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Nicolaï MPJ, Bok MJ, Abalos J, D'Alba L, Shawkey MD, Goldenberg J. The function and consequences of fluorescence in tetrapods. Proc Natl Acad Sci U S A 2024; 121:e2318189121. [PMID: 38814876 DOI: 10.1073/pnas.2318189121] [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] [Indexed: 06/01/2024] Open
Abstract
Fluorescence, the optical phenomenon whereby short-wavelength light is absorbed and emitted at longer wavelengths, has been widely described in aquatic habitats, in both invertebrates and fish. Recent years have seen a stream of articles reporting fluorescence, ranging from frogs, platypus, to even fully terrestrial organisms such as flying squirrels, often explicitly or implicitly linking the presence of fluorescence with sexual selection and communication. However, many of these studies fail to consider the physiological requirements of evolutionary stable signaling systems, the environmental dependence of perception, or the possible adaptive role of fluorescent coloration in a noncommunicative context. More importantly, the idea that fluorescence may simply constitute an indirect by-product of selection on other traits is often not explored. This is especially true for terrestrial systems where environmental light conditions are often not amenable for fluorescent signaling in contrast to, for example, aquatic habitats in which spectral properties of water promote functional roles for fluorescence. Despite the appeal of previously unknown ways in which coloration may drive evolution, the investigation of a putative role of fluorescence in communication must be tempered by a realistic understanding of its limitations. Here, we not only highlight and discuss the key body of literature but also address the potential pitfalls when reporting fluorescence and how to solve them. In addition, we propose exciting different research avenues to advance the field of tetrapod fluorescence.
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Affiliation(s)
- Michaël P J Nicolaï
- Biology Department, Evolution and Optics of Nanostructures Group, Ghent University, Ghent 9000, Belgium
- Museum of Comparative Zoology, Harvard University, Cambridge, MA
| | - Michael J Bok
- Lund Vision Group, Department of Biology, University of Lund, Lund 22362, Sweden
| | - Javier Abalos
- Division of Biodiversity and Evolution, Department of Biology, Lund University, 223 62 Lund, Sweden
- Ethology Lab, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, 46980 Paterna, Spain
| | - Liliana D'Alba
- Naturalis Biodiversity Center, 2333 CR Leiden, The Netherlands
| | - Matthew D Shawkey
- Biology Department, Evolution and Optics of Nanostructures Group, Ghent University, Ghent 9000, Belgium
| | - Jonathan Goldenberg
- Biology Department, Evolution and Optics of Nanostructures Group, Ghent University, Ghent 9000, Belgium
- Division of Biodiversity and Evolution, Department of Biology, Lund University, 223 62 Lund, Sweden
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2
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Schramm S, Weiß D. Bioluminescence - The Vibrant Glow of Nature and its Chemical Mechanisms. Chembiochem 2024; 25:e202400106. [PMID: 38469601 DOI: 10.1002/cbic.202400106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/09/2024] [Accepted: 03/11/2024] [Indexed: 03/13/2024]
Abstract
Bioluminescence, the mesmerizing natural phenomenon where living organisms produce light through chemical reactions, has long captivated scientists and laypersons alike, offering a rich tapestry of insights into biological function, ecology, evolution as well as the underlying chemistry. This comprehensive introductory review systematically explores the phenomenon of bioluminescence, addressing its historical context, geographic dispersion, and ecological significance with a focus on their chemical mechanisms. Our examination begins with terrestrial bioluminescence, discussing organisms from different habitats. We analyze thefireflies of Central Europe's meadows and the fungi in the Atlantic rainforest of Brazil. Additionally, we inspect bioluminescent species in New Zealand, specifically river-dwelling snails and mosquito larvae found in Waitomo Caves. Our exploration concludes in the Siberian Steppes, highlighting the area's luminescent insects and annelids. Transitioning to the marine realm, the second part of this review examines marine bioluminescent organisms. We explore this phenomenon in deep-sea jellyfish and their role in the ecosystem. We then move to Toyama Bay, Japan, where seasonal bioluminescence of dinoflagellates and ostracods present a unique case study. We also delve into the bacterial world, discussing how bioluminescent bacteria contribute to symbiotic relationships. For each organism, we contextualize its bioluminescence, providing details about its discovery, ecological function, and geographical distribution. A special focus lies on the examination of the underlying chemical mechanisms that enables these biological light displays. Concluding this review, we present a series of practical bioluminescence and chemiluminescence experiments, providing a resource for educational demonstrations and student research projects. Our goal with this review is to provide a summary of bioluminescence across the diverse ecological contexts, contributing to the broader understanding of this unique biological phenomenon and its chemical mechanisms serving researchers new to the field, educators and students alike.
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Affiliation(s)
- Stefan Schramm
- University of Applied Sciences Dresden (HTW Dresden), Friedrich-List-Platz 1, 01069, Dresden, Germany
| | - Dieter Weiß
- Institut für Organische und Makromolekulare Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 10, 07743, Jena, Germany
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3
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Clarke DN, Rose NH, De Meulenaere E, Rosental B, Pearse JS, Pearse VB, Deheyn DD. Fluorescent proteins generate a genetic color polymorphism and counteract oxidative stress in intertidal sea anemones. Proc Natl Acad Sci U S A 2024; 121:e2317017121. [PMID: 38457522 PMCID: PMC10945830 DOI: 10.1073/pnas.2317017121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 01/13/2024] [Indexed: 03/10/2024] Open
Abstract
Fluorescent proteins (FPs) are ubiquitous tools in research, yet their endogenous functions in nature are poorly understood. In this work, we describe a combination of functions for FPs in a clade of intertidal sea anemones whose FPs control a genetic color polymorphism together with the ability to combat oxidative stress. Focusing on the underlying genetics of a fluorescent green "Neon" color morph, we show that allelic differences in a single FP gene generate its strong and vibrant color, by increasing both molecular brightness and FP gene expression level. Natural variation in FP sequences also produces differences in antioxidant capacity. We demonstrate that these FPs are strong antioxidants that can protect live cells against oxidative stress. Finally, based on structural modeling of the responsible amino acids, we propose a model for FP antioxidant function that is driven by molecular surface charge. Together, our findings shed light on the multifaceted functions that can co-occur within a single FP and provide a framework for studying the evolution of fluorescence as it balances spectral and physiological functions in nature.
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Affiliation(s)
- D. Nathaniel Clarke
- Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA93950
| | - Noah H. Rose
- Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA93950
| | - Evelien De Meulenaere
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA92037
| | - Benyamin Rosental
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Center for Regenerative Medicine and Stem Cells, Ben-Gurion University of the Negev, Beer-Sheva84105, Israel
| | - John S. Pearse
- Department of Ecology and Evolutionary Biology, Joseph M. Long Marine Laboratory, University of California, Santa Cruz, CA95060
| | - Vicki Buchsbaum Pearse
- Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA93950
- Department of Ecology and Evolutionary Biology, Joseph M. Long Marine Laboratory, University of California, Santa Cruz, CA95060
| | - Dimitri D. Deheyn
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA92037
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4
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Poding LH, Jägers P, Herlitze S, Huhn M. Diversity and function of fluorescent molecules in marine animals. Biol Rev Camb Philos Soc 2024. [PMID: 38468189 DOI: 10.1111/brv.13072] [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: 08/07/2023] [Revised: 02/24/2024] [Accepted: 02/29/2024] [Indexed: 03/13/2024]
Abstract
Fluorescence in marine animals has mainly been studied in Cnidaria but is found in many different phyla such as Annelida, Crustacea, Mollusca, and Chordata. While many fluorescent proteins and molecules have been identified, very little information is available about the biological functions of fluorescence. In this review, we focus on describing the occurrence of fluorescence in marine animals and the behavioural and physiological functions of fluorescent molecules based on experimental approaches. These biological functions of fluorescence range from prey and symbiont attraction, photoprotection, photoenhancement, stress mitigation, mimicry, and aposematism to inter- and intraspecific communication. We provide a comprehensive list of marine taxa that utilise fluorescence, including demonstrated effects on behavioural or physiological responses. We describe the numerous known functions of fluorescence in anthozoans and their underlying molecular mechanisms. We also highlight that other marine taxa should be studied regarding the functions of fluorescence. We suggest that an increase in research effort in this field could contribute to understanding the capacity of marine animals to respond to negative effects of climate change, such as rising sea temperatures and increasing intensities of solar irradiation.
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Affiliation(s)
- Lars H Poding
- Department of General Zoology and Neurobiology, Institute of Biology and Biotechnology, Ruhr-University Bochum, Bochum, 44801, Germany
| | - Peter Jägers
- Department of General Zoology and Neurobiology, Institute of Biology and Biotechnology, Ruhr-University Bochum, Bochum, 44801, Germany
| | - Stefan Herlitze
- Department of General Zoology and Neurobiology, Institute of Biology and Biotechnology, Ruhr-University Bochum, Bochum, 44801, Germany
| | - Mareike Huhn
- Department of General Zoology and Neurobiology, Institute of Biology and Biotechnology, Ruhr-University Bochum, Bochum, 44801, Germany
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5
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Han T, Liao X, Guo Z, Chen JY, He C, Lu Z. Deciphering temporal gene expression dynamics in multiple coral species exposed to heat stress: Implications for predicting resilience. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169021. [PMID: 38061659 DOI: 10.1016/j.scitotenv.2023.169021] [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: 07/31/2023] [Revised: 11/21/2023] [Accepted: 11/29/2023] [Indexed: 01/18/2024]
Abstract
Coral reefs are facing unprecedented threats due to global climate change, particularly elevated sea surface temperatures causing coral bleaching. Understanding coral responses at the molecular level is crucial for predicting their resilience and developing effective conservation strategies. In this study, we conducted a comprehensive gene expression analysis of four coral species to investigate their long-term molecular response to heat stress. We identified distinct gene expression patterns among the coral species, with laminar corals exhibiting a stronger response compared to branching corals. Heat shock proteins (HSPs) showed an overall decreasing expression trend, indicating the high energy cost associated with sustaining elevated HSP levels during prolonged heat stress. Peroxidases and oxidoreductases involved in oxidative stress response demonstrated significant upregulation, highlighting their role in maintaining cellular redox balance. Differential expression of genes related to calcium homeostasis and bioluminescence suggested distinct mechanisms for coping with heat stress among the coral species. Furthermore, the impact of heat stress on coral biomineralization varied, with downregulation of carbonic anhydrase and skeletal organic matrix proteins indicating reduced capacity for biomineralization in the later stages of heat stress. Our findings provide insights into the molecular mechanisms underlying coral responses to heat stress and highlight the importance of considering species-specific responses in assessing coral resilience. The identified biomarkers may serve as indicators of heat stress and contribute to early detection of coral bleaching events. These findings contribute to our understanding of coral resilience and provide a basis for future research aimed at enhancing coral survival in the face of climate change.
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Affiliation(s)
- Tingyu Han
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Xin Liao
- Guangxi Key Lab of Mangrove Conservation and Utilization, Guangxi Mangrove Research Center, Beihai 536000, China
| | - Zhuojun Guo
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - J-Y Chen
- Nanjing Institute of Paleontology and Geology, Nanjing 210008, China
| | - Chunpeng He
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Zuhong Lu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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6
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Scucchia F, Wong K, Zaslansky P, Putnam HM, Goodbody-Gringley G, Mass T. Morphological and genetic mechanisms underlying the plasticity of the coral Porites astreoides across depths in Bermuda. J Struct Biol 2023; 215:108036. [PMID: 37832837 DOI: 10.1016/j.jsb.2023.108036] [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: 06/21/2023] [Revised: 10/08/2023] [Accepted: 10/10/2023] [Indexed: 10/15/2023]
Abstract
The widespread decline of shallow-water coral reefs has fueled interest in assessing whether mesophotic reefs can act as refugia replenishing deteriorated shallower reefs through larval exchange. Here we explore the morphological and molecular basis facilitating survival of planulae and adults of the coral Porites astreoides (Lamarck, 1816; Hexacorallia: Poritidae) along the vertical depth gradient in Bermuda. We found differences in micro-skeletal features such as bigger calyxes and coarser surface of the skeletal spines in shallow corals. Yet, tomographic reconstructions reveal an analogous mineral distribution between shallow and mesophotic adults, pointing to similar skeleton growth dynamics. Our study reveals patterns of host genetic connectivity and minimal symbiont depth-zonation across a broader depth range than previously known for this species in Bermuda. Transcriptional variations across life stages showed different regulation of metabolism and stress response functions, unraveling molecular responses to environmental conditions at different depths. Overall, these findings increase our understanding of coral acclimatory capability across broad vertical gradients, ultimately allowing better evaluation of the refugia potential of mesophotic reefs.
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Affiliation(s)
- Federica Scucchia
- Department of Marine Biology, Leon H. Charney School of Marine Sciences University of Haifa, Israel; The Interuniversity Institute of Marine Sciences, Eilat, Israel.
| | - Kevin Wong
- Department of Biological Sciences, University of Rhode Island, Kingston, United States
| | - Paul Zaslansky
- Department for Operative, Preventive and Pediatric Dentistry, Charité-Universitätsmedizin, Berlin, Germany
| | - Hollie M Putnam
- Department of Biological Sciences, University of Rhode Island, Kingston, United States
| | - Gretchen Goodbody-Gringley
- Central Caribbean Marine Institute, Little Cayman, Cayman Islands; Bermuda Institute of Ocean Sciences, St. George's, Bermuda
| | - Tali Mass
- Department of Marine Biology, Leon H. Charney School of Marine Sciences University of Haifa, Israel.
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7
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Travouillon KJ, Cooper C, Bouzin JT, Umbrello LS, Lewis SW. All-a-glow: spectral characteristics confirm widespread fluorescence for mammals. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230325. [PMID: 37800154 PMCID: PMC10548093 DOI: 10.1098/rsos.230325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 09/08/2023] [Indexed: 10/07/2023]
Abstract
Mammalian fluorescence has been reported from numerous species of monotreme, marsupial and placental mammal. However, it is unknown how widespread this phenomenon is among mammals, it is unclear for many species if these observations of 'glowing' are true fluorescence and the biological function of fluorescence remains undetermined. We examined a wide range of mammal species held in a museum collection for the presence of apparent fluorescence using UV light, and then analysed a subset of preserved and non-preserved specimens by fluorescent spectroscopy at three different excitation wavelengths to assess whether the observations were fluorescence or optical scatter, and the impact of specimen preservation. We also evaluated if fluorescence was related to biological traits. We found that fluorescence is widespread in mammalian taxa; we identified examples of the phenomena among 125 species representing all 27 living mammalian orders and 79 families. For a number of model species, there was no evidence of a corresponding shift in the emission spectra when the wavelength of excitation was shifted, suggesting that observations of 'glowing' mammals were indeed fluorescence. Preservation method impacted the intensity of fluorescence. Fluorescence was most common and most intense among nocturnal species and those with terrestrial, arboreal and fossorial habits, with more of their body being more fluorescent. It remains unclear if fluorescence has any specific biological role for mammals. It appears to be a ubiquitous property of unpigmented fur and skin but may function to make these areas appear brighter and therefore enhance visual signalling, especially for nocturnal species.
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Affiliation(s)
- Kenny J. Travouillon
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
- Collections and Research, Western Australian Museum, Welshpool, Western Australia 6106, Australia
| | - Christine Cooper
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Jemmy T. Bouzin
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Linette S. Umbrello
- Collections and Research, Western Australian Museum, Welshpool, Western Australia 6106, Australia
- School of Biology and Environmental Science, Queensland University of Technology, Gardens Point Campus, 2 George Street, Brisbane, Queensland 4001, Australia
| | - Simon W. Lewis
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
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8
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Lyndby NH, Murthy S, Bessette S, Jakobsen SL, Meibom A, Kühl M. Non-invasive investigation of the morphology and optical properties of the upside-down jellyfish Cassiopea with optical coherence tomography. Proc Biol Sci 2023; 290:20230127. [PMID: 37752841 PMCID: PMC10523073 DOI: 10.1098/rspb.2023.0127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 08/30/2023] [Indexed: 09/28/2023] Open
Abstract
The jellyfish Cassiopea largely cover their carbon demand via photosynthates produced by microalgal endosymbionts, but how holobiont morphology and tissue optical properties affect the light microclimate and symbiont photosynthesis in Cassiopea remain unexplored. Here, we use optical coherence tomography (OCT) to study the morphology of Cassiopea medusae at high spatial resolution. We include detailed 3D reconstructions of external micromorphology, and show the spatial distribution of endosymbionts and white granules in the bell tissue. Furthermore, we use OCT data to extract inherent optical properties from light-scattering white granules in Cassiopea, and show that granules enhance local light-availability for symbionts in close proximity. Individual granules had a scattering coefficient of µs = 200-300 cm-1, and scattering anisotropy factor of g = 0.7, while large tissue-regions filled with white granules had a lower µs = 40-100 cm-1, and g = 0.8-0.9. We combined OCT information with isotopic labelling experiments to investigate the effect of enhanced light-availability in whitish tissue regions. Endosymbionts located in whitish tissue exhibited significantly higher carbon fixation compared to symbionts in anastomosing tissue (i.e. tissue without light-scattering white granules). Our findings support previous suggestions that white granules in Cassiopea play an important role in the host modulation of the light-microenvironment.
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Affiliation(s)
- Niclas Heidelberg Lyndby
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Swathi Murthy
- Marine Biological Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
| | - Sandrine Bessette
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
- Laboratoire MAPIEM, Université de Toulon, 4323 Toulon, France
| | - Sofie Lindegaard Jakobsen
- Marine Biological Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
| | - Anders Meibom
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
- Center for Advanced Surface Analysis, Institute of Earth Science, University of Lausanne, 1015 Lausanne, Switzerland
| | - Michael Kühl
- Marine Biological Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
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9
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Hao S, Qi Y, Zhang Z. Influence of Light Conditions on the Antibacterial Performance and Mechanism of Waterborne Fluorescent Coatings Based on Waterproof Long Afterglow Phosphors/PDMS Composites. Polymers (Basel) 2023; 15:3873. [PMID: 37835922 PMCID: PMC10574996 DOI: 10.3390/polym15193873] [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: 08/14/2023] [Revised: 09/18/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
Marine microbial adhesion is the fundamental cause of large-scale biological fouling. Low surface energy coatings can prevent marine installations from biofouling; nevertheless, their static antifouling abilities are limited in the absence of shear forces produced by seawater. Novel waterborne antifouling coatings inspired by fluorescent coral were reported in this paper. Waterproof long afterglow phosphors (WLAP) were introduced into waterborne silicone elastomers by the physical blending method. The composite coatings store energy during the day, and the various colors of light emitted at night affect the regular physiological activities of marine bacteria. Due to the synergistic effect of fouling-release and fluorescence antifouling, the WLAP/polydimethylsiloxane (PDMS) composite coating showed excellent antifouling abilities. The antibacterial performance of coatings was tested under simulated day-night alternation, continuous light, and constant dark conditions, respectively. The results illustrated that the antibacterial performance of composite coatings under simulated day-night alternation conditions was significantly better than that under continuous light or darkness. The weak lights emitted by the coating can effectively inhibit the adhesion of bacteria. C-SB/PDMS showed the best antibacterial effect, with a bacterial adhesion rate (BAR) of only 3.7%. Constant strong light also affects the normal physiological behavior of bacteria, and the weak light of coatings was covered. The antibacterial ability of coatings primarily relied on their surface properties under continuous dark conditions. The fluorescent effect played a vital role in the synergetic antifouling mechanism. This study enhanced the static antifouling abilities of coatings and provided a new direction for environmentally friendly and long-acting marine antifouling coatings.
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Affiliation(s)
- Sinan Hao
- Key Laboratory of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China; (S.H.); (Z.Z.)
- Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Yuhong Qi
- Key Laboratory of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China; (S.H.); (Z.Z.)
- Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Zhanping Zhang
- Key Laboratory of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China; (S.H.); (Z.Z.)
- Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China
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10
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Hawthorn A, Berzins IK, Dennis MM, Kiupel M, Newton AL, Peters EC, Reyes VA, Work TM. An introduction to lesions and histology of scleractinian corals. Vet Pathol 2023; 60:529-546. [PMID: 37519147 DOI: 10.1177/03009858231189289] [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] [Indexed: 08/01/2023]
Abstract
Stony corals (Scleractinia) are in the Phylum Cnidaria (cnidae referring to various types of stinging cells). They may be solitary or colonial, but all secrete an external, supporting aragonite skeleton. Large, colonial members of this phylum are responsible for the accretion of coral reefs in tropical and subtropical waters that form the foundations of the most biodiverse marine ecosystems. Coral reefs worldwide, but particularly in the Caribbean, are experiencing unprecedented levels of disease, resulting in reef degradation. Most coral diseases remain poorly described and lack clear case definitions, while the etiologies and pathogenesis are even more elusive. This introductory guide is focused on reef-building corals and describes basic gross and microscopic lesions in these corals in order to serve as an invitation to other veterinary pathologists to play a critical role in defining and advancing the field of coral pathology.
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Affiliation(s)
- Aine Hawthorn
- University of Wisconsin-Madison, Madison, WI
- U.S. Geological Survey, Seattle, WA
| | - Ilze K Berzins
- University of Florida, Gainesville, FL
- One Water, One Health, LLC, Golden Valley, MN
| | | | | | - Alisa L Newton
- ZooQuatic Laboratory, LLC, Baltimore, MD
- OCEARCH, Park City, UT
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11
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Kramer N, Tamir R, Galindo-Martínez CT, Wangpraseurt D, Loya Y. Light pollution alters the skeletal morphology of coral juveniles and impairs their light capture capacity. MARINE POLLUTION BULLETIN 2023; 193:115212. [PMID: 37385181 DOI: 10.1016/j.marpolbul.2023.115212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/13/2023] [Accepted: 06/21/2023] [Indexed: 07/01/2023]
Abstract
Urbanization and infrastructure development have changed the night-time light regime of many coastal marine habitats. Consequently, Artificial Light at Night (ALAN) is becoming a global ecological concern, particularly in nearshore coral reef ecosystems. However, the effects of ALAN on coral architecture and their optical properties are unexplored. Here, we conducted a long-term ex situ experiment (30 months from settlement) on juvenile Stylophora pistillata corals grown under ALAN conditions using light-emitting diodes (LEDs) and fluorescent lamps, mimicking light-polluted habitats. We found that corals exposed to ALAN exhibited altered skeletal morphology that subsequently resulted in reduced light capture capacity, while also gaining better structural and optical modifications to increased light levels than their ambient-light counterparts. Additionally, light-polluted corals developed a more porous skeleton compared to the control corals. We suggest that ALAN induces light stress in corals, leading to a decrease in the solar energy available for photosynthesis during daytime illumination.
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Affiliation(s)
- Netanel Kramer
- School of Zoology, Tel-Aviv University, Tel Aviv, Israel; The Steinhardt Museum of Natural History, Israel National Center for Biodiversity Studies, Tel Aviv, Israel.
| | - Raz Tamir
- Israel Oceanography & Limnological Research, National Institute of Oceanography, Haifa, Israel
| | | | - Daniel Wangpraseurt
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego,San Diego, USA; Department of Nanoengineering, University of California San Diego, San Diego, USA
| | - Yossi Loya
- School of Zoology, Tel-Aviv University, Tel Aviv, Israel
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12
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Burn D, Hoey AS, Matthews S, Harrison HB, Pratchett MS. Differential bleaching susceptibility among coral taxa and colony sizes, relative to bleaching severity across Australia's Great Barrier Reef and Coral Sea Marine Parks. MARINE POLLUTION BULLETIN 2023; 191:114907. [PMID: 37080018 DOI: 10.1016/j.marpolbul.2023.114907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/21/2023] [Accepted: 04/02/2023] [Indexed: 05/03/2023]
Abstract
Climate-induced coral bleaching represents the foremost threat to coral assemblages globally, however bleaching susceptibility varies among and within coral taxa. We compared bleaching susceptibility among 10 coral morpho-taxa and two colony size classes relative to reef-scale bleaching severity at 33 reefs across the Great Barrier Reef and Coral Sea Marine Parks in February-March 2020. Colony size and bleaching severity caused the hierarchy of bleaching susceptibility among taxa to change considerably. Notably, massive Porites shifted from being among the least likely taxa to exhibit bleaching, to among the most susceptible as overall bleaching severity increased. Juvenile corals (≤5 cm diameter) were generally more resistant to bleaching, except for Montipora and Pocillopora colonies, which were more likely to bleach than adults (>5 cm). These findings suggest that colony size and reef-scale bleaching severity are important determinants of bleaching susceptibility among taxa and provide insights into possible shifts in the structure of coral assemblages caused by bleaching events.
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Affiliation(s)
- D Burn
- College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia.
| | - A S Hoey
- College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
| | - S Matthews
- College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
| | - H B Harrison
- College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia; School of Biological Sciences, University of Bristol, Bristol BS8 1TQ, UK
| | - M S Pratchett
- College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
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13
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Peng W, Maydew CC, Kam H, Lynd JK, Tutol JN, Phelps SM, Abeyrathna S, Meloni G, Dodani SC. Discovery of a monomeric green fluorescent protein sensor for chloride by structure-guided bioinformatics. Chem Sci 2022; 13:12659-12672. [PMID: 36519056 PMCID: PMC9645410 DOI: 10.1039/d2sc03903f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 10/05/2022] [Indexed: 11/21/2022] Open
Abstract
Chloride is an essential anion for all forms of life. Beyond electrolyte balance, an increasing body of evidence points to new roles for chloride in normal physiology and disease. Over the last two decades, this understanding has been advanced by chloride-sensitive fluorescent proteins for imaging applications in living cells. To our surprise, these sensors have primarily been engineered from the green fluorescent protein (GFP) found in the jellyfish Aequorea victoria. However, the GFP family has a rich sequence space that could already encode for new sensors with desired properties, thereby minimizing protein engineering efforts and accelerating biological applications. To efficiently sample this space, we present and validate a stepwise bioinformatics strategy focused first on the chloride binding pocket and second on a monomeric oligomerization state. Using this, we identified GFPxm163 from GFPxm found in the jellyfish Aequorea macrodactyla. In vitro characterization shows that the binding of chloride as well as bromide, iodide, and nitrate rapidly tunes the ground state chromophore equilibrium from the phenolate to the phenol state generating a pH-dependent, turn-off fluorescence response. Furthermore, live-cell fluorescence microscopy reveals that GFPxm163 provides a reversible, yet indirect readout of chloride transport via iodide exchange. With this demonstration, we anticipate that the pairing of bioinformatics with protein engineering methods will provide an efficient methodology to discover and design new chloride-sensitive fluorescent proteins for cellular applications.
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Affiliation(s)
- Weicheng Peng
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
- Department of Biological Sciences, The University of Texas at Dallas Richardson 75080 Texas USA
| | - Caden C Maydew
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
| | - Hiu Kam
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
| | - Jacob K Lynd
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
| | - Jasmine N Tutol
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
| | - Shelby M Phelps
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
| | - Sameera Abeyrathna
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
| | - Gabriele Meloni
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
| | - Sheel C Dodani
- Department of Chemistry and Biochemistry, The University of Texas at Dallas Richardson 75080 Texas USA
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14
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Zhang Y, Chen RW, Liu X, Zhu M, Li Z, Wang A, Li X. Oxidative stress, apoptosis, and transcriptional responses in Acropora microphthalma under simulated diving activities. MARINE POLLUTION BULLETIN 2022; 183:114084. [PMID: 36058177 DOI: 10.1016/j.marpolbul.2022.114084] [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: 06/23/2022] [Revised: 08/16/2022] [Accepted: 08/21/2022] [Indexed: 06/15/2023]
Abstract
This study simulated the effects of diving activities on the physiology, enzymatic, and transcriptional responses of Acropora microphthalma. Touching had less impact on Fv/Fm, but a few zooxanthellae were decreased and minor MDA was elevated. Caspase 3 was activated to remove damaged cells, and SOD was increased to alleviate oxidative damage. Under double or triple diving stress, we observed mass loss of zooxanthellae and Fv/Fm, a significant increase in MDA, and SOD, CAT was activated in response to oxidative stress. Transcriptome analyses showed that corals activated immune signaling pathways, anti-oxidation pathways, lysosomal, phagosomal, and cellular autophagy pathways to manage oxidation stress. Moreover, it up-regulated carbohydrate metabolisms, as well as lipopolysaccharide metabolism, glycosphingolipid biosynthesis, photorespiration, amino acid metabolism, and fatty acid beta-oxidation, but down-regulated fatty acid biosynthesis to answer energy insufficiency. This research supported that even in a short time, improper diving activities could have a serious impact on coral health.
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Affiliation(s)
- Yu Zhang
- College of Marine Science, Hainan University, Haikou, China
| | - Rou-Wen Chen
- College of Marine Science, Hainan University, Haikou, China.
| | - Xiangbo Liu
- College of Marine Science, Hainan University, Haikou, China
| | - Ming Zhu
- College of Marine Science, Hainan University, Haikou, China
| | - Zhuoran Li
- College of Marine Science, Hainan University, Haikou, China
| | - Aimin Wang
- College of Marine Science, Hainan University, Haikou, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China
| | - Xiubao Li
- College of Marine Science, Hainan University, Haikou, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China.
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15
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Evaluation of fluorescence-based viability stains in cells dissociated from scleractinian coral Pocillopora damicornis. Sci Rep 2022; 12:15297. [PMID: 36097278 PMCID: PMC9468155 DOI: 10.1038/s41598-022-19586-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 08/31/2022] [Indexed: 11/09/2022] Open
Abstract
The application of established cell viability assays such as the commonly used trypan blue staining method to coral cells is not straightforward due to different culture parameters and different cellular features specific to mammalian cells compared to marine invertebrates. Using Pocillopora damicornis as a model, we characterized the autofluorescence and tested different fluorescent dye pair combinations to identify alternative viability indicators. The cytotoxicity of different representative molecules, namely small organic molecules, proteins and nanoparticles (NP), was measured after 24 h of exposure using the fluorescent dye pair Hoechst 33342 and SYTOX orange. Our results show that this dye pair can be distinctly measured in the presence of fluorescent proteins plus chlorophyll. P. damicornis cells exposed for 24 h to Triton-X100, insulin or titanium dioxide (TiO2) NPs, respectively, at concentrations ranging from 0.5 to 100 µg/mL, revealed a LC50 of 0.46 µg/mL for Triton-X100, 6.21 µg/mL for TiO2 NPs and 33.9 µg/mL for insulin. This work presents the approach used to customize dye pairs for membrane integrity-based cell viability assays considering the species- and genotype-specific autofluorescence of scleractinian corals, namely: endogenous fluorescence characterization followed by the selection of dyes that do not overlap with endogenous signals.
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16
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Winston M, Oliver T, Couch C, Donovan MK, Asner GP, Conklin E, Fuller K, Grady BW, Huntington B, Kageyama K, Kindinger TL, Kozar K, Kramer L, Martinez T, McCutcheon A, McKenna S, Rodgers K, Shayler CK, Vargas-Angel B, Zgliczynski B. Coral taxonomy and local stressors drive bleaching prevalence across the Hawaiian Archipelago in 2019. PLoS One 2022; 17:e0269068. [PMID: 36048764 PMCID: PMC9436070 DOI: 10.1371/journal.pone.0269068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 05/13/2022] [Indexed: 11/18/2022] Open
Abstract
The Hawaiian Archipelago experienced a moderate bleaching event in 2019—the third major bleaching event over a 6-year period to impact the islands. In response, the Hawai‘i Coral Bleaching Collaborative (HCBC) conducted 2,177 coral bleaching surveys across the Hawaiian Archipelago. The HCBC was established to coordinate bleaching monitoring efforts across the state between academic institutions, non-governmental organizations, and governmental agencies to facilitate data sharing and provide management recommendations. In 2019, the goals of this unique partnership were to: 1) assess the spatial and temporal patterns of thermal stress; 2) examine taxa-level patterns in bleaching susceptibility; 3) quantify spatial variation in bleaching extent; 4) compare 2019 patterns to those of prior bleaching events; 5) identify predictors of bleaching in 2019; and 6) explore site-specific management strategies to mitigate future bleaching events. Both acute thermal stress and bleaching in 2019 were less severe overall compared to the last major marine heatwave events in 2014 and 2015. Bleaching observed was highly site- and taxon-specific, driven by the susceptibility of remaining coral assemblages whose structure was likely shaped by previous bleaching and subsequent mortality. A suite of environmental and anthropogenic predictors was significantly correlated with observed bleaching in 2019. Acute environmental stressors, such as temperature and surface light, were equally important as previous conditions (e.g. historical thermal stress and historical bleaching) in accounting for variation in bleaching during the 2019 event. We found little evidence for acclimation by reefs to thermal stress in the main Hawaiian Islands. Moreover, our findings illustrate how detrimental effects of local anthropogenic stressors, such as tourism and urban run-off, may be exacerbated under high thermal stress. In light of the forecasted increase in severity and frequency of bleaching events, future mitigation of both local and global stressors is a high priority for the future of corals in Hawai‘i.
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Affiliation(s)
- Morgan Winston
- Cooperative Institute for Marine and Atmospheric Research, University of Hawai‘i, Honolulu, Hawai‘i, United States of America
- Pacific Islands Fisheries Science Center, National Marine Fisheries Service, Honolulu, Hawai‘i, United States of America
- Center for Global Discovery and Conservation Science and School of Geographic Sciences and Urban Planning, Arizona State University, Hilo, Hawai‘i, United States of America
- * E-mail:
| | - Thomas Oliver
- Pacific Islands Fisheries Science Center, National Marine Fisheries Service, Honolulu, Hawai‘i, United States of America
| | - Courtney Couch
- Cooperative Institute for Marine and Atmospheric Research, University of Hawai‘i, Honolulu, Hawai‘i, United States of America
- Pacific Islands Fisheries Science Center, National Marine Fisheries Service, Honolulu, Hawai‘i, United States of America
| | - Mary K. Donovan
- Center for Global Discovery and Conservation Science and School of Geographic Sciences and Urban Planning, Arizona State University, Hilo, Hawai‘i, United States of America
| | - Gregory P. Asner
- Center for Global Discovery and Conservation Science and School of Geographic Sciences and Urban Planning, Arizona State University, Hilo, Hawai‘i, United States of America
| | - Eric Conklin
- The Nature Conservancy, Honolulu, Hawai‘i, United States of America
| | - Kimberly Fuller
- Division of Aquatic Resources (O‘ahu), Anuenue Fisheries Research Center, Honolulu, Hawai‘i, United States of America
| | - Bryant W. Grady
- Center for Global Discovery and Conservation Science and School of Geographic Sciences and Urban Planning, Arizona State University, Hilo, Hawai‘i, United States of America
| | - Brittany Huntington
- Cooperative Institute for Marine and Atmospheric Research, University of Hawai‘i, Honolulu, Hawai‘i, United States of America
- Pacific Islands Fisheries Science Center, National Marine Fisheries Service, Honolulu, Hawai‘i, United States of America
| | - Kazuki Kageyama
- Division of Aquatic Resources (O‘ahu), Anuenue Fisheries Research Center, Honolulu, Hawai‘i, United States of America
| | - Tye L. Kindinger
- Pacific Islands Fisheries Science Center, National Marine Fisheries Service, Honolulu, Hawai‘i, United States of America
| | - Kelly Kozar
- Pacific Island Network Inventory and Monitoring Program, Hawai‘i National Park, Hawai‘i, United States of America
| | - Lindsey Kramer
- Division of Aquatic Resources (Kona), Kailua-Kona, Hawai‘i, United States of America
| | - Tatiana Martinez
- Division of Aquatic Resources (Maui), Wailuku, Hawai‘i, United States of America
| | - Amanda McCutcheon
- Pacific Island Network Inventory and Monitoring Program, Hawai‘i National Park, Hawai‘i, United States of America
| | - Sheila McKenna
- Pacific Island Network Inventory and Monitoring Program, Hawai‘i National Park, Hawai‘i, United States of America
| | - Ku‘ulei Rodgers
- Hawai‘i Institute of Marine Biology, Kāne‘ohe, Hawai‘i, United States of America
| | | | - Bernardo Vargas-Angel
- Cooperative Institute for Marine and Atmospheric Research, University of Hawai‘i, Honolulu, Hawai‘i, United States of America
- Pacific Islands Fisheries Science Center, National Marine Fisheries Service, Honolulu, Hawai‘i, United States of America
| | - Brian Zgliczynski
- Scripps Institution of Oceanography, La Jolla, California, United States of America
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17
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Prasetia R, Sinniger F, Nakamura T, Harii S. Limited acclimation of early life stages of the coral Seriatopora hystrix from mesophotic depth to shallow reefs. Sci Rep 2022; 12:12836. [PMID: 35896607 PMCID: PMC9329301 DOI: 10.1038/s41598-022-16024-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 07/04/2022] [Indexed: 11/10/2022] Open
Abstract
Mesophotic coral ecosystems (MCEs, reefs between 30 and 150 m depth) have been hypothesized to contribute to shallow reef recovery through the recruitment of larvae. However, few studies have directly examined this. Here we used mesophotic colonies of Seriatopora hystrix, a depth generalist coral, to investigate the effect of light intensity on larval behavior and settlement through ex situ experiments. We also investigated juvenile survival, growth, and physiological acclimation in situ. Bleached larvae and a significant reduction in settlement rates were found when the mesophotic larvae were exposed to light conditions corresponding to shallow depths (5 and 10 m) ex situ. The in situ experiments showed that mesophotic juveniles survived well at 20 and 40 m, with juveniles in shaded areas surviving longer than three months at 3–5 m during a year of mass bleaching in 2016. Juvenile transplants at 20 m showed a sign of physiological acclimation, which was reflected by a significant decline in maximum quantum yield. These results suggest that light is a significant factor for successful recolonization of depth-generalist corals to shallow reefs. Further, recolonization of shallow reefs may only occur in shaded habitats or potentially through multigenerational recruitments with intermediate depths acting as stepping stones.
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Affiliation(s)
- Rian Prasetia
- Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, Sesoko 3422, Motobu, Okinawa, 905-0227, Japan
| | - Frederic Sinniger
- Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, Sesoko 3422, Motobu, Okinawa, 905-0227, Japan
| | - Takashi Nakamura
- Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, Sesoko 3422, Motobu, Okinawa, 905-0227, Japan.,Faculty of Science, University of the Ryukyus, Nishihara, Okinawa, 903-0213, Japan
| | - Saki Harii
- Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, Sesoko 3422, Motobu, Okinawa, 905-0227, Japan.
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18
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Bollati E, Lyndby NH, D'Angelo C, Kühl M, Wiedenmann J, Wangpraseurt D. Green fluorescent protein-like pigments optimize the internal light environment in symbiotic reef building corals. eLife 2022; 11:73521. [PMID: 35801683 PMCID: PMC9342951 DOI: 10.7554/elife.73521] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 07/07/2022] [Indexed: 11/25/2022] Open
Abstract
Pigments homologous to the green fluorescent protein (GFP) have been proposed to fine-tune the internal light microclimate of corals, facilitating photoacclimation of photosynthetic coral symbionts (Symbiodiniaceae) to life in different reef habitats and environmental conditions. However, direct measurements of the in vivo light conditions inside the coral tissue supporting this conclusion are lacking. Here, we quantified the intra-tissue spectral light environment of corals expressing GFP-like proteins from widely different light regimes. We focus on: (1) photoconvertible red fluorescent proteins (pcRFPs), thought to enhance photosynthesis in mesophotic habitats via wavelength conversion, and (2) chromoproteins (CPs), which provide photoprotection to the symbionts in shallow water via light absorption. Optical microsensor measurements indicated that both pigment groups strongly alter the coral intra-tissue light environment. Estimates derived from light spectra measured in pcRFP-containing corals showed that fluorescence emission can contribute to >50% of orange-red light available to the photosynthetic symbionts at mesophotic depths. We further show that upregulation of pink CPs in shallow-water corals during bleaching leads to a reduction of orange light by 10–20% compared to low-CP tissue. Thus, screening by CPs has an important role in mitigating the light-enhancing effect of coral tissue scattering and skeletal reflection during bleaching. Our results provide the first experimental quantification of the importance of GFP-like proteins in fine-tuning the light microclimate of corals during photoacclimation.
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Affiliation(s)
- Elena Bollati
- Department of Biology, University of Copenhagen, Helsingør, Denmark
| | - Niclas H Lyndby
- Laboratory for Biological Geochemistry, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Cecilia D'Angelo
- Coral Reef Laboratory, University of Southampton, Southampton, United Kingdom
| | - Michael Kühl
- Department of Biology, University of Copenhagen, Helsingør, Denmark
| | - Jörg Wiedenmann
- Coral Reef Laboratory, University of Southampton, Southampton, United Kingdom
| | - Daniel Wangpraseurt
- Department of NanoEngineering, University of California, San Diego, San Diego, United States
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19
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Ben-Zvi O, Lindemann Y, Eyal G, Loya Y. Coral fluorescence: a prey-lure in deep habitats. Commun Biol 2022; 5:537. [PMID: 35654953 PMCID: PMC9163160 DOI: 10.1038/s42003-022-03460-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 05/09/2022] [Indexed: 11/09/2022] Open
Abstract
AbstractFluorescence is highly prevalent in reef-building corals, nevertheless its biological role is still under ongoing debate. This feature of corals was previously suggested to primarily screen harmful radiation or facilitate coral photosynthesis. In mesophotic coral ecosystems (MCEs; 30-150 m depth) corals experience a limited, blue-shifted light environment. Consequently, in contrast to their shallow conspecifics, they might not be able to rely on photosynthates from their photosymbionts as their main energy source. Here, we experimentally test an alternative hypothesis for coral fluorescence: a prey-lure mechanism for plankton. We show that plankton exhibit preferential swimming towards green fluorescent cues and that compared to other morphs, higher predation rates are recorded in a green fluorescing morph of the mesophotic coral Euphyllia paradivisa. The evidence provided here - that plankton are actively attracted to fluorescent signals - indicates the significant role of fluorescence in amplifying the nutritional sink adjacent to coral reefs.
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20
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Schramm S, Weiß D. Biolumineszenz – Teil 2: Maritime Biolumineszenz. CHEM UNSERER ZEIT 2022. [DOI: 10.1002/ciuz.202100020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Stefan Schramm
- Institut für Organische und Makromolekulare Chemie Friedrich‐Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
- Merck KGaA Frankfurter Straße 250 64293 Darmstadt Deutschland
| | - Dieter Weiß
- Institut für Organische und Makromolekulare Chemie Friedrich‐Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
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21
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High light quantity suppresses locomotion in symbiotic Aiptasia. Symbiosis 2022. [DOI: 10.1007/s13199-022-00841-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractMany cnidarians engage in endosymbioses with microalgae of the family Symbiodiniaceae. In this association, the fitness of the cnidarian host is closely linked to the photosynthetic performance of its microalgal symbionts. Phototaxis may enable semi-sessile cnidarians to optimize the light regime for their microalgal symbionts. Indeed, phototaxis and phototropism have been reported in the photosymbiotic sea anemone Aiptasia. However, the influence of light quantity on the locomotive behavior of Aiptasia remains unknown. Here we show that light quantity and the presence of microalgal symbionts modulate the phototactic behavior in Aiptasia. Although photosymbiotic Aiptasia were observed to move in seemingly random directions along an experimental light gradient, their probability of locomotion depended on light quantity. As photosymbiotic animals were highly mobile in low light but almost immobile at high light quantities, photosymbiotic Aiptasia at low light quantities exhibited an effective net movement towards light levels sufficient for positive net photosynthesis. In contrast, aposymbiotic Aiptasia exhibited greater mobility than their photosymbiotic counterparts, regardless of light quantity. Our results suggest that photosynthetic activity of the microalgal symbionts suppresses locomotion in Aiptasia, likely by supporting a positive energy balance in the host. We propose that motile photosymbiotic organisms can develop phototactic behavior as a consequence of starvation linked to symbiotic nutrient cycling.
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22
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Anthony CJ, Heagy M, Bentlage B. Phenotypic plasticity in Cassiopea ornata (Cnidaria: Scyphozoa: Rhizostomeae) suggests environmentally driven morphology. ZOOMORPHOLOGY 2022. [DOI: 10.1007/s00435-022-00558-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Luo Y, Huang L, Lei X, Yu X, Liu C, Jiang L, Sun Y, Cheng M, Gan J, Zhang Y, Zhou G, Liu S, Lian J, Huang H. Light availability regulated by particulate organic matter affects coral assemblages on a turbid fringing reef. MARINE ENVIRONMENTAL RESEARCH 2022; 177:105613. [PMID: 35429821 DOI: 10.1016/j.marenvres.2022.105613] [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: 09/16/2021] [Revised: 12/08/2021] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Recently, increasing evidence suggests that reef-building corals exposed to elevated suspended solids (SS) are largely structured by changes in underwater light availability (ULA). However, there are few direct and quantitative observations in situ support for this hypothesis; in particular, the contribution of SS to the diffuse attenuation coefficient of the photosynthetically active radiation (Kd-PAR) variations is not yet fully understood. Here, we investigated the variations in ULA, the structure of coral assemblages, and the concentration and composition of SS on the Luhuitou fringing reef, Sanya, China. Light attenuation was rapid (Kd-PAR: 0.60 ± 0.39 m-1) resulting in a shallow euphotic depth (Zeu-PAR) (<11 m). Benthic PAR showed significant positive correlations with branching and corymbose corals (e.g. Acropora spp.), while massive and encrusting species (e.g. Porites spp.) dominated the coral communities and showed no significant correlations with PAR. These results indicate that the depth range available for coral growth is shallow and the tolerance to low-light stress differs among coral species. Notably, Kd-PAR showed no significant correlations with the grain size fractions of SS, whereas significant positive correlations were found with its organic fraction content, demonstrating that the light attenuation of SS is mainly regulated by particulate organic matter (POM). Intriguingly, our isotopic evidence revealed that POM concentration contributed the most to changes in Kd-PAR, with its source being slightly less important. Combined, our results highlight ULA regulated by POM is an important factor in contributing to changes in coral assemblages on inshore turbid reefs, and reducing the input of terrestrial materials, especially POM, is an effective measure to alleviate the low-light stress on sensitive coral species.
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Affiliation(s)
- Yong Luo
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lintao Huang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xinming Lei
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Southern Marine Science and Engineering Guangdong Laboratory Guangzhou, Guangzhou, 511458, China
| | - Xiaolei Yu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chengyue Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Southern Marine Science and Engineering Guangdong Laboratory Guangzhou, Guangzhou, 511458, China
| | - Lei Jiang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Southern Marine Science and Engineering Guangdong Laboratory Guangzhou, Guangzhou, 511458, China
| | - Youfang Sun
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Southern Marine Science and Engineering Guangdong Laboratory Guangzhou, Guangzhou, 511458, China
| | - Meng Cheng
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianfeng Gan
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuyang Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Southern Marine Science and Engineering Guangdong Laboratory Guangzhou, Guangzhou, 511458, China
| | - Guowei Zhou
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Southern Marine Science and Engineering Guangdong Laboratory Guangzhou, Guangzhou, 511458, China
| | - Sheng Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Southern Marine Science and Engineering Guangdong Laboratory Guangzhou, Guangzhou, 511458, China
| | - Jiansheng Lian
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Southern Marine Science and Engineering Guangdong Laboratory Guangzhou, Guangzhou, 511458, China
| | - Hui Huang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; CAS-HKUST Sanya Joint Laboratory of Marine Science Research, Key Laboratory of Tropical Marine Biotechnology of Hainan Province, Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China; Sanya National Marine Ecosystem Research Station, Tropical Marine Biological Research Station in Hainan, Chinese Academy of Sciences, Sanya, 572000, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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24
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Rodrigo AP, Lopes A, Pereira R, Anjo SI, Manadas B, Grosso AR, Baptista PV, Fernandes AR, Costa PM. Endogenous Fluorescent Proteins in the Mucus of an Intertidal Polychaeta: Clues for Biotechnology. Mar Drugs 2022; 20:md20040224. [PMID: 35447897 PMCID: PMC9028460 DOI: 10.3390/md20040224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/23/2022] [Accepted: 03/23/2022] [Indexed: 02/04/2023] Open
Abstract
The vast ocean holds many unexplored organisms with unique adaptive features that enable them to thrive in their environment. The secretion of fluorescent proteins is one of them, with reports on the presence of such compounds in marine annelids being scarce. The intertidal Eulalia sp. is an example. The worm secretes copious amounts of mucus, that when purified and concentrated extracts, yield strong fluorescence under UV light. Emission has two main maxima, at 400 nm and at 500 nm, with the latter responsible for the blue–greenish fluorescence. Combining proteomics and transcriptomics techniques, we identified ubiquitin, peroxiredoxin, and 14-3-3 protein as key elements in the mucus. Fluorescence was found to be mainly modulated by redox status and pH, being consistently upheld in extracts prepared in Tris-HCl buffer with reducing agent at pH 7 and excited at 330 nm. One of the proteins associated with the fluorescent signal was localized in secretory cells in the pharynx. The results indicate that the secretion of fluorescent proteinaceous complexes can be an important defense against UV for this dweller. Additionally, the internalization of fluorescent complexes by ovarian cancer cells and modulation of fluorescence of redox status bears important considerations for biotechnological application of mucus components as markers.
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Affiliation(s)
- Ana P. Rodrigo
- UCIBIO—Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (A.L.); (R.P.); (A.R.G.); (P.V.B.); (A.R.F.)
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- Correspondence: (A.P.R.); (P.M.C.); Tel.: +351-212-948-300 (A.P.R. & P.M.C.)
| | - Ana Lopes
- UCIBIO—Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (A.L.); (R.P.); (A.R.G.); (P.V.B.); (A.R.F.)
| | - Ricardo Pereira
- UCIBIO—Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (A.L.); (R.P.); (A.R.G.); (P.V.B.); (A.R.F.)
| | - Sandra I. Anjo
- Center for Neuroscience and Cell Biology, University of Coimbra, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal; (S.I.A.); (B.M.)
| | - Bruno Manadas
- Center for Neuroscience and Cell Biology, University of Coimbra, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal; (S.I.A.); (B.M.)
| | - Ana R. Grosso
- UCIBIO—Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (A.L.); (R.P.); (A.R.G.); (P.V.B.); (A.R.F.)
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Pedro V. Baptista
- UCIBIO—Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (A.L.); (R.P.); (A.R.G.); (P.V.B.); (A.R.F.)
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Alexandra R. Fernandes
- UCIBIO—Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (A.L.); (R.P.); (A.R.G.); (P.V.B.); (A.R.F.)
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Pedro M. Costa
- UCIBIO—Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (A.L.); (R.P.); (A.R.G.); (P.V.B.); (A.R.F.)
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- Correspondence: (A.P.R.); (P.M.C.); Tel.: +351-212-948-300 (A.P.R. & P.M.C.)
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25
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The role of the endolithic alga Ostreobium spp. during coral bleaching recovery. Sci Rep 2022; 12:2977. [PMID: 35194106 PMCID: PMC8863988 DOI: 10.1038/s41598-022-07017-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 01/25/2022] [Indexed: 02/06/2023] Open
Abstract
In this study, we explore how the Caribbean coral Orbicella faveolata recovers after bleaching, using fragments from 13 coral colonies exposed to heat stress (32 °C) for ten days. Biological parameters and coral optical properties were monitored during and after the stress. Increases in both, the excitation pressure over photosystem II (Qm) and pigment specific absorption (a*Chla) were observed in the stressed corals, associated with reductions in light absorption at the chlorophyll a red peak (De675) and symbiont population density. All coral fragments exposed to heat stress bleached but a fraction of the stressed corals recovered after removing the stress, as indicated by the reductions in Qm and increases in De675 and the symbiont population observed. This subsample of the experimentally bleached corals also showed blooms of the endolithic algae Ostreobium spp. underneath the tissue. Using a numerical model, we quantified the amount of incident light reflected by the coral, and absorbed by the different pigmented components: symbionts, host-tissue and Ostreobium spp. Our study supports the key contribution of Ostreobium spp. blooms near the skeletal surface, to coral recovery after bleaching by reducing skeleton reflectance. Endolithic blooms can thus significantly alleviate the high light stress that affects the remaining symbionts during the stress or when the coral has achieved the bleached phenotype.
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26
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Maria M, Al-Razi H, Borzée A, Bin Muzaffar S. Biofluorescence in the herpetofauna of northeast Bangladesh. HERPETOZOA 2022. [DOI: 10.3897/herpetozoa.35.e76225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Fluorescence is a poorly documented phenomenon in vertebrates and has been suggested to play several biological roles. With increased study, the number of species in which biofluorescence has been identified is increasing steadily. We conducted a UV light survey for biofluorescence in the herpetofauna in Lawachara National Park, Bangladesh and found biofluorescence in one amphibian (Microhyla berdmorei) and three reptile species (Boiga cyanea, Cyrtodactylus tripuraensis and Hemidactylus platyurus).
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27
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Impacts of ocean warming and acidification on calcifying coral reef taxa: mechanisms responsible and adaptive capacity. Emerg Top Life Sci 2022; 6:1-9. [PMID: 35157039 DOI: 10.1042/etls20210226] [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: 10/20/2021] [Revised: 01/24/2022] [Accepted: 01/26/2022] [Indexed: 11/17/2022]
Abstract
Ocean warming (OW) and acidification (OA) are two of the greatest global threats to the persistence of coral reefs. Calcifying reef taxa such as corals and coralline algae provide the essential substrate and habitat in tropical reefs but are at particular risk due to their susceptibility to both OW and OA. OW poses the greater threat to future reef growth and function, via its capacity to destabilise the productivity of both taxa, and to cause mass bleaching events and mortality of corals. Marine heatwaves are projected to increase in frequency, intensity, and duration over the coming decades, raising the question of whether coral reefs will be able to persist as functioning ecosystems and in what form. OA should not be overlooked, as its negative impacts on the calcification of reef-building corals and coralline algae will have consequences for global reef accretion. Given that OA can have negative impacts on the reproduction and early life stages of both coralline algae and corals, the interdependence of these taxa may result in negative feedbacks for reef replenishment. However, there is little evidence that OA causes coral bleaching or exacerbates the effects of OW on coral bleaching. Instead, there is some evidence that OA alters the photo-physiology of both taxa. Tropical coralline algal possess shorter generation times than corals, which could enable more rapid evolutionary responses. Future reefs will be dominated by taxa with shorter generation times and high plasticity, or those individuals inherently resistant and resilient to both marine heatwaves and OA.
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28
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Kaniewska P, Sampayo EM. Macro- and micro-scale adaptations allow distinct Stylophora pistillata-symbiodiniaceae holobionts to optimize performance across a broad light habitat. JOURNAL OF PHYCOLOGY 2022; 58:55-70. [PMID: 34612522 DOI: 10.1111/jpy.13215] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 08/29/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
In sessile organisms, phenotypic plasticity represents an important strategy for dealing with environmental variability. Here we test if phenotypic plasticity enables the common coral Stylophora pistillata to occupy a broad niche. We find clear differences in the photo-physiology of four putative species of photosynthetic dinoflagellate symbionts associated with the coral S. pistillata, namely, Cladocopium 'C35a', 'C79', 'C78a' and 'C8a'. Coral phenotypic responses were also tightly linked to symbiont identity. Corals with Cladocopium 'C8a' have more "open" macro-morphology compared to colonies associating with depth-restricted Cladocopium 'C35a' or 'C78a' in the same shallow water habitat. Corals with Cladocopium 'C8a' had 40 to 60% lower symbiont cell densities compared to other holobionts but were more efficient at acclimating over a range of light levels, with clear mechanisms to dissipate excess light energy. This holobiont contains host-based green fluorescent pigments, increased concentrations of symbiont-based mycosporine amino acids, and xanthophyll cycling in high light habitats. Photosynthetic efficiency was also adjusted over the light habitat. In contrast, limited micro-scale responses were observed between three depth-restricted symbionts: Cladocopium 'C79', 'C35a', and 'C78a'. To optimize light levels reaching the photosynthetic unit, these colonies rely on a more closed macro-morphology under high light levels, which reduces incident light levels by up to 43%, and higher symbiont densities . Our results show that distinct macro- and micro-scale adaptations lead to functional differences between four distinct S. pistillata holobionts, allowing them to co-exist by filling specific niches on a small, but environmentally diverse, spatial scale. Key index words: Light, Symbiodiniaceae, coral, pigments, Stylophora pistillata, ITS2, phenotypic plasticity, niche diversification.
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Affiliation(s)
- Paulina Kaniewska
- School of Biological Sciences, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Eugenia M Sampayo
- ARC Centre of Excellence for Coral Reef Studies, School of Biological Sciences, The University of Queensland, St. Lucia, Queensland, 4072, Australia
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29
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Aging and Light Stress Result in Overlapping and Unique Gene Expression Changes in Photoreceptors. Genes (Basel) 2022; 13:genes13020264. [PMID: 35205309 PMCID: PMC8872477 DOI: 10.3390/genes13020264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 01/26/2022] [Accepted: 01/28/2022] [Indexed: 11/20/2022] Open
Abstract
Advanced age is one of the leading risk factors for vision loss and eye disease. Photoreceptors are the primary sensory neurons of the eye. The extended photoreceptor cell lifespan, in addition to its high metabolic needs due to phototransduction, makes it critical for these neurons to continually respond to the stresses associated with aging by mounting an appropriate gene expression response. Here, we sought to untangle the more general neuronal age-dependent transcriptional signature of photoreceptors with that induced by light stress. To do this, we aged flies or exposed them to various durations of blue light, followed by photoreceptor nuclei-specific transcriptome profiling. Using this approach, we identified genes that are both common and uniquely regulated by aging and light induced stress. Whereas both age and blue light induce expression of DNA repair genes and a neuronal-specific signature of death, both conditions result in downregulation of phototransduction. Interestingly, blue light uniquely induced genes that directly counteract the overactivation of the phototransduction signaling cascade. Lastly, unique gene expression changes in aging photoreceptors included the downregulation of genes involved in membrane potential homeostasis and mitochondrial function, as well as the upregulation of immune response genes. We propose that light stress contributes to the aging transcriptome of photoreceptors, but that there are also other environmental or intrinsic factors involved in age-associated photoreceptor gene expression signatures.
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Shinzato C, Takeuchi T, Yoshioka Y, Tada I, Kanda M, Broussard C, Iguchi A, Kusakabe M, Marin F, Satoh N, Inoue M. Whole-Genome Sequencing Highlights Conservative Genomic Strategies of a Stress-Tolerant, Long-Lived Scleractinian Coral, Porites australiensis Vaughan, 1918. Genome Biol Evol 2021; 13:6456307. [PMID: 34878117 PMCID: PMC8691061 DOI: 10.1093/gbe/evab270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/01/2021] [Indexed: 12/13/2022] Open
Abstract
Massive corals of the genus Porites, common, keystone reef builders in the Indo-Pacific Ocean, are distinguished by their relative stress tolerance and longevity. In order to identify genetic bases of these attributes, we sequenced the complete genome of a massive coral, Porites australiensis. We developed a genome assembly and gene models of comparable quality to those of other coral genomes. Proteome analysis identified 60 Porites skeletal matrix protein genes, all of which show significant similarities to genes from other corals and even to those from a sea anemone, which has no skeleton. Nonetheless, 30% of its skeletal matrix proteins were unique to Porites and were not present in the skeletons of other corals. Comparative genomic analyses showed that genes widely conserved among other organisms are selectively expanded in Porites. Specifically, comparisons of transcriptomic responses of P. australiensis and Acropora digitifera, a stress-sensitive coral, reveal significant differences in regard to genes that respond to increased water temperature, and some of the genes expanded exclusively in Porites may account for the different thermal tolerances of these corals. Taken together, widely shared genes may have given rise to unique biological characteristics of Porites, massive skeletons and stress tolerance.
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Affiliation(s)
- Chuya Shinzato
- Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Takeshi Takeuchi
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Yuki Yoshioka
- Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba, Japan.,Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Ipputa Tada
- Department of Genetics, SOKENDAI (Graduate University for Advanced Studies), Mishima, Shizuoka, Japan
| | - Miyuki Kanda
- DNA Sequencing Section, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | | | - Akira Iguchi
- Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
| | | | - Frédéric Marin
- Biogéosciences, Bâtiment des Sciences Gabriel, Université de Bourgogne, Dijon, France
| | - Noriyuki Satoh
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Mayuri Inoue
- Division of Earth Science, Graduate School of Natural Science and Technology, Okayama University, Japan
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31
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Abraham RE, Alghazwi M, Liang Q, Zhang W. Advances on marine-derived natural radioprotection compounds: historic development and future perspective. MARINE LIFE SCIENCE & TECHNOLOGY 2021; 3:474-487. [PMID: 37073261 PMCID: PMC10077276 DOI: 10.1007/s42995-021-00095-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 12/23/2020] [Indexed: 05/03/2023]
Abstract
Natural extracts and compounds from marine resources have gained intensive scientific and industry attention for radioprotective activities in the past ten years. However, the marine-derived radioprotectants have been studied against UV-rays, gamma (γ)-rays and X-rays for more than 30 years. This review aims to identify key marine-derived extracts/compounds and their modes of action studied for radioprotective activities from 1986 to 2019. A comprehensive survey was conducted to establish the trend in terms of the publications each year and the countries of origin. A total of 40 extracts and 34 natural compounds showing radioprotective activities against UV-rays, gamma (γ)-rays and X-rays were identified from a range of marine plants and animals. These extracts and compounds are broadly categorized into polysaccharides, phlorotannins, carotenoids and mycosporine-like amino acids (MAAs). Macroalgae and microalgae were found to be the dominant sources of polysaccharides, phlorotannins and carotenoids. MAAs were mainly identified in algae, sponges, sea cucumber and corals that showed significant UV-absorbing activities. A number of radioprotective mechanisms were shown by these compounds, predominantly free radicals scavenging, inhibition of apoptosis, UV-ray absorption and DNA damage-repair signaling pathways. While these bio-discoveries warrant further investigation and development of radioprotective therapeutics, however, the lack of clinical studies is a major obstacle to be tackled in the future. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-021-00095-x.
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Affiliation(s)
- Reinu E. Abraham
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA 5042 Australia
| | - Mousa Alghazwi
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA 5042 Australia
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | - Qi Liang
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA 5042 Australia
- Shanxi University of Traditional Chinese Medicine, Taiyuan, 030619 China
| | - Wei Zhang
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA 5042 Australia
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Sulatskaya AI, Kosolapova AO, Bobylev AG, Belousov MV, Antonets KS, Sulatsky MI, Kuznetsova IM, Turoverov KK, Stepanenko OV, Nizhnikov AA. β-Barrels and Amyloids: Structural Transitions, Biological Functions, and Pathogenesis. Int J Mol Sci 2021; 22:11316. [PMID: 34768745 PMCID: PMC8582884 DOI: 10.3390/ijms222111316] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/15/2021] [Accepted: 10/18/2021] [Indexed: 01/17/2023] Open
Abstract
Insoluble protein aggregates with fibrillar morphology called amyloids and β-barrel proteins both share a β-sheet-rich structure. Correctly folded β-barrel proteins can not only function in monomeric (dimeric) form, but also tend to interact with one another-followed, in several cases, by formation of higher order oligomers or even aggregates. In recent years, findings proving that β-barrel proteins can adopt cross-β amyloid folds have emerged. Different β-barrel proteins were shown to form amyloid fibrils in vitro. The formation of functional amyloids in vivo by β-barrel proteins for which the amyloid state is native was also discovered. In particular, several prokaryotic and eukaryotic proteins with β-barrel domains were demonstrated to form amyloids in vivo, where they participate in interspecies interactions and nutrient storage, respectively. According to recent observations, despite the variety of primary structures of amyloid-forming proteins, most of them can adopt a conformational state with the β-barrel topology. This state can be intermediate on the pathway of fibrillogenesis ("on-pathway state"), or can be formed as a result of an alternative assembly of partially unfolded monomers ("off-pathway state"). The β-barrel oligomers formed by amyloid proteins possess toxicity, and are likely to be involved in the development of amyloidoses, thus representing promising targets for potential therapy of these incurable diseases. Considering rapidly growing discoveries of the amyloid-forming β-barrels, we may suggest that their real number and diversity of functions are significantly higher than identified to date, and represent only "the tip of the iceberg". Here, we summarize the data on the amyloid-forming β-barrel proteins, their physicochemical properties, and their biological functions, and discuss probable means and consequences of the amyloidogenesis of these proteins, along with structural relationships between these two widespread types of β-folds.
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Affiliation(s)
- Anna I. Sulatskaya
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology, 3 Podbelskogo Sh., Pushkin, 196608 St. Petersburg, Russia; (A.I.S.); (A.O.K.); (M.V.B.); (K.S.A.)
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Av., 194064 St. Petersburg, Russia; (I.M.K.); (K.K.T.); (O.V.S.)
| | - Anastasiia O. Kosolapova
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology, 3 Podbelskogo Sh., Pushkin, 196608 St. Petersburg, Russia; (A.I.S.); (A.O.K.); (M.V.B.); (K.S.A.)
- Faculty of Biology, St. Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia
| | - Alexander G. Bobylev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, 3 Institutskaya St., 142290 Moscow, Russia;
| | - Mikhail V. Belousov
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology, 3 Podbelskogo Sh., Pushkin, 196608 St. Petersburg, Russia; (A.I.S.); (A.O.K.); (M.V.B.); (K.S.A.)
- Faculty of Biology, St. Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia
| | - Kirill S. Antonets
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology, 3 Podbelskogo Sh., Pushkin, 196608 St. Petersburg, Russia; (A.I.S.); (A.O.K.); (M.V.B.); (K.S.A.)
- Faculty of Biology, St. Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia
| | - Maksim I. Sulatsky
- Laboratory of Cell Morphology, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Av., 194064 St. Petersburg, Russia;
| | - Irina M. Kuznetsova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Av., 194064 St. Petersburg, Russia; (I.M.K.); (K.K.T.); (O.V.S.)
| | - Konstantin K. Turoverov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Av., 194064 St. Petersburg, Russia; (I.M.K.); (K.K.T.); (O.V.S.)
| | - Olesya V. Stepanenko
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Av., 194064 St. Petersburg, Russia; (I.M.K.); (K.K.T.); (O.V.S.)
| | - Anton A. Nizhnikov
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology, 3 Podbelskogo Sh., Pushkin, 196608 St. Petersburg, Russia; (A.I.S.); (A.O.K.); (M.V.B.); (K.S.A.)
- Faculty of Biology, St. Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia
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Cox KD, Woods MB, Reimchen TE. Regional heterogeneity in coral species richness and hue reveals novel global predictors of reef fish intra-family diversity. Sci Rep 2021; 11:18275. [PMID: 34521952 PMCID: PMC8440613 DOI: 10.1038/s41598-021-97862-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 08/31/2021] [Indexed: 02/08/2023] Open
Abstract
Habitat heterogeneity shapes biological communities, a well-known process in terrestrial ecosystems but substantially unresolved within coral reef ecosystems. We investigated the extent to which coral richness predicts intra-family fish richness, while simultaneously integrating a striking aspect of reef ecosystems-coral hue. To do so, we quantified the coral richness, coral hue diversity, and species richness within 25 fish families in 74 global ecoregions. We then expanded this to an analysis of all reef fishes (4465 species). Considering coral bleaching as a natural experiment, we subsequently examined hue's contribution to fish communities. Coral species and hue diversity significantly predict each family's fish richness, with the highest correlations (> 80%) occurring in damselfish, butterflyfish, emperors and rabbitfish, lower (60-80%) in substrate-bound and mid-water taxa such as blennies, seahorses, and parrotfish, and lowest (40-60%) in sharks, morays, grunts and triggerfish. The observed trends persisted globally. Coral bleaching's homogenization of reef colouration revealed hue's contribution to maintaining fish richness, abundance, and recruit survivorship. We propose that each additional coral species and associated hue provide added ecological opportunities (e.g. camouflage, background contrast for intraspecific display), facilitating the evolution and co-existence of diverse fish assemblages.
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Affiliation(s)
- Kieran D Cox
- Department of Biology, University of Victoria, Cunningham 202, 3800 Finnerty Road, Victoria, BC, V8P 5C2, Canada.
- Hakai Institute, Heriot Bay, BC, V0P 1H0, Canada.
| | - Mackenzie B Woods
- Department of Biology, University of Victoria, Cunningham 202, 3800 Finnerty Road, Victoria, BC, V8P 5C2, Canada
| | - Thomas E Reimchen
- Department of Biology, University of Victoria, Cunningham 202, 3800 Finnerty Road, Victoria, BC, V8P 5C2, Canada.
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Taylor Parkins SK, Murthy S, Picioreanu C, Kühl M. Multiphysics modelling of photon, mass and heat transfer in coral microenvironments. J R Soc Interface 2021; 18:20210532. [PMID: 34465209 PMCID: PMC8437025 DOI: 10.1098/rsif.2021.0532] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Coral reefs are constructed by calcifying coral animals that engage in a symbiosis with dinoflagellate microalgae harboured in their tissue. The symbiosis takes place in the presence of steep and dynamic gradients of light, temperature and chemical species that are affected by the structural and optical properties of the coral and their interaction with incident irradiance and water flow. Microenvironmental analyses have enabled quantification of such gradients and bulk coral tissue and skeleton optical properties, but the multi-layered nature of corals and its implications for the optical, thermal and chemical microenvironment remains to be studied in more detail. Here, we present a multiphysics modelling approach, where three-dimensional Monte Carlo simulations of the light field in a simple coral slab morphology with multiple tissue layers were used as input for modelling the heat dissipation and photosynthetic oxygen production driven by photon absorption. By coupling photon, heat and mass transfer, the model predicts light, temperature and O2 gradients in the coral tissue and skeleton, under environmental conditions simulating, for example, tissue contraction/expansion, symbiont loss via coral bleaching or different distributions of coral host pigments. The model reveals basic structure-function mechanisms that shape the microenvironment and ecophysiology of the coral symbiosis in response to environmental change.
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Affiliation(s)
- Shannara Kayleigh Taylor Parkins
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands.,The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kemitorvet 220, 2800 Kgs. Lyngby, Denmark
| | - Swathi Murthy
- Marine Biology Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
| | - Cristian Picioreanu
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands.,Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Michael Kühl
- Marine Biology Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark.,Climate Change Cluster, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
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35
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Krasowska J, Pierzchała K, Bzowska A, Forró L, Sienkiewicz A, Wielgus-Kutrowska B. Chromophore of an Enhanced Green Fluorescent Protein Can Play a Photoprotective Role Due to Photobleaching. Int J Mol Sci 2021; 22:ijms22168565. [PMID: 34445269 PMCID: PMC8395242 DOI: 10.3390/ijms22168565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/03/2021] [Accepted: 08/04/2021] [Indexed: 11/16/2022] Open
Abstract
Under stress conditions, elevated levels of cellular reactive oxygen species (ROS) may impair crucial cellular structures. To counteract the resulting oxidative damage, living cells are equipped with several defense mechanisms, including photoprotective functions of specific proteins. Here, we discuss the plausible ROS scavenging mechanisms by the enhanced green fluorescent protein, EGFP. To check if this protein could fulfill a photoprotective function, we employed electron spin resonance (ESR) in combination with spin-trapping. Two organic photosensitizers, rose bengal and methylene blue, as well as an inorganic photocatalyst, nano-TiO2, were used to photogenerate ROS. Spin-traps, TMP-OH and DMPO, and a nitroxide radical, TEMPOL, served as molecular targets for ROS. Our results show that EGFP quenches various forms of ROS, including superoxide radicals and singlet oxygen. Compared to the three proteins PNP, papain, and BSA, EGFP revealed high ROS quenching ability, which suggests its photoprotective role in living systems. Damage to the EGFP chromophore was also observed under strong photo-oxidative conditions. This study contributes to the discussion on the protective function of fluorescent proteins homologous to the green fluorescent protein (GFP). It also draws attention to the possible interactions of GFP-like proteins with ROS in systems where such proteins are used as biological markers.
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Affiliation(s)
- Joanna Krasowska
- Division of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland; (J.K.); (A.B.)
| | - Katarzyna Pierzchała
- Laboratory for Functional and Metabolic Imaging (LIFMET), Institute of Physics (IPHYS), School of Basic Sciences (SB), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;
- Laboratory of Physics of Complex Matter (LPMC), Institute of Physics (IPHYS), School of Basic Sciences (SB), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;
| | - Agnieszka Bzowska
- Division of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland; (J.K.); (A.B.)
| | - László Forró
- Laboratory of Physics of Complex Matter (LPMC), Institute of Physics (IPHYS), School of Basic Sciences (SB), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;
| | - Andrzej Sienkiewicz
- Laboratory of Physics of Complex Matter (LPMC), Institute of Physics (IPHYS), School of Basic Sciences (SB), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;
- Laboratory for Quantum Magnetism (LQM), Institute of Physics (IPHYS), School of Basic Sciences (SB), École Polytechnique Fédérale de Lausanne (EPFL), Station 3, CH-1015 Lausanne, Switzerland
- ADSresonances, Route de Genève 60B, CH-1028 Préverenges, Switzerland
- Correspondence: (A.S.); (B.W.-K.)
| | - Beata Wielgus-Kutrowska
- Division of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland; (J.K.); (A.B.)
- Correspondence: (A.S.); (B.W.-K.)
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36
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Daney de Marcillac W, Nguyen LTP, Aracheloff C, Berthier S, Schöllhorn B. Bright green fluorescence of Asian paper wasp nests. J R Soc Interface 2021; 18:20210418. [PMID: 34428946 PMCID: PMC8385335 DOI: 10.1098/rsif.2021.0418] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/02/2021] [Indexed: 12/29/2022] Open
Abstract
An exceptionally bright fluorescent biomatter was discovered when exploring, with UV-A light, the nests of several oriental paper wasp species of the genus Polistes, a genus of diurnal social insects. Fluorescence spectra of the cocoon cap membranes revealed narrow emission bands in the green range of the visible spectrum. Large Stokes shifts of around 160 nm and high fluorescence quantum yields of up to 35% were measured. Transmission spectra were recorded in order to estimate the contribution of the fluorescence to the visible light transmitted through the cocoon cap membrane. The nest fluorescence of the Vietnamese wasps was compared with a European and an American species. Potential biological functions of these interesting fluorescence properties of the studied biomaterial are discussed. The discovery of this striking example of a fluorescent terrestrial biomaterial may contribute to the debate on adaptive biological functions of natural fluorescence and falls in line with the growing interest in biodiversity and bio-inspiration.
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Affiliation(s)
| | - Lien Thi Phuong Nguyen
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Nghia Do, Cau Giay, Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Nghia Do, Cau Giay, Hanoi, Vietnam
| | - Camille Aracheloff
- Institut des Nanoscience de Paris, UMR 7588 CNRS - Sorbonne Université, Paris, France
| | - Serge Berthier
- Institut des Nanoscience de Paris, UMR 7588 CNRS - Sorbonne Université, Paris, France
| | - Bernd Schöllhorn
- Université de Paris - Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France
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37
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Dellisanti W, Chung JTH, Chow CFY, Wu J, Wells ML, Chan LL. Experimental Techniques to Assess Coral Physiology in situ Under Global and Local Stressors: Current Approaches and Novel Insights. Front Physiol 2021; 12:656562. [PMID: 34163371 PMCID: PMC8215126 DOI: 10.3389/fphys.2021.656562] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/09/2021] [Indexed: 11/19/2022] Open
Abstract
Coral reefs are declining worldwide due to global changes in the marine environment. The increasing frequency of massive bleaching events in the tropics is highlighting the need to better understand the stages of coral physiological responses to extreme conditions. Moreover, like many other coastal regions, coral reef ecosystems are facing additional localized anthropogenic stressors such as nutrient loading, increased turbidity, and coastal development. Different strategies have been developed to measure the health status of a damaged reef, ranging from the resolution of individual polyps to the entire coral community, but techniques for measuring coral physiology in situ are not yet widely implemented. For instance, while there are many studies of the coral holobiont response in single or limited-number multiple stressor experiments, they provide only partial insights into metabolic performance under more complex and temporally and spatially variable natural conditions. Here, we discuss the current status of coral reefs and their global and local stressors in the context of experimental techniques that measure core processes in coral metabolism (respiration, photosynthesis, and biocalcification) in situ, and their role in indicating the health status of colonies and communities. We highlight the need to improve the capability of in situ studies in order to better understand the resilience and stress response of corals under multiple global and local scale stressors.
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Affiliation(s)
- Walter Dellisanti
- State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, China.,Department of Biomedical Sciences, City University of Hong Kong, Kowloon, China
| | - Jeffery T H Chung
- State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, China
| | - Cher F Y Chow
- State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, China.,Centre for Biological Diversity, Scottish Oceans Institute, School of Biology, University of St Andrews, St Andrews, United Kingdom
| | - Jiajun Wu
- State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, China
| | - Mark L Wells
- School of Marine Sciences, University of Maine, Orono, ME, United States.,State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - Leo L Chan
- State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, China.,Department of Biomedical Sciences, City University of Hong Kong, Kowloon, China.,Hong Kong Branch of Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
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38
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Protasova EA, Mishin AS, Lukyanov KA, Maksimov EG, Bogdanov AM. Chromophore reduction plus reversible photobleaching: how the mKate2 "photoconversion" works. Photochem Photobiol Sci 2021; 20:791-803. [PMID: 34085171 DOI: 10.1007/s43630-021-00060-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/25/2021] [Indexed: 10/21/2022]
Abstract
mKate red-to-green photoconversion is a non-canonical type of phototransformation in fluorescent proteins, with a poorly understood mechanism. We have hypothesized that the daughter mKate2 protein may also be photoconvertible, and that this phenomenon would be connected with mKate(2) chromophore photoreduction. Indeed, upon the intense irradiation of the protein sample supplemented by sodium dithionite, the accumulation of green as well as blue spectral forms is enhanced. The reaction was shown to be reversible upon the reductant's removal. However, an analysis of the fluorescence microscopy data, absorption spectra, kinetics and time-resolved fluorescence spectroscopy revealed that the short-wavelength spectral forms of mKate(2) exist before photoactivation, that their fractions increase light-independently after dithionite addition, and that the conversion is facilitated by the photobleaching of the red chromophore form.
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Affiliation(s)
- Elena A Protasova
- Faculty of Biology, Lomonosov Moscow State University, 119992, Moscow, Russia
| | - Alexander S Mishin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997, Moscow, Russia
| | | | - Eugene G Maksimov
- Faculty of Biology, Lomonosov Moscow State University, 119992, Moscow, Russia
| | - Alexey M Bogdanov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997, Moscow, Russia.
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39
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Ramírez-Lugo JS, Toledo-Hernández C, Vélez-González I, Ruiz-Diaz CP. CREARE: A Course-Based Undergraduate Research Experience To Study the Responses of the Endangered Coral Acropora cervicornis to a Changing Environment. JOURNAL OF MICROBIOLOGY & BIOLOGY EDUCATION 2021; 22:jmbe-22-68. [PMID: 33953818 PMCID: PMC8060141 DOI: 10.1128/jmbe.v22i1.2253c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 02/20/2021] [Indexed: 06/12/2023]
Abstract
There is mounting evidence to support that students who participate in scientific research experiences are more likely to continue on to advanced degrees and careers in science, technology, engineering, and mathematics (STEM). To introduce more students to the benefits of research, we have drawn on an ongoing project aimed at understanding how the Caribbean staghorn coral Acropora cervicornis responds to environmental fluctuations to develop a semester-long course-based undergraduate research experience (CURE), entitled CREARE (Coral Response to Environment Authentic Research Experience). The main mode of instruction in CREARE is through topic modules, and course evaluation is achieved through writing assignments. Students in CREARE perform experiments in the laboratory to measure the abundance of photo-protective proteins in coral tissue from samples collected at different depths and at different times of the year and analyze environmental data using the R programming language. CREARE participants have contributed to the progress of the research project by generating novel data and making improvements to experimental protocols. Furthermore, pre- and post-course assessment of content knowledge revealed that students perform significantly better on a written exam after participating in CREARE, while also displaying appreciable shifts in attitudes towards science in student perception surveys. In addition, through qualitative analysis of focus group interviews, we gathered evidence to suggest that mediating variables that predict students' persistence in science are bolstered through our application of the CURE modality. Overall, CREARE can serve as a model for developing more research-based courses that successfully engage students in scientific research.
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Affiliation(s)
- Juan S. Ramírez-Lugo
- Department of Biology, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico
| | | | - Ivonne Vélez-González
- Department of Graduate Studies, School of Education, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico
| | - Claudia P. Ruiz-Diaz
- Sociedad Ambiente Marino, San Juan, Puerto Rico
- Department of Environmental Sciences, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico
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40
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Kashimoto R, Hisata K, Shinzato C, Satoh N, Shoguchi E. Expansion and Diversification of Fluorescent Protein Genes in Fifteen Acropora Species during the Evolution of Acroporid Corals. Genes (Basel) 2021; 12:genes12030397. [PMID: 33799612 PMCID: PMC8001845 DOI: 10.3390/genes12030397] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 11/16/2022] Open
Abstract
In addition to a purple, non-fluorescent chromoprotein (ChrP), fluorescent proteins (FPs) account for the vivid colors of corals, which occur in green (GFP), cyan (CFP), and red (RFP) FPs. To understand the evolution of the coral FP gene family, we examined the genomes of 15 Acropora species and three confamilial taxa. This genome-wide survey identified 219 FP genes. Molecular phylogeny revealed that the 15 Acropora species each have 9–18 FP genes, whereas the other acroporids examined have only two, suggesting a pronounced expansion of the FP genes in the genus Acropora. The data estimates of FP gene duplication suggest that the last common ancestor of the Acropora species that survived in the period of high sea surface temperature (Paleogene period) has already gained 16 FP genes. Different evolutionary histories of lineage-specific duplication and loss were discovered among GFP/CFPs, RFPs, and ChrPs. Synteny analysis revealed core GFP/CFP, RFP, and ChrP gene clusters, in which a tandem duplication of the FP genes was evident. The expansion and diversification of Acropora FPs may have contributed to the present-day richness of this genus.
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Affiliation(s)
- Rio Kashimoto
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan; (K.H.); (N.S.); (E.S.)
- Correspondence:
| | - Kanako Hisata
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan; (K.H.); (N.S.); (E.S.)
| | - Chuya Shinzato
- Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba 277-8564, Japan;
| | - Noriyuki Satoh
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan; (K.H.); (N.S.); (E.S.)
| | - Eiichi Shoguchi
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan; (K.H.); (N.S.); (E.S.)
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41
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Satoh N, Kinjo K, Shintaku K, Kezuka D, Ishimori H, Yokokura A, Hagiwara K, Hisata K, Kawamitsu M, Koizumi K, Shinzato C, Zayasu Y. Color morphs of the coral, Acropora tenuis, show different responses to environmental stress and different expression profiles of fluorescent-protein genes. G3 (BETHESDA, MD.) 2021; 11:jkab018. [PMID: 33621334 PMCID: PMC8022974 DOI: 10.1093/g3journal/jkab018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 01/06/2021] [Indexed: 11/21/2022]
Abstract
Corals of the family Acroporidae are key structural components of reefs that support the most diverse marine ecosystems. Due to increasing anthropogenic stresses, coral reefs are in decline. Along the coast of Okinawa, Japan, three different color morphs of Acropora tenuis have been recognized for decades. These include brown (N morph), yellow green (G), and purple (P) forms. The tips of axial polyps of each morph exhibit specific fluorescence spectra. This attribute is inherited asexually, and color morphs do not change seasonally. In Okinawa Prefecture, during the summer of 2017, N and P morphs experienced bleaching, in which many N morphs died. Dinoflagellates (Symbiodiniaceae) are essential partners of scleractinian corals, and photosynthetic activity of symbionts was reduced in N and P morphs. In contrast, G morphs successfully withstood the stress. Examination of the clade and type of Symbiodiniaceae indicated that the three color-morphs host similar sets of Clade-C symbionts, suggesting that beaching of N and P morphs is unlikely attributable to differences in the clade of Symbiodiniaceae the color morphs hosted. Fluorescent proteins play pivotal roles in physiological regulation of corals. Since the A. tenuis genome has been decoded, we identified five genes for green fluorescent proteins (GFPs), two for cyan fluorescent proteins (CFPs), three for red fluorescent proteins (RFPs), and seven genes for chromoprotein (ChrP). A summer survey of gene expression profiles under outdoor aquarium conditions demonstrated that (a) expression of CFP and REP was quite low during the summer in all three morphs, (b) P morphs expressed higher levels of ChrP than N and G morphs, (c) both N and G morphs expressed GFP more highly than P morphs, and (d) GFP expression in N morphs was reduced during summer whereas G morphs maintained high levels of GFP expression throughout the summer. Although further studies are required to understand the biological significance of these color morphs of A. tenuis, our results suggest that thermal stress resistance is modified by genetic mechanisms that coincidentally lead to diversification of color morphs of this coral.
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Affiliation(s)
- Noriyuki Satoh
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
| | - Koji Kinjo
- Umino-Tane Co. Ltd, Okinawa 905-0888, Japan
| | - Kohei Shintaku
- IDEA Consultants, Inc., Okinawa Branch Office, Okinawa 900-0003, Japan
| | - Daisuke Kezuka
- IDEA Consultants, Inc., Okinawa Branch Office, Okinawa 900-0003, Japan
| | - Hiroo Ishimori
- IDEA Consultants, Inc., Okinawa Branch Office, Okinawa 900-0003, Japan
| | - Atsushi Yokokura
- IDEA Consultants, Inc., Institute of Environmental Informatics, Kanagawa 224-0025, Japan
| | | | - Kanako Hisata
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
| | - Mayumi Kawamitsu
- DNA Sequencing Section, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
| | - Koji Koizumi
- Imaging Section, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
| | - Chuya Shinzato
- Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba 277-8564, Japan
| | - Yuna Zayasu
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
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42
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Liang Y, Yu K, Pan Z, Qin Z, Liao Z, Chen B, Huang X, Xu L. Intergeneric and geomorphological variations in Symbiodiniaceae densities of reef-building corals in an isolated atoll, central South China Sea. MARINE POLLUTION BULLETIN 2021; 163:111946. [PMID: 33360728 DOI: 10.1016/j.marpolbul.2020.111946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 12/04/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
The healthy status of corals in the isolated atolls of the central South China Sea (SCS) remains unclear. Symbiodiniaceae density (SD) can effectively reflect the thermal tolerance and health of hard corals. Here, the SDs of 238 samples from the Huangyan Atoll (HA) were analyzed. The results revealed significantly intergeneric and geomorphological differences in SD. Intergeneric variation may reflect that corals with high SD have stronger thermal tolerance. Geomorphic analysis showed that the SDs at the outer reef slope were higher than in the lagoon. Hydrodynamics and sea surface temperature were likely the main influencing factors. Most notably, corals in SCS HA had higher SDs than those at neighboring reefs, indicating that their thermal tolerance were strong, which may be related to HA's local upwelling. These results suggest that the HA has the potential to serve as a refuge for corals, but increasing human disturbance limit its function.
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Affiliation(s)
- Yanting Liang
- Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530004, China; School of Marine Sciences, Guangxi University, Nanning 530004, China
| | - Kefu Yu
- Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530004, China; School of Marine Sciences, Guangxi University, Nanning 530004, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China.
| | - Ziliang Pan
- Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530004, China; School of Marine Sciences, Guangxi University, Nanning 530004, China
| | - Zhenjun Qin
- Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530004, China; School of Marine Sciences, Guangxi University, Nanning 530004, China
| | - Zhiheng Liao
- Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530004, China; School of Marine Sciences, Guangxi University, Nanning 530004, China
| | - Biao Chen
- Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530004, China; School of Marine Sciences, Guangxi University, Nanning 530004, China
| | - Xueyong Huang
- Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530004, China; School of Marine Sciences, Guangxi University, Nanning 530004, China
| | - Lijia Xu
- South China Institute of Environmental Sciences, the Ministry of Ecology and Environment of PRC, Guangzhou 510530, China
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43
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Sivaguru M, Todorov LG, Miller CAH, Fouke CE, Munro CMO, Fouke KW, Fouke KE, Baughman ME, Fouke BW. Corals regulate the distribution and abundance of Symbiodiniaceae and biomolecules in response to changing water depth and sea surface temperature. Sci Rep 2021; 11:2230. [PMID: 33500473 PMCID: PMC7838310 DOI: 10.1038/s41598-021-81520-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 01/06/2021] [Indexed: 12/13/2022] Open
Abstract
The Scleractinian corals Orbicella annularis and O. faveolata have survived by acclimatizing to environmental changes in water depth and sea surface temperature (SST). However, the complex physiological mechanisms by which this is achieved remain only partially understood, limiting the accurate prediction of coral response to future climate change. This study quantitatively tracks spatial and temporal changes in Symbiodiniaceae and biomolecule (chromatophores, calmodulin, carbonic anhydrase and mucus) abundance that are essential to the processes of acclimatization and biomineralization. Decalcified tissues from intact healthy Orbicella biopsies, collected across water depths and seasonal SST changes on Curaçao, were analyzed with novel autofluorescence and immunofluorescence histology techniques that included the use of custom antibodies. O. annularis at 5 m water depth exhibited decreased Symbiodiniaceae and increased chromatophore abundances, while O. faveolata at 12 m water depth exhibited inverse relationships. Analysis of seasonal acclimatization of the O. faveolata holobiont in this study, combined with previous reports, suggests that biomolecules are differentially modulated during transition from cooler to warmer SST. Warmer SST was also accompanied by decreased mucus production and decreased Symbiodiniaceae abundance, which is compensated by increased photosynthetic activity enhanced calcification. These interacting processes have facilitated the remarkable resiliency of the corals through geological time.
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Affiliation(s)
- Mayandi Sivaguru
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Carl Zeiss Labs@Location Partner, Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
| | - Lauren G Todorov
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Carly A H Miller
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Courtney E Fouke
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Department of Biology, Denison University, Granville, OH, USA
| | - Cara M O Munro
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Department of Ecology and Evolutionary Biology, University of California at Santa Cruz, Santa Cruz, CA, USA
| | - Kyle W Fouke
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX, USA
| | - Kaitlyn E Fouke
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Department of Biology, Denison University, Granville, OH, USA
- The Eugene Bell Center for Regenerative Biology and Tissue Engineering, Marine Biological Laboratory, Woods Hole, MA, USA
| | - Melinda E Baughman
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Bruce W Fouke
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Carl Zeiss Labs@Location Partner, Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Department of Evolution, Ecology and Behavior, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Roy J. Carver Biotechnology Center, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
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Prötzel D, Heß M, Schwager M, Glaw F, Scherz MD. Neon-green fluorescence in the desert gecko Pachydactylus rangei caused by iridophores. Sci Rep 2021; 11:297. [PMID: 33432052 PMCID: PMC7801506 DOI: 10.1038/s41598-020-79706-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 12/11/2020] [Indexed: 01/29/2023] Open
Abstract
Biofluorescence is widespread in the natural world, but only recently discovered in terrestrial vertebrates. Here, we report on the discovery of iridophore-based, neon-green flourescence in the gecko Pachydactylus rangei, localised to the skin around the eyes and along the flanks. The maximum emission of the fluorescence is at a wavelength of 516 nm in the green spectrum (excitation maximum 465 nm, blue) with another, smaller peak at 430 nm. The fluorescent regions of the skin show large numbers of iridophores, which are lacking in the non-fluorescent parts. Two types of iridophores are recognized, fluorescent iridophores and basal, non-fluorescent iridophores, the latter of which might function as a mirror, amplifying the omnidirectional fluorescence. The strong intensity of the fluorescence (quantum yield of 12.5%) indicates this to be a highly effective mechanism, unique among tetrapods. Although the fluorescence is associated with iridophores, the spectra of emission and excitation as well as the small Stokes shifts argue against guanine crystals as its source, but rather a rigid pair of fluorophores. Further studies are necessary to identify their morphology and chemical structures. We hypothesise that this nocturnal gecko uses the neon-green fluorescence, excited by moonlight, for intraspecific signalling in its open desert habitat.
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Affiliation(s)
- David Prötzel
- grid.452282.b0000 0001 1013 3702Zoologische Staatssammlung München (ZSM-SNSB), Münchhausenstr. 21, 81247 Munich, Germany
| | - Martin Heß
- grid.5252.00000 0004 1936 973XDepartment Biologie II, Ludwig-Maximilians-Universität München, Großhaderner Straße 2, 82152 Planegg-Martinsried, Germany
| | - Martina Schwager
- grid.434949.70000 0001 1408 3925Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Lothstr. 34, 80335 Munich, Germany
| | - Frank Glaw
- grid.452282.b0000 0001 1013 3702Zoologische Staatssammlung München (ZSM-SNSB), Münchhausenstr. 21, 81247 Munich, Germany
| | - Mark D. Scherz
- grid.452282.b0000 0001 1013 3702Zoologische Staatssammlung München (ZSM-SNSB), Münchhausenstr. 21, 81247 Munich, Germany
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Puisay A, Elleaume N, Fouqueau L, Lacube Y, Goiran C, Sidobre C, Metian M, Hédouin L. Parental bleaching susceptibility leads to differences in larval fluorescence and dispersal potential in Pocillopora acuta corals. MARINE ENVIRONMENTAL RESEARCH 2021; 163:105200. [PMID: 33248410 DOI: 10.1016/j.marenvres.2020.105200] [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: 05/01/2020] [Revised: 10/23/2020] [Accepted: 10/24/2020] [Indexed: 06/12/2023]
Abstract
Coral reef ecosystems are declining at an alarming rate. Increasing seawater temperatures and occurrence of extreme warming events can impair sexual reproduction in reef-building corals and inhibit the ability for coral communities to replenish and persist. Here, we investigated the role of photophysiology on the reproductive ecology of Pocillopora acuta coral colonies by focusing on the impacts of bleaching susceptibility of parents on reproduction and larval performance, during an El Niño Southern Oscillation event in Mo'orea, French Polynesia. Elevated temperature conditions at that time induced bleaching phenotypic differences among P. acuta individuals: certain colonies became pale (from the loss of pigments and/or decline in symbiont cell density), while others remained pigmented (normal/high symbiont cell density). More specifically, we studied the impact of parental phenotypes on offspring's fluorescence by counting released larvae and sorting them by fluorescence types, we assessed survival to thermal stress, recruitment success and post-recruitment survival of released larvae from each fluorescent phenotype, during summer months (February to April 2016). Our results showed that red and green fluorescent larvae released by P. acuta had distinct physiological performances: red fluorescent larvae exhibited a higher survival into the pelagic phase regardless temperature conditions, with lower capacity to settle and survive post-recruitment, compared to green larvae that settle within a short period. Interestingly, pale colonies released two-to seven-fold more red fluorescent larvae than pigmented colonies did. In the light of our results, photophysiological profiles of the brooding P. acuta parental colonies may modulate the fluorescence features of released larvae, and thus influence the dispersal strategy of their offspring, the green fluorescent larval phenotypes being more performant in the benthic than pelagic phase.
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Affiliation(s)
- Antoine Puisay
- PSL Research University, USR 3278 CNRS EPHE UPVD CRIOBE, BP1013, Papetoai, French Polynesia; Laboratoire d'Excellence "CORAIL", B1013, 98,729 Papetoai, Mo'orea, French Polynesia
| | - Nicolas Elleaume
- PSL Research University, USR 3278 CNRS EPHE UPVD CRIOBE, BP1013, Papetoai, French Polynesia; Laboratoire d'Excellence "CORAIL", B1013, 98,729 Papetoai, Mo'orea, French Polynesia
| | - Louise Fouqueau
- PSL Research University, USR 3278 CNRS EPHE UPVD CRIOBE, BP1013, Papetoai, French Polynesia; Laboratoire d'Excellence "CORAIL", B1013, 98,729 Papetoai, Mo'orea, French Polynesia; CNRS, UMI 3614, Evolutionary Biology and Ecology of Algae, Roscoff, France
| | - Yann Lacube
- PSL Research University, USR 3278 CNRS EPHE UPVD CRIOBE, BP1013, Papetoai, French Polynesia; Laboratoire d'Excellence "CORAIL", B1013, 98,729 Papetoai, Mo'orea, French Polynesia
| | - Claire Goiran
- Laboratoire d'Excellence "CORAIL", B1013, 98,729 Papetoai, Mo'orea, French Polynesia; ISEA Institut de Sciences Exactes et Appliquées, Université de la Nouvelle-Calédonie, France
| | - Christine Sidobre
- PSL Research University, USR 3278 CNRS EPHE UPVD CRIOBE, BP1013, Papetoai, French Polynesia; Laboratoire d'Excellence "CORAIL", B1013, 98,729 Papetoai, Mo'orea, French Polynesia
| | - Marc Metian
- International Atomic Energy Agency, Environment Laboratories, 4a, Quai Antoine 1er, MC-98,000, Principality of Monaco, Monaco
| | - Laetitia Hédouin
- PSL Research University, USR 3278 CNRS EPHE UPVD CRIOBE, BP1013, Papetoai, French Polynesia; Laboratoire d'Excellence "CORAIL", B1013, 98,729 Papetoai, Mo'orea, French Polynesia.
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Borisova-Mubarakshina MM, Tsygankov AA, Tomo T, Allakhverdiev SI, Eaton-Rye JJ, Govindjee G. International conference on "Photosynthesis and Hydrogen Energy Research for Sustainability-2019": in honor of Tingyun Kuang, Anthony Larkum, Cesare Marchetti, and Kimiyuki Satoh. PHOTOSYNTHESIS RESEARCH 2020; 146:5-15. [PMID: 31758403 DOI: 10.1007/s11120-019-00687-w] [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: 09/16/2019] [Accepted: 10/23/2019] [Indexed: 06/10/2023]
Abstract
The 10th International Conference on «Photosynthesis and Hydrogen Energy Research for Sustainability-2019» was held in honor of Tingyun Kuang (China), Anthony Larkum (Australia), Cesare Marchetti (Italy), and Kimiyuki Satoh (Japan), in St. Petersburg (Russia) during June 23-28, 2019. The official conference organizers from the Russian side were from the Institute of Basic Biological Problems of the Russian Academy of Sciences (IBBP RAS), Russian Society for Photobiology (RSP), and the Komarov Botanical Institute of the Russian Academy of Sciences ([K]BIN RAS). This conference was organized with the help of Monomax Company, a member of the International Congress Convention Association (ICCA), and was supported by the Ministry of Education and Science of the Russian Federation. Here, we provide a brief description of the conference, its scientific program, as well as a brief introduction and key contributions of the four honored scientists. Further, we emphasize the recognition given, at this conference, to several outstanding young researchers, from around the World, for their research in the area of our conference. A special feature of this paper is the inclusion of photographs provided by one of us (Tatsuya Tomo). Lastly, we urge the readers to watch for information on the next 11th conference on "Photosynthesis and Hydrogen Energy Research for Sustainability-2021," to be held in Bulgaria in 2021.
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Affiliation(s)
| | - Anatoly A Tsygankov
- Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, Russia, 142290
| | - Tatsuya Tomo
- Department of Biology, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-Ku, Tokyo, 162-8601, Japan
| | - Suleyman I Allakhverdiev
- Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, Russia, 142290
- K.A. Timiryazev. Institute of Plant Physiology, Russian Academy of Sciences, 35 Botanicheskaya St, Moscow, Russia, 127276
| | - Julian J Eaton-Rye
- Department of Biochemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Govindjee Govindjee
- Department of Plant Biology, Department of Biochemistry, and Center of Biophysics & Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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Lambert GG, Depernet H, Gotthard G, Schultz DT, Navizet I, Lambert T, Adams SR, Torreblanca-Zanca A, Chu M, Bindels DS, Levesque V, Nero Moffatt J, Salih A, Royant A, Shaner NC. Aequorea's secrets revealed: New fluorescent proteins with unique properties for bioimaging and biosensing. PLoS Biol 2020; 18:e3000936. [PMID: 33137097 PMCID: PMC7660908 DOI: 10.1371/journal.pbio.3000936] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/12/2020] [Accepted: 10/15/2020] [Indexed: 11/21/2022] Open
Abstract
Using mRNA sequencing and de novo transcriptome assembly, we identified, cloned, and characterized 9 previously undiscovered fluorescent protein (FP) homologs from Aequorea victoria and a related Aequorea species, with most sequences highly divergent from A. victoria green fluorescent protein (avGFP). Among these FPs are the brightest green fluorescent protein (GFP) homolog yet characterized and a reversibly photochromic FP that responds to UV and blue light. Beyond green emitters, Aequorea species express purple- and blue-pigmented chromoproteins (CPs) with absorbances ranging from green to far-red, including 2 that are photoconvertible. X-ray crystallography revealed that Aequorea CPs contain a chemically novel chromophore with an unexpected crosslink to the main polypeptide chain. Because of the unique attributes of several of these newly discovered FPs, we expect that Aequorea will, once again, give rise to an entirely new generation of useful probes for bioimaging and biosensing.
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Affiliation(s)
- Gerard G. Lambert
- Department of Neurosciences, Center for Research in Biological Systems, University of California San Diego School of Medicine, La Jolla, California, United States of America
| | - Hadrien Depernet
- Structural Biology Group, European Synchrotron Radiation Facility, Grenoble, France
| | - Guillaume Gotthard
- Structural Biology Group, European Synchrotron Radiation Facility, Grenoble, France
| | - Darrin T. Schultz
- University of California Santa Cruz, Santa Cruz, California, United States of America
- Monterey Bay Aquarium Research Institute, Moss Landing, California, United States of America
| | - Isabelle Navizet
- Laboratoire Modélisation et Simulation Multi-Echelle, Université Gustave Eiffel, Université Paris Est Creteil, Marne-la-Vallée, France
| | - Talley Lambert
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Stephen R. Adams
- Department of Pharmacology, University of California San Diego School of Medicine, La Jolla, California, United States of America
| | - Albertina Torreblanca-Zanca
- Department of Neurosciences, Center for Research in Biological Systems, University of California San Diego School of Medicine, La Jolla, California, United States of America
| | - Meihua Chu
- Department of Neurosciences, Center for Research in Biological Systems, University of California San Diego School of Medicine, La Jolla, California, United States of America
| | - Daphne S. Bindels
- Nikon Imaging Center, University of California San Diego, La Jolla, California, United States of America
| | - Vincent Levesque
- Birch Aquarium at Scripps, La Jolla, California, United States of America
| | | | - Anya Salih
- Confocal Facility, Western Sydney University, Penrith, New South Wales, Australia
| | - Antoine Royant
- Structural Biology Group, European Synchrotron Radiation Facility, Grenoble, France
- Institut de Biologie Structurale, Université Grenoble Alpes, CNRS, CEA, Grenoble, France
| | - Nathan C. Shaner
- Department of Neurosciences, Center for Research in Biological Systems, University of California San Diego School of Medicine, La Jolla, California, United States of America
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Levy O, Fernandes de Barros Marangoni L, I C Benichou J, Rottier C, Béraud E, Grover R, Ferrier-Pagès C. Artificial light at night (ALAN) alters the physiology and biochemistry of symbiotic reef building corals. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 266:114987. [PMID: 32622006 DOI: 10.1016/j.envpol.2020.114987] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 06/05/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
Artificial Light at Night (ALAN), which is the alteration of natural light levels as the result of anthropogenic light sources, has been acknowledged as an important factor that alters the functioning of marine ecosystems. Using LEDs light to mimic ALAN, we studied the effect on the physiology (symbiont and chlorophyll contents, photosynthesis, respiration, pigment profile, skeletal growth, and oxidative stress responses) of two scleractinian coral species originating from the Red Sea. ALAN induced the photoinhibition of symbiont photosynthesis, as well as an overproduction of reactive oxygen species (ROS) and an increase in oxidative damage to lipids in both coral species. The extent of the deleterious effects of ALAN on the symbiotic association and coral physiology was aligned with the severity of the oxidative stress condition experienced by the corals. The coral species Sylophora pistillata, which experienced a more severe oxidative stress condition than the other species tested, Turbinaria reniformis, also showed a more pronounced bleaching (loss of symbionts and chlorophyll content), enhanced photoinhibition and decreased photosynthetic rates. Findings of the present study further our knowledge on the biochemical mechanisms underpinning the deleterious impacts of ALAN on scleractinian corals, ultimately shedding light on the emerging threat of ALAN on coral reef ecology. Further, considering that global warming and light pollution will increase in the next few decades, future studies should be taken to elucidate the potential synergetic effects of ALAN and global climate change stressors.
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Affiliation(s)
- Oren Levy
- Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, 52900, Israel.
| | | | - Jennifer I C Benichou
- Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, 52900, Israel
| | - Cécile Rottier
- Centre Scientifique de Monaco, Biologie Marine, Equipe d'Ecophysiologie, MC-98000, Monaco
| | - Eric Béraud
- Centre Scientifique de Monaco, Biologie Marine, Equipe d'Ecophysiologie, MC-98000, Monaco
| | - Renaud Grover
- Centre Scientifique de Monaco, Biologie Marine, Equipe d'Ecophysiologie, MC-98000, Monaco
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Chiu YL, Shikina S, Yoshioka Y, Shinzato C, Chang CF. De novo transcriptome assembly from the gonads of a scleractinian coral, Euphyllia ancora: molecular mechanisms underlying scleractinian gametogenesis. BMC Genomics 2020; 21:732. [PMID: 33087060 PMCID: PMC7579821 DOI: 10.1186/s12864-020-07113-9] [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: 06/01/2020] [Accepted: 09/29/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Sexual reproduction of scleractinians has captured the attention of researchers and the general public for decades. Although extensive ecological data has been acquired, underlying molecular and cellular mechanisms remain largely unknown. In this study, to better understand mechanisms underlying gametogenesis, we isolated ovaries and testes at different developmental phases from a gonochoric coral, Euphyllia ancora, and adopted a transcriptomic approach to reveal sex- and phase-specific gene expression profiles. In particular, we explored genes associated with oocyte development and maturation, spermiogenesis, sperm motility / capacitation, and fertilization. RESULTS 1.6 billion raw reads were obtained from 24 gonadal samples. De novo assembly of trimmed reads, and elimination of contigs derived from symbiotic dinoflagellates (Symbiodiniaceae) and other organisms yielded a reference E. ancora gonadal transcriptome of 35,802 contigs. Analysis of 4 developmental phases identified 2023 genes that were differentially expressed during oogenesis and 678 during spermatogenesis. In premature/mature ovaries, 631 genes were specifically upregulated, with 538 in mature testes. Upregulated genes included those involved in gametogenesis, gamete maturation, sperm motility / capacitation, and fertilization in other metazoans, including humans. Meanwhile, a large number of genes without homology to sequences in the SWISS-PROT database were also observed among upregulated genes in premature / mature ovaries and mature testes. CONCLUSIONS Our findings show that scleractinian gametogenesis shares many molecular characteristics with that of other metazoans, but it also possesses unique characteristics developed during cnidarian and/or scleractinian evolution. To the best of our knowledge, this study is the first to create a gonadal transcriptome assembly from any scleractinian. This study and associated datasets provide a foundation for future studies regarding gametogenesis and differences between male and female colonies from molecular and cellular perspectives. Furthermore, our transcriptome assembly will be a useful reference for future development of sex-specific and/or stage-specific germ cell markers that can be used in coral aquaculture and ecological studies.
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Affiliation(s)
- Yi-Ling Chiu
- Doctoral Program in Marine Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan.,Doctoral Program in Marine Biotechnology, Academia Sinica, Taipei, 11529, Taiwan
| | - Shinya Shikina
- Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, Taiwan. .,Center of Excellence for the Oceans, National Taiwan Ocean University, 2 Pei-Ning Rd, Keelung, 20224, Taiwan.
| | - Yuki Yoshioka
- Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, 277-8564, Japan
| | - Chuya Shinzato
- Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, 277-8564, Japan.
| | - Ching-Fong Chang
- Center of Excellence for the Oceans, National Taiwan Ocean University, 2 Pei-Ning Rd, Keelung, 20224, Taiwan. .,Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan.
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50
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Suma HR, Prakash S, Eswarappa SM. Naturally occurring fluorescence protects the eutardigrade Paramacrobiotus sp. from ultraviolet radiation. Biol Lett 2020; 16:20200391. [PMID: 33050831 DOI: 10.1098/rsbl.2020.0391] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Naturally occurring fluorescence has been observed in multiple species ranging from bacteria to birds. In macroscopic animals such as birds, fluorescence provides a visual communication signal. However, the functional significance of this phenomenon is unknown in most cases. Though photoprotection is attributed to fluorescence under ultraviolet (UV) light in some organisms, it lacks direct experimental evidence. Here, we demonstrate naturally occurring fluorescence under UV light in a eutardigrade belonging to the genus Paramacrobiotus. Using a natural variant that lacks fluorescence, we show that the fluorescence confers tolerance to lethal UV radiation. Remarkably, the fluorescent extract from Paramacrobiotus sp. could protect the UV-sensitive tardigrade Hypsibius exemplaris and nematode Caenorhabditis elegans from germicidal UV radiation. We propose that Paramacrobiotus sp. possess a protective fluorescent shield that absorbs harmful UV radiation and emits harmless blue light.
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Affiliation(s)
- Harikumar R Suma
- Department of Biochemistry, Indian Institute of Science, Bengaluru, 560012 Karnataka, India
| | - Swathi Prakash
- Department of Biochemistry, Indian Institute of Science, Bengaluru, 560012 Karnataka, India
| | - Sandeep M Eswarappa
- Department of Biochemistry, Indian Institute of Science, Bengaluru, 560012 Karnataka, India
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