centre, School of Environment Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
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