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Sikorskaya TV. Coral Lipidome: Molecular Species of Phospholipids, Glycolipids, Betaine Lipids, and Sphingophosphonolipids. Mar Drugs 2023; 21:335. [PMID: 37367660 DOI: 10.3390/md21060335] [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: 05/15/2023] [Revised: 05/28/2023] [Accepted: 05/29/2023] [Indexed: 06/28/2023] Open
Abstract
Coral reefs are the most biodiversity-rich ecosystems in the world's oceans. Coral establishes complex interactions with various microorganisms that constitute an important part of the coral holobiont. The best-known coral endosymbionts are Symbiodiniaceae dinoflagellates. Each member of the coral microbiome contributes to its total lipidome, which integrates many molecular species. The present study summarizes available information on the molecular species of the plasma membrane lipids of the coral host and its dinoflagellates (phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylserine (PS), phosphatidylinositol (PI), ceramideaminoethylphosphonate, and diacylglyceryl-3-O-carboxyhydroxymethylcholine), and the thylakoid membrane lipids of dinoflagellates (phosphatidylglycerol (PG) and glycolipids). Alkyl chains of PC and PE molecular species differ between tropical and cold-water coral species, and features of their acyl chains depend on the coral's taxonomic position. PS and PI structural features are associated with the presence of an exoskeleton in the corals. The dinoflagellate thermosensitivity affects the profiles of PG and glycolipid molecular species, which can be modified by the coral host. Coral microbiome members, such as bacteria and fungi, can also be the source of the alkyl and acyl chains of coral membrane lipids. The lipidomics approach, providing broader and more detailed information about coral lipid composition, opens up new opportunities in the study of biochemistry and ecology of corals.
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Affiliation(s)
- Tatyana V Sikorskaya
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, ul. Palchevskogo 17, 690041 Vladivostok, Russia
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Mashini AG, Oakley CA, Beepat SS, Peng L, Grossman AR, Weis VM, Davy SK. The Influence of Symbiosis on the Proteome of the Exaiptasia Endosymbiont Breviolum minutum. Microorganisms 2023; 11:292. [PMID: 36838257 PMCID: PMC9967746 DOI: 10.3390/microorganisms11020292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/13/2023] [Accepted: 01/19/2023] [Indexed: 01/26/2023] Open
Abstract
The cellular mechanisms responsible for the regulation of nutrient exchange, immune response, and symbiont population growth in the cnidarian-dinoflagellate symbiosis are poorly resolved. Here, we employed liquid chromatography-mass spectrometry to elucidate proteomic changes associated with symbiosis in Breviolum minutum, a native symbiont of the sea anemone Exaiptasia diaphana ('Aiptasia'). We manipulated nutrients available to the algae in culture and to the holobiont in hospite (i.e., in symbiosis) and then monitored the impacts of our treatments on host-endosymbiont interactions. Both the symbiotic and nutritional states had significant impacts on the B. minutum proteome. B. minutum in hospite showed an increased abundance of proteins involved in phosphoinositol metabolism (e.g., glycerophosphoinositol permease 1 and phosphatidylinositol phosphatase) relative to the free-living alga, potentially reflecting inter-partner signalling that promotes the stability of the symbiosis. Proteins potentially involved in concentrating and fixing inorganic carbon (e.g., carbonic anhydrase, V-type ATPase) and in the assimilation of nitrogen (e.g., glutamine synthase) were more abundant in free-living B. minutum than in hospite, possibly due to host-facilitated access to inorganic carbon and nitrogen limitation by the host when in hospite. Photosystem proteins increased in abundance at high nutrient levels irrespective of the symbiotic state, as did proteins involved in antioxidant defences (e.g., superoxide dismutase, glutathione s-transferase). Proteins involved in iron metabolism were also affected by the nutritional state, with an increased iron demand and uptake under low nutrient treatments. These results detail the changes in symbiont physiology in response to the host microenvironment and nutrient availability and indicate potential symbiont-driven mechanisms that regulate the cnidarian-dinoflagellate symbiosis.
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Affiliation(s)
| | - Clinton A. Oakley
- School of Biological Sciences, Victoria University of Wellington, Wellington 6140, New Zealand
| | - Sandeep S. Beepat
- School of Biological Sciences, Victoria University of Wellington, Wellington 6140, New Zealand
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
| | - Lifeng Peng
- School of Biological Sciences, Victoria University of Wellington, Wellington 6140, New Zealand
- Centre for Biodiscovery, Victoria University of Wellington, Wellington 6140, New Zealand
| | - Arthur R. Grossman
- Department of Plant Biology, The Carnegie Institution for Science, Stanford, CA 94305, USA
| | - Virginia M. Weis
- Department of Integrative Biology, Oregon State University, Corvallis, OR 97331, USA
| | - Simon K. Davy
- School of Biological Sciences, Victoria University of Wellington, Wellington 6140, New Zealand
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Kwok ACM, Chan WS, Wong JTY. Dinoflagellate Amphiesmal Dynamics: Cell Wall Deposition with Ecdysis and Cellular Growth. Mar Drugs 2023; 21:md21020070. [PMID: 36827111 PMCID: PMC9959387 DOI: 10.3390/md21020070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/11/2023] [Accepted: 01/17/2023] [Indexed: 01/24/2023] Open
Abstract
Dinoflagellates are a major aquatic protist group with amphiesma, multiple cortical membranous "cell wall" layers that contain large circum-cortical alveolar sacs (AVs). AVs undergo extensive remodeling during cell- and life-cycle transitions, including ecdysal cysts (ECs) and resting cysts that are important in some harmful algal bloom initiation-termination. AVs are large cortical vesicular compartments, within which are elaborate cellulosic thecal plates (CTPs), in thecate species, and the pellicular layer (PL). AV-CTPs provide cellular mechanical protection and are targets of vesicular transport that are replaced during EC-swarmer cell transition, or with increased deposition during the cellular growth cycle. AV-PL exhibits dynamical-replacement with vesicular trafficking that are orchestrated with amphiesmal chlortetracycline-labeled Ca2+ stores signaling, integrating cellular growth with different modes of cell division cycle/progression. We reviewed the dynamics of amphiesma during different cell division cycle modes and life cycle stages, and its multifaceted regulations, focusing on the regulatory and functional readouts, including the coral-zooxanthellae interactions.
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Mayfield AB. Multi-macromolecular Extraction from Endosymbiotic Anthozoans. Methods Mol Biol 2023; 2625:17-56. [PMID: 36653630 DOI: 10.1007/978-1-0716-2966-6_3] [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: 06/17/2023]
Abstract
Obligately symbiotic associations between reef-building corals (anthozoan cnidarians) and photosynthetically active dinoflagellates of the family Symbiodiniaceae comprise the functional basis of all coral reef ecosystems. Given the existential threats of global climate change toward these thermo-sensitive entities, there is an urgent need to better understand the physiological implications of changes in the abiotic milieu of scleractinian corals and their mutualistic algal endosymbionts. Although initially slow to leverage the immense breakthroughs in molecular biotechnology that have benefited humankind, coral biologists are making up for lost time in exploiting an array of ever-advancing molecular tools for answering key questions pertaining to the survival of corals in an ever-changing world. In order to comprehensively characterize the multi-omic landscape of the coral holobiont-the cnidarian host, its intracellular dinoflagellates, and a plethora of other microbial constituents-I introduce a series of protocols herein that yield large quantities of high-quality RNA, DNA, protein, lipids, and polar metabolites from a diverse array of reef corals and endosymbiotic sea anemones. Although numerous published articles in the invertebrate zoology field feature protocols that lead to sufficiently high yield of intact host coral macromolecules, through using the approach outlined herein one may simultaneously acquire a rich, multi-compartmental biochemical pool that truly reflects the complex and dynamic nature of these animal-plant chimeras.
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Nitschke MR, Rosset SL, Oakley CA, Gardner SG, Camp EF, Suggett DJ, Davy SK. The diversity and ecology of Symbiodiniaceae: A traits-based review. ADVANCES IN MARINE BIOLOGY 2022; 92:55-127. [PMID: 36208879 DOI: 10.1016/bs.amb.2022.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Among the most successful microeukaryotes to form mutualisms with animals are dinoflagellates in the family Symbiodiniaceae. These photosynthetic symbioses drive significant primary production and are responsible for the formation of coral reef ecosystems but are particularly sensitive when environmental conditions become extreme. Annual episodes of widespread coral bleaching (disassociation of the mutualistic partnership) and mortality are forecasted from the year 2060 under current trends of ocean warming. However, host cnidarians and dinoflagellate symbionts display exceptional genetic and functional diversity, and meaningful predictions of the future that embrace this biological complexity are difficult to make. A recent move to trait-based biology (and an understanding of how traits are shaped by the environment) has been adopted to move past this problem. The aim of this review is to: (1) provide an overview of the major cnidarian lineages that are symbiotic with Symbiodiniaceae; (2) summarise the symbiodiniacean genera associated with cnidarians with reference to recent changes in taxonomy and systematics; (3) examine the knowledge gaps in Symbiodiniaceae life history from a trait-based perspective; (4) review Symbiodiniaceae trait variation along three abiotic gradients (light, nutrients, and temperature); and (5) provide recommendations for future research of Symbiodiniaceae traits. We anticipate that a detailed understanding of traits will further reveal basic knowledge of the evolution and functional diversity of these mutualisms, as well as enhance future efforts to model stability and change in ecosystems dependent on cnidarian-dinoflagellate organisms.
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Affiliation(s)
- Matthew R Nitschke
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand; Climate Change Cluster, University of Technology Sydney, Broadway, NSW, Australia.
| | - Sabrina L Rosset
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Clinton A Oakley
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Stephanie G Gardner
- Center for Marine Science and Innovation, University of New South Wales Sydney, Kensington, NSW, Australia
| | - Emma F Camp
- Climate Change Cluster, University of Technology Sydney, Broadway, NSW, Australia
| | - David J Suggett
- Climate Change Cluster, University of Technology Sydney, Broadway, NSW, Australia
| | - Simon K Davy
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
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Ermolenko EV, Sikorskaya TV, Dolmatov IY. Distribution of Fatty Acids in Storage and Structural Lipids of the Holothurian Eupentacta fraudatrix. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2022. [DOI: 10.1134/s106816202202008x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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de Azevedo-Martins AC, Ocaña K, de Souza W, de Vasconcelos ATR, Teixeira MMG, Camargo EP, Alves JMP, Motta MCM. The Importance of Glycerophospholipid Production to the Mutualist Symbiosis of Trypanosomatids. Pathogens 2021; 11:pathogens11010041. [PMID: 35055989 PMCID: PMC8779180 DOI: 10.3390/pathogens11010041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 12/12/2022] Open
Abstract
The symbiosis in trypanosomatids is a mutualistic relationship characterized by extensive metabolic exchanges between the bacterium and the protozoan. The symbiotic bacterium can complete host essential metabolic pathways, such as those for heme, amino acid, and vitamin production. Experimental assays indicate that the symbiont acquires phospholipids from the host trypanosomatid, especially phosphatidylcholine, which is often present in bacteria that have a close association with eukaryotic cells. In this work, an in-silico study was performed to find genes involved in the glycerophospholipid (GPL) production of Symbiont Harboring Trypanosomatids (SHTs) and their respective bacteria, also extending the search for trypanosomatids that naturally do not have symbionts. Results showed that most genes for GPL synthesis are only present in the SHT. The bacterium has an exclusive sequence related to phosphatidylglycerol production and contains genes for phosphatidic acid production, which may enhance SHT phosphatidic acid production. Phylogenetic data did not indicate gene transfers from the bacterium to the SHT nucleus, proposing that enzymes participating in GPL route have eukaryotic characteristics. Taken together, our data indicate that, differently from other metabolic pathways described so far, the symbiont contributes little to the production of GPLs and acquires most of these molecules from the SHT.
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Affiliation(s)
- Allan C. de Azevedo-Martins
- Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 20000-000, RJ, Brazil; (A.C.d.A.-M.); (W.d.S.)
| | - Kary Ocaña
- Laboratório Nacional de Computação Científica, Petropolis 25600-000, RJ, Brazil; (K.O.); (A.T.R.d.V.)
| | - Wanderley de Souza
- Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 20000-000, RJ, Brazil; (A.C.d.A.-M.); (W.d.S.)
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens, Rio de Janeiro 20000-000, RJ, Brazil
| | | | - Marta M. G. Teixeira
- Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Sao Paulo 05508-000, SP, Brazil; (M.M.G.T.); (E.P.C.)
| | - Erney P. Camargo
- Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Sao Paulo 05508-000, SP, Brazil; (M.M.G.T.); (E.P.C.)
| | - João M. P. Alves
- Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Sao Paulo 05508-000, SP, Brazil; (M.M.G.T.); (E.P.C.)
- Correspondence: (J.M.P.A.); (M.C.M.M.)
| | - Maria Cristina M. Motta
- Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 20000-000, RJ, Brazil; (A.C.d.A.-M.); (W.d.S.)
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens, Rio de Janeiro 20000-000, RJ, Brazil
- Correspondence: (J.M.P.A.); (M.C.M.M.)
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Cirino L, Tsai S, Wen ZH, Wang LH, Chen HK, Cheng JO, Lin C. Lipid profiling in chilled coral larvae. Cryobiology 2021; 102:56-67. [PMID: 34329639 DOI: 10.1016/j.cryobiol.2021.07.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 07/22/2021] [Accepted: 07/23/2021] [Indexed: 01/08/2023]
Abstract
Coral reefs are disappearing worldwide as a result of several harmful human activities. The establishment of cryobanks can secure a future for these ecosystems. To design effective cryopreservation protocols, basic proprieties such as chilling tolerance and lipid content must be assessed. In the present study, we investigated chilling sensitivity and the effect of chilling exposure on the lipid content and composition of larvae belonging to 2 common Indo-Pacific corals: Seriatopora caliendrum and Pocillopora verrucosa. The viability of coral larvae incubated with 0.5, 1, and 2 M ethylene glycol (EG), propylene glycol (PG), dimethyl sulfoxide (Me2SO), methanol, or glycerol and kept at 5 °C for different time periods was documented. In addition, we investigated the content of cholesterol, triacylglycerol (TAG), wax ester (WE), sterol ester (SE), lysophosphatidylcholine, phosphatidylcholine, phosphatidylethanolamine, and several fatty acid (FA) classes in coral propagules incubated with 1 M PG or EG and kept at 5 °C for 6 h. Moreover, we examined seasonal changes in the aforementioned lipid classes in coral larvae. S. caliendrum incubated with 0.5 M PG or Me2SO and chilled for 2 h exhibited a viability rate of 11 ± 11%, whereas P. verrucosa exhibited a viability rate of 22 ± 14% after being chilled for 4 h. Furthermore, the results indicated that chilling exposure did not affect the content of any investigated lipid class in either species. The higher concentration of SE in P. verrucosa compared to S. caliendrum larvae may have contributed to the different cryotolerance displayed by the 2 larval species. A year-round lipid analysis of both coral larvae species revealed trends of homeoviscous adaptation and seasonal enhancement of lipid fluxes from symbionts to the host. During winter, the cholesterol/phospholipid ratio significantly increased, and P. verrucosa larvae exhibited an averagely decrease in FA chain lengths. During spring and summer, intracellular lipid content in the form of TAGs and WEs significantly increased in both species, and the average content of Symbiodiniaceae-derived FAs increased in P. verrucosa larvae. We concluded that the low cryotolerance displayed by S. caliendrum and P. verrucosa larvae is attributable to their chilling-sensitive membrane lipid profile and the high intracellular lipid content provided by their endosymbionts.
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Affiliation(s)
- Luca Cirino
- Department of Marine Biotechnology and Resources, National Sun Yai-sen University, Kaohsiung, Taiwan; National Museum of Marine Biology & Aquarium, Pingtung, Taiwan
| | - Sujune Tsai
- Department of Post Modern Agriculture, Mingdao University, Chang Hua, Taiwan.
| | - Zhi-Hong Wen
- Department of Marine Biotechnology and Resources, National Sun Yai-sen University, Kaohsiung, Taiwan
| | - Li-Hsueh Wang
- National Museum of Marine Biology & Aquarium, Pingtung, Taiwan; Institute of Marine Biology, National Dong Hwa University, Pingtung, Taiwan
| | - Hung-Kai Chen
- National Museum of Marine Biology & Aquarium, Pingtung, Taiwan
| | - Jing-O Cheng
- National Museum of Marine Biology & Aquarium, Pingtung, Taiwan
| | - Chiahsin Lin
- National Museum of Marine Biology & Aquarium, Pingtung, Taiwan; Institute of Marine Biology, National Dong Hwa University, Pingtung, Taiwan.
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Sikorskaya TV, Imbs AB. Coral Lipidomes and Their Changes during Coral Bleaching. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162020050234] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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10
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Mayfield AB. Proteomic Signatures of Corals from Thermodynamic Reefs. Microorganisms 2020; 8:microorganisms8081171. [PMID: 32752238 PMCID: PMC7465421 DOI: 10.3390/microorganisms8081171] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 12/30/2022] Open
Abstract
Unlike most parts of the world, coral reefs of Taiwan’s deep south have generally been spared from climate change-induced degradation. This has been linked to the oceanographically unique nature of Nanwan Bay, where intense upwelling occurs. Specifically, large-amplitude internal waves cause shifts in temperature of 6–9 °C over the course of several hours, and the resident corals not only thrive under such conditions, but they have also been shown to withstand multi-month laboratory incubations at experimentally elevated temperatures. To gain insight into the sub-cellular basis of acclimation to upwelling, proteins isolated from reef corals (Seriatopora hystrix) featured in laboratory-based reciprocal transplant studies in which corals from upwelling and non-upwelling control reefs (<20 km away) were exposed to stable or variable temperature regimes were analyzed via label-based proteomics (iTRAQ). Corals exposed to their “native” temperature conditions for seven days (1) demonstrated highest growth rates and (2) were most distinct from one another with respect to their protein signatures. The latter observation was driven by the fact that two Symbiodiniaceae lipid trafficking proteins, sec1a and sec34, were marginally up-regulated in corals exposed to their native temperature conditions. Alongside the marked degree of proteomic “site fidelity” documented, this dataset sheds light on the molecular mechanisms underlying acclimatization to thermodynamically extreme conditions in situ.
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Affiliation(s)
- Anderson B. Mayfield
- Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, 4301 Rickenbacker Causeway, Miami, FL 33149, USA; or ; Tel.: +1-337-501-1976
- Cooperative Institutes for Marine and Atmospheric Studies, University of Miami, 4300 Rickenbacker Causeway, Miami, FL 33149, USA
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Shiu JH, Yu SP, Fong CL, Ding JY, Tan CJ, Fan TY, Lu CY, Tang SL. Shifting in the Dominant Bacterial Group Endozoicomonas Is Independent of the Dissociation With Coral Symbiont Algae. Front Microbiol 2020; 11:1791. [PMID: 32849407 PMCID: PMC7412130 DOI: 10.3389/fmicb.2020.01791] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 07/08/2020] [Indexed: 11/13/2022] Open
Abstract
The coral-associated Endozoicomonas are dominant bacteria in the coral holobiont. Their relative abundance usually decreases with heat-induced coral bleaching and is proposed to be positively correlated with Symbiodiniaceae abundance. It remains unclear whether this phenomenon of decreased Endozoicomonas abundance is caused by temperature stress or a decreased abundance of Symbiodiniaceae. This study induced bleaching in the coral Euphyllia glabrescens using a dark treatment over 15 weeks. We examined shifts in Endozoicomonas abundance and experimentally reduced Symbiodiniaceae density. 16S rRNA gene amplicon sequencing was used to characterize the changes in bacterial community (incl. Endozoicomonas) over time, and the 16S rRNA gene copy number of Endozoicomonas was quantified by qPCR. We detected a high abundance of Endozoicomonas in E. glabrescens that underwent dark-induced bleaching. The results reveal that changes in the relative abundance of Endozoicomonas are unrelated to Symbiodiniaceae abundance, indicating that Endozoicomonas can be independent of Symbiodiniaceae in the coral holobiont.
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Affiliation(s)
- Jia-Ho Shiu
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan, and National Chung-Hsing University, Taichung, Taiwan.,Biodiversity Research Center, Academia Sinica, Taipei, Taiwan.,Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, Taiwan
| | - Sheng-Ping Yu
- Biodiversity Research Center, Academia Sinica, Taipei, Taiwan
| | - Chia-Ling Fong
- Biodiversity Research Center, Academia Sinica, Taipei, Taiwan
| | - Jiun-Yan Ding
- Biodiversity Research Center, Academia Sinica, Taipei, Taiwan
| | - Chih-Jui Tan
- National Museum of Marine Biology and Aquarium, Pingtung, Taiwan.,Department of Oceanography, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Tung-Yung Fan
- National Museum of Marine Biology and Aquarium, Pingtung, Taiwan
| | - Chih-Ying Lu
- Biodiversity Research Center, Academia Sinica, Taipei, Taiwan
| | - Sen-Lin Tang
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan, and National Chung-Hsing University, Taichung, Taiwan.,Biodiversity Research Center, Academia Sinica, Taipei, Taiwan
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12
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Chiu HY, Lin LY, Chen Y, Liu ER, Li HH. A New Method for Collecting Large Amounts of Symbiotic Gastrodermal Cells from Octocorals. Int J Mol Sci 2020; 21:ijms21113911. [PMID: 32486176 PMCID: PMC7313047 DOI: 10.3390/ijms21113911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/12/2020] [Accepted: 05/28/2020] [Indexed: 11/27/2022] Open
Abstract
The study of cnidarian-dinoflagellate endosymbiosis in octocorals is becoming increasingly important. As symbiotic gastrodermal cells (SGCs) are the key cells in a symbiotic relationship, obtaining SGCs and studying their functions represent an urgent need. The majority of the cells dissociated from octocoral tissues consist of host cells and algal cells, and very few intact SGCs can be observed. To solve this problem, we developed a new method to collect large amounts of SGCs from octocorals. We incubated the tissue of Sinularia flexibilis in high-salinity (60‰) filtered seawater for 6 h and were able to collect more than 18 times the number of SGCs from the control group. To test the quality of the dissociated cells, we performed three assays to evaluate their cell viability. All three assays demonstrated that cell viability was good after incubating in a high-salinity solution. We also used two other octocorals, Paralemnalia thyrsoides and Sinularia compressa, to perform the same experiment, and the results were similar to those for Sinularia flexibilis. Therefore, a high-salinity-induced increase in the SGC ratio is a common phenomenon among octocorals. This method allows researchers to collect large amounts of SGCs from octocorals and helps us to better understand the complex molecular interactions in cnidarian-dinoflagellate endosymbiosis.
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Affiliation(s)
- Hsiang-Yi Chiu
- Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Pingtung 94450, Taiwan; (H.-Y.C.); (L.-Y.L.)
| | - Li-Yi Lin
- Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Pingtung 94450, Taiwan; (H.-Y.C.); (L.-Y.L.)
| | - Ying Chen
- Department of Oceanography, National Sun Yat-Sen University, Kaohsiung City 80424, Taiwan;
| | - En-Ru Liu
- Department of Marine Biotechnology, National Kaohsiung University of Science and Technology, Kaohsiung 81143, Taiwan;
| | - Hsing-Hui Li
- Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Pingtung 94450, Taiwan; (H.-Y.C.); (L.-Y.L.)
- Graduate Institute of Marine Biotechnology, National Dong Hwa University, Pingtung 94450, Taiwan
- Correspondence: ; Tel.: +886-8-8824632
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Maor‐Landaw K, van Oppen MJH, McFadden GI. Symbiotic lifestyle triggers drastic changes in the gene expression of the algal endosymbiont Breviolum minutum (Symbiodiniaceae). Ecol Evol 2020; 10:451-466. [PMID: 31993121 PMCID: PMC6972872 DOI: 10.1002/ece3.5910] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 10/25/2019] [Accepted: 11/18/2019] [Indexed: 01/13/2023] Open
Abstract
Coral-dinoflagellate symbiosis underpins the evolutionary success of corals reefs. Successful exchange of molecules between the cnidarian host and the Symbiodiniaceae algae enables the mutualistic partnership. The algae translocate photosynthate to their host in exchange for nutrients and shelter. The photosynthate must traverse multiple membranes, most likely facilitated by transporters. Here, we compared gene expression profiles of cultured, free-living Breviolum minutum with those of the homologous symbionts freshly isolated from the sea anemone Exaiptasia diaphana, a widely used model for coral hosts. Additionally, we assessed expression levels of a list of candidate host transporters of interest in anemones with and without symbionts. Our transcriptome analyses highlight the distinctive nature of the two algal life stages, with many gene expression level changes correlating to the different morphologies, cell cycles, and metabolisms adopted in hospite versus free-living. Morphogenesis-related genes that likely underpin the metamorphosis process observed when symbionts enter a host cell were up-regulated. Conversely, many down-regulated genes appear to be indicative of the protective and confined nature of the symbiosome. Our results emphasize the significance of transmembrane transport to the symbiosis, and in particular of ammonium and sugar transport. Further, we pinpoint and characterize candidate transporters-predicted to be localized variously to the algal plasma membrane, the host plasma membrane, and the symbiosome membrane-that likely serve pivotal roles in the interchange of material during symbiosis. Our study provides new insights that expand our understanding of the molecular exchanges that underpin the cnidarian-algal symbiotic relationship.
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Affiliation(s)
- Keren Maor‐Landaw
- School of BioSciencesThe University of MelbourneMelbourneVic.Australia
| | - Madeleine J. H. van Oppen
- School of BioSciencesThe University of MelbourneMelbourneVic.Australia
- Australian Institute of Marine ScienceTownsvilleQldAustralia
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14
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Lin C, Thongpoo P, Juri C, Wang LH, Meng PJ, Kuo FW, Tsai S. Cryopreservation of a Thermotolerant Lineage of the Coral Reef Dinoflagellate Symbiodinium. Biopreserv Biobank 2019; 17:520-529. [DOI: 10.1089/bio.2019.0019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Chiahsin Lin
- National Museum of Marine Biology and Aquarium, Pingtung, Taiwan
- Institute of Marine Biology, National Dong Hwa University, Pingtung, Taiwan
| | - Preeyanuch Thongpoo
- Department of Science (Biology), Faculty of Science and Technology, Phuket Rajabhat University, Muang Phuket, Thailand
| | - Cynthia Juri
- National Museum of Marine Biology and Aquarium, Pingtung, Taiwan
| | - Li-Hsueh Wang
- National Museum of Marine Biology and Aquarium, Pingtung, Taiwan
- Institute of Marine Biology, National Dong Hwa University, Pingtung, Taiwan
| | - Pei-Jie Meng
- National Museum of Marine Biology and Aquarium, Pingtung, Taiwan
- Institute of Marine Biology, National Dong Hwa University, Pingtung, Taiwan
| | - Fu-Wen Kuo
- National Museum of Marine Biology and Aquarium, Pingtung, Taiwan
| | - Sujune Tsai
- Department of Post Modern Agriculture, Mingdao University, Chang Hua, Taiwan
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15
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Radice VZ, Brett MT, Fry B, Fox MD, Hoegh-Guldberg O, Dove SG. Evaluating coral trophic strategies using fatty acid composition and indices. PLoS One 2019; 14:e0222327. [PMID: 31509600 PMCID: PMC6739055 DOI: 10.1371/journal.pone.0222327] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 08/27/2019] [Indexed: 11/18/2022] Open
Abstract
The ecological success of shallow water reef-building corals has been linked to the symbiosis between the coral host and its dinoflagellate symbionts (herein ‘symbionts’). As mixotrophs, symbiotic corals depend on nutrients 1) transferred from their photosynthetic symbionts (autotrophy) and 2) acquired by host feeding on particulate organic resources (heterotrophy). However, coral species differ in the extent to which they depend on heterotrophy for nutrition and these differences are typically poorly defined. Here, a multi-tracer fatty acid approach was used to evaluate the trophic strategies of three species of common reef-building coral (Galaxea fascicularis, Pachyseris speciosa, and Pocillopora verrucosa) whose trophic strategies had previously been identified using carbon stable isotopes. The composition and various indices of fatty acids were compared to examine the relative contribution of symbiont autotrophy and host heterotrophy in coral energy acquisition. A linear discriminant analysis (LDA) was used to estimate the contribution of polyunsaturated fatty acids (PUFA) derived from various potential sources to the coral hosts. The total fatty acid composition and fatty acid indices revealed differences between the more heterotrophic (P. verrucosa) and more autotrophic (P. speciosa) coral hosts, with the coral host G. fascicularis showing overlap with the other two species and greater variability overall. For the more heterotrophic P. verrucosa, the fatty acid indices and LDA results both indicated a greater proportion of copepod-derived fatty acids compared to the other coral species. Overall, the LDA estimated that PUFA derived from particulate resources (e.g., copepods and diatoms) comprised a greater proportion of coral host PUFA in contrast to the lower proportion of symbiont-derived PUFA. These estimates provide insight into the importance of heterotrophy in coral nutrition, especially in productive reef systems. The study supports carbon stable isotope results and demonstrates the utility of fatty acid analyses for exploring the trophic strategies of reef-building corals.
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Affiliation(s)
- Veronica Z Radice
- Australian Research Council Centre of Excellence for Coral Reef Studies, The University of Queensland, St. Lucia, Queensland, Australia.,School of Biological Sciences, The University of Queensland, St. Lucia, Queensland, Australia
| | - Michael T Brett
- Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington, United States of America
| | - Brian Fry
- Australian Rivers Institute, Griffith University, Nathan, Queensland, Australia
| | - Michael D Fox
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, United States of America
| | - Ove Hoegh-Guldberg
- Australian Research Council Centre of Excellence for Coral Reef Studies, The University of Queensland, St. Lucia, Queensland, Australia.,School of Biological Sciences, The University of Queensland, St. Lucia, Queensland, Australia
| | - Sophie G Dove
- Australian Research Council Centre of Excellence for Coral Reef Studies, The University of Queensland, St. Lucia, Queensland, Australia.,School of Biological Sciences, The University of Queensland, St. Lucia, Queensland, Australia
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16
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Imbs AB, Dang LPT, Nguyen KB. Comparative lipidomic analysis of phospholipids of hydrocorals and corals from tropical and cold-water regions. PLoS One 2019; 14:e0215759. [PMID: 31034482 PMCID: PMC6488065 DOI: 10.1371/journal.pone.0215759] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 04/08/2019] [Indexed: 11/26/2022] Open
Abstract
To expand our knowledge of lipid and fatty acid (FA) biosynthesis in marine cnidarians, polar lipidomes of hydrocorals were studied for the first time and then compared with those of soft corals from tropical and boreal regions. The structure and content of FAs and molecular species of ethanolamine, choline, serine, and inositol glycerophospholipids (PE, PC, PS, and PI, respectively), and ceramide aminoethylphosphonate (CAEP) in tropical hydrocorals (Millepora platyphylla, M. dichotoma) and the cold-water hydrocoral Allopora steinegeri were determined by chromatography and mass spectrometry. All soft corals and cold-water hydrocorals are characterized by a considerable amount of C20 polyunsaturated FAs (PUFAs) elongated into C22 PUFAs. In the Millepora species, the high level of 22:5n-6 and 22:6n-3 against the background of the extremely low level of C20 PUFAs may be explained by a high activity of rare Δ4 desaturase. In contrast to hydrocorals, soft corals are able to elongate and further desaturate C22 PUFAs into C24 PUFAs. Allopora and soft corals use C20 PUFAs mainly for the synthesis of PE and PC. The molecular species of PS of soft corals concentrate C24 PUFAs, while in Allopora and Millepora the PS molecules are mainly based on 22:4n-6 and 22:5n-6 acyl groups, respectively. Short acyl groups (C14) dominate the CAEP molecules of Allopora. In all the animals compared, most molecular species of PE and PC are ether lipids, but diacyl molecular species dominate PI. Hydrocorals and tropical soft corals contain diacyl and ether PS molecules, respectively, whereas cold-water soft corals contain a mixture of these PS forms. The high similarity of the alkyl/acyl compositions indicates a possible biosynthetic relationship between PS and PI in hydrocorals. The data obtained in our study will provide a resource to further investigate the lipid metabolism in marine invertebrates.
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Affiliation(s)
- Andrey B. Imbs
- National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
- * E-mail:
| | - Ly P. T. Dang
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Graduate University Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Kien B. Nguyen
- Soils and Fertilizers Research Institute, Vietnam Academy of Agricultural Sciences, Hanoi, Vietnam
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17
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Abstract
Herein we propose an ambitious confrontation of the current coral reef crisis through the establishment of a "Coral Hospital." In an analogous manner to a human hospital, "sick" corals will first be diagnosed either in situ or in the hospital's diagnostic "clinic" such that the root cause of illness can be discerned (e.g., disease, high temperatures, or pollutant stress). Then, corals will be "treated" (when necessary) and allowed to "convalesce" in precisely controlled coral husbandry facilities. Upon "rehabilitation," the recovered corals will be returned to their home reef (if this reef was not found to have degraded), or, alternatively, to a site featuring oceanographic conditions favoring a high level of health, as determined by husbandry experiments performed in other hospital "wards." When possible, diagnostic data from the sick corals (i.e., the underlying cause of sickness) will be used to guide environmental remediation schemes aimed at promoting coral resilience in the ocean. If the home reef improves to an appreciable extent during the time the corals are "hospitalized," these corals could be replanted there upon rehabilitation. Regardless of the site of outplanting, recuperated corals will be monitored over time to validate the "quality of care" in the hospital. In the event that the home reefs suffer to such an extent that environmental mitigation is no longer possible, coral gametes will be collected and cryopreserved such that they may be fertilized, reared in officinarum, and later reseeded once/if global marine conditions again permit coral survival.
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Affiliation(s)
- Anderson B Mayfield
- 1Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Checheng, Taiwan
| | - Sujune Tsai
- 2Department of Post-Modern Agriculture, Ming-Dao University, Beidou, Taiwan
| | - Chiahsin Lin
- 1Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Checheng, Taiwan.,3Graduate Institute of Marine Biology, National Dong-Hwa University, Checheng, Taiwan
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18
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Zong X, Zhao J, Wang H, Lu Z, Wang F, Du H, Wang Y. Mettl3 Deficiency Sustains Long-Chain Fatty Acid Absorption through Suppressing Traf6-Dependent Inflammation Response. THE JOURNAL OF IMMUNOLOGY 2018; 202:567-578. [PMID: 30567729 DOI: 10.4049/jimmunol.1801151] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 11/13/2018] [Indexed: 01/24/2023]
Abstract
A better understanding of the molecular mechanism of intestinal fatty acid absorption could lead to novel approaches to treatment and prevention of fatty acid-related metabolic diseases. Although it is confirmed that absorption of long-chain fatty acids (LCFAs) decreases during the pathological processes, the genetic basis and molecular mechanisms remain largely unknown. N 6-methyladenosine (m6A) is the most prevalent internal modification on eukaryotic mRNA. Recently, m6A has been found to play important roles in inflammation and antiviral responses. In this study, we show that deficiency of Mettl3, the core methyltransferase of m6A, exerts antimalabsorption of LCFA activity in vitro through inhibiting the inflammation response mediated by LPS. To substantiate this finding further, we found the levels of triglycerides were also sustained in cells with depleted Mettl3, which were cultured in Transwell to polarize with villus formation to simulate the situation in vivo. Mechanistically, depletion of Mettl3 decreases the m6A level of Traf6 mRNA, thereby its transcripts are entrapped in the nucleus, followed by the decreased expression of Traf6, leading to the suppression of NF-κB and MAPK signaling pathway. Thus, the inflammation response was suppressed, resulting in the sustained absorption of LCFA. Moreover, we found that ectopic expression of Traf6 largely abolishes the sustained absorption LCFA in Mettl3 depletion cells. Collectively, silencing Mettl3 could sustain LCFA absorption through blocking the TRAF6-dependent inflammation response. Our work uncovers a critical function of m6A methylation and provides insight into critical roles of Mettl3 in LCFA absorption and inflammatory disease.
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Affiliation(s)
- Xin Zong
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang Province 310058, People's Republic of China; and
| | - Jing Zhao
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang Province 310058, People's Republic of China; and
| | - Hong Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang Province 310058, People's Republic of China; and
| | - Zeqing Lu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang Province 310058, People's Republic of China; and.,Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, Hangzhou, Zhejiang Province 310058, People's Republic of China
| | - Fengqin Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang Province 310058, People's Republic of China; and.,Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, Hangzhou, Zhejiang Province 310058, People's Republic of China
| | - Huahua Du
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang Province 310058, People's Republic of China; and.,Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, Hangzhou, Zhejiang Province 310058, People's Republic of China
| | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang Province 310058, People's Republic of China; and .,Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, Hangzhou, Zhejiang Province 310058, People's Republic of China
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19
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Mayfield AB, Chen YJ, Lu CY, Chen CS. The proteomic response of the reef coral Pocillopora acuta to experimentally elevated temperatures. PLoS One 2018; 13:e0192001. [PMID: 29385204 PMCID: PMC5792016 DOI: 10.1371/journal.pone.0192001] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 01/15/2018] [Indexed: 12/12/2022] Open
Abstract
Although most reef-building corals live near the upper threshold of their thermotolerance, some scleractinians are resilient to temperature increases. For instance, Pocillopora acuta specimens from an upwelling habitat in Southern Taiwan survived a nine-month experimental exposure to 30°C, a temperature hypothesized to induce stress. To gain a greater understanding of the molecular pathways underlying such high-temperature acclimation, the protein profiles of experimental controls incubated at 27°C were compared to those of conspecific P. acuta specimens exposed to 30°C for two, four, or eight weeks, and differentially concentrated proteins (DCPs) were removed from the gels and sequenced with mass spectrometry. Sixty unique DCPs were uncovered across both eukaryotic compartments of the P. acuta-dinoflagellate (genus Symbiodinium) mutualism, and Symbiodinium were more responsive to high temperature at the protein-level than the coral hosts in which they resided at the two-week sampling time. Furthermore, proteins involved in the stress response were more likely to be documented at different cellular concentrations across temperature treatments in Symbiodinium, whereas the temperature-sensitive host coral proteome featured numerous proteins involved in cytoskeletal structure, immunity, and metabolism. These proteome-scale data suggest that the coral host and its intracellular dinoflagellates have differing strategies for acclimating to elevated temperatures.
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Affiliation(s)
- Anderson B. Mayfield
- Khaled bin Sultan Living Oceans Foundation, Annapolis, MD, United States of America
- Taiwan Coral Research Center, Checheng, Pingtung, Taiwan
- * E-mail:
| | - Yi-Jyun Chen
- Taiwan Coral Research Center, Checheng, Pingtung, Taiwan
| | - Chi-Yu Lu
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Center for Research Resources and Development, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chii-Shiarng Chen
- Taiwan Coral Research Center, Checheng, Pingtung, Taiwan
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan
- Graduate Institute of Marine Biotechnology, National Dong-Hwa University, Checheng, Pingtung, Taiwan
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20
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Mayfield AB, Chen YJ, Lu CY, Chen CS. Exploring the Environmental Physiology of the Indo-Pacific Reef Coral <em>Seriatopora hystrix</em> with Differential Proteomics. ACTA ACUST UNITED AC 2018. [DOI: 10.4236/ojms.2018.82012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Mayfield AB, Wang YB, Chen CS, Chen SH, Lin CY. Dual-compartmental transcriptomic + proteomic analysis of a marine endosymbiosis exposed to environmental change. Mol Ecol 2017; 25:5944-5958. [PMID: 27778414 DOI: 10.1111/mec.13896] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 10/07/2016] [Accepted: 10/10/2016] [Indexed: 12/24/2022]
Abstract
As significant anthropogenic pressures are putting undue stress on the world's oceans, there has been a concerted effort to understand how marine organisms respond to environmental change. Transcriptomic approaches, in particular, have been readily employed to document the mRNA-level response of a plethora of marine invertebrates exposed to an array of simulated stress scenarios, with the tacit and untested assumption being that the respective proteins show a corresponding trend. To better understand the degree of congruency between mRNA and protein expression in an endosymbiotic marine invertebrate, mRNAs and proteins were sequenced from the same samples of the common, Indo-Pacific coral Seriatopora hystrix exposed to stable or upwelling-simulating conditions for 1 week. Of the 167 proteins downregulated at variable temperature, only two were associated with mRNAs that were also differentially expressed between treatments. Of the 378 differentially expressed genes, none were associated with a differentially expressed protein. Collectively, these results highlight the inherent risk of inferring cellular behaviour based on mRNA expression data alone and challenge the current, mRNA-focused approach taken by most marine and many molecular biologists.
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Affiliation(s)
- Anderson B Mayfield
- National Museum of Marine Biology and Aquarium, 2 Houwan Road, Checheng, Pingtung, 944, Taiwan.,Living Oceans Foundation, 130 Severn Avenue, Annapolis, MD, 21403, USA
| | - Yu-Bin Wang
- Graduate Institute of Zoology, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei, 106, Taiwan.,Institute of Information Sciences, Academia Sinica, 128 Academia Road, Sec. 2, Nangang, Taipei, 115, Taiwan
| | - Chii-Shiarng Chen
- National Museum of Marine Biology and Aquarium, 2 Houwan Road, Checheng, Pingtung, 944, Taiwan.,Taiwan Coral Research Center, 2 Houwan Road, Checheng, Pingtung, 944, Taiwan.,Graduate Institute of Marine Biotechnology, National Dong-Hwa University, 2 Houwan Road, Checheng, Pingtung, 944, Taiwan.,Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, 70 Lianhai Road, Kaohsiung, 80424, Taiwan
| | - Shu-Hwa Chen
- Institute of Information Sciences, Academia Sinica, 128 Academia Road, Sec. 2, Nangang, Taipei, 115, Taiwan
| | - Chung-Yen Lin
- Institute of Information Sciences, Academia Sinica, 128 Academia Road, Sec. 2, Nangang, Taipei, 115, Taiwan.,Institute of Fisheries Science, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei, 106, Taiwan.,Institute of Population Health Sciences, National Health Research Institutes, 5 Keyan Road, Zhunan, Miaoli, 350, Taiwan
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22
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Kitchen SA, Poole AZ, Weis VM. Sphingolipid Metabolism of a Sea Anemone Is Altered by the Presence of Dinoflagellate Symbionts. THE BIOLOGICAL BULLETIN 2017; 233:242-254. [PMID: 29553817 DOI: 10.1086/695846] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In host-microbe interactions, signaling lipids function in interpartner communication during both the establishment and maintenance of associations. Previous evidence suggests that sphingolipids play a role in the mutualistic cnidarian-Symbiodinium symbiosis. Exogenously applied sphingolipids have been shown to alter this partnership, though endogenous host regulation of sphingolipids by the sphingosine rheostat under different symbiotic conditions has not been characterized. The rheostat regulates levels of pro-survival sphingosine-1-phosphate (S1P) and pro-apoptotic sphingosine (Sph) through catalytic activities of sphingosine kinase (SPHK) and S1P phosphatase (SGPP). The role of the rheostat in recognition and establishment of cnidarian-Symbiodinium symbiosis was investigated in the sea anemone Aiptasia pallida by measuring gene expression, protein levels, and sphingolipid metabolites in symbiotic, aposymbiotic, and newly recolonized anemones. Comparison of two host populations showed that symbiotic animals from one population had lower SGPP gene expression and Sph lipid concentrations compared to aposymbiotic animals, while the other population had higher S1P concentrations than their aposymbiotic counterparts. In both populations, the host rheostat trended toward host cell survival in the presence of symbionts. Furthermore, upregulation of both rheostat enzymes on the first day of host recolonization by symbionts suggests a role for the rheostat in host-symbiont recognition during symbiosis onset. Collectively, these data suggest a regulatory role of sphingolipid signaling in cnidarian-Symbiodinium symbiosis and symbiont uptake.
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Key Words
- Ct, cycle threshold
- GMP, Gisele Muller-Parker population
- LPS, lipopolysaccharide
- MAMP, microbe-associated molecular pattern
- NSL, no symbionts + light treatment group
- S1P, sphingosine-1-phosphate
- SD, symbionts + dark treatment group
- SGPP, sphingosine-1-phosphate phosphatase
- SL, symbionts + light treatment group
- SPHK, sphingosine kinase
- Sph, sphingosine
- VWA, Weis Lab population A
- qPCR, quantitative polymerase chain reaction
- rt, room temperature
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23
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Mayfield AB, Chen CS, Dempsey AC. Biomarker profiling in reef corals of Tonga's Ha'apai and Vava'u archipelagos. PLoS One 2017; 12:e0185857. [PMID: 29091723 PMCID: PMC5665425 DOI: 10.1371/journal.pone.0185857] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 09/20/2017] [Indexed: 01/04/2023] Open
Abstract
Given the significant threats towards Earth's coral reefs, there is an urgent need to document the current physiological condition of the resident organisms, particularly the reef-building scleractinians themselves. Unfortunately, most of the planet's reefs are understudied, and some have yet to be seen. For instance, the Kingdom of Tonga possesses an extensive reef system, with thousands of hectares of unobserved reefs; little is known about their ecology, nor is there any information on the health of the resident corals. Given such knowledge deficiencies, 59 reefs across three Tongan archipelagos were surveyed herein, and pocilloporid corals were sampled from approximately half of these surveyed sites; 10 molecular-scale response variable were assessed in 88 of the sampled colonies, and 12 colonies were found to be outliers based on employment of a multivariate statistics-based aberrancy detection system. These outliers differed from the statistically normally behaving colonies in having not only higher RNA/DNA ratios but also elevated expression levels of three genes: 1) Symbiodinium zinc-induced facilitator-like 1-like, 2) host coral copper-zinc superoxide dismutase, and 3) host green fluorescent protein-like chromoprotein. Outliers were also characterized by significantly higher variation amongst the molecular response variables assessed, and the response variables that contributed most significantly to colonies being delineated as outliers differed between the two predominant reef coral species sampled, Pocillopora damicornis and P. acuta. These closely related species also displayed dissimilar temporal fluctuation patterns in their molecular physiologies, an observation that may have been driven by differences in their feeding strategies. Future works should attempt to determine whether corals displaying statistically aberrant molecular physiology, such as the 12 Tongan outliers identified herein, are indeed characterized by a diminished capacity for acclimating to the rapid changes in their abiotic milieu occurring as a result of global climate change.
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Affiliation(s)
- Anderson B. Mayfield
- National Museum of Marine Biology and Aquarium, Checheng, Pingtung, Taiwan
- Khaled bin Sultan Living Oceans Foundation, Annapolis, Maryland, United States of America
- Taiwan Coral Research Center, Checheng, Pingtung, Taiwan
- * E-mail:
| | - Chii-Shiarng Chen
- National Museum of Marine Biology and Aquarium, Checheng, Pingtung, Taiwan
- Taiwan Coral Research Center, Checheng, Pingtung, Taiwan
- Graduate Institute of Marine Biotechnology, National Dong-Hwa University, Checheng, Pingtung, Taiwan
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Alexandra C. Dempsey
- Khaled bin Sultan Living Oceans Foundation, Annapolis, Maryland, United States of America
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24
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Conlan JA, Rocker MM, Francis DS. A comparison of two common sample preparation techniques for lipid and fatty acid analysis in three different coral morphotypes reveals quantitative and qualitative differences. PeerJ 2017; 5:e3645. [PMID: 28785524 PMCID: PMC5544933 DOI: 10.7717/peerj.3645] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 07/13/2017] [Indexed: 01/07/2023] Open
Abstract
Lipids are involved in a host of biochemical and physiological processes in corals. Therefore, changes in lipid composition reflect changes in the ecology, nutrition, and health of corals. As such, accurate lipid extraction, quantification, and identification is critical to obtain comprehensive insight into a coral’s condition. However, discrepancies exist in sample preparation methodology globally, and it is currently unknown whether these techniques generate analogous results. This study compared the two most common sample preparation techniques for lipid analysis in corals: (1) tissue isolation by air-spraying and (2) crushing the coral in toto. Samples derived from each preparation technique were subsequently analysed to quantify lipids and their constituent classes and fatty acids in four common, scleractinian coral species representing three distinct morphotypes (Acropora millepora, Montipora crassotuberculata, Porites cylindrica, and Pocillopora damicornis). Results revealed substantial amounts of organic material, including lipids, retained in the skeletons of all species following air-spraying, causing a marked underestimation of total lipid concentration using this method. Moreover, lipid class and fatty acid compositions between the denuded skeleton and sprayed tissue were substantially different. In particular, the majority of the total triacylglycerol and total fatty acid concentrations were retained in the skeleton (55–69% and 56–64%, respectively). As such, the isolated, sprayed tissue cannot serve as a reliable proxy for lipid quantification or identification in the coral holobiont. The in toto crushing method is therefore recommended for coral sample preparation prior to lipid analysis to capture the lipid profile of the entire holobiont, permitting accurate diagnoses of coral condition.
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Affiliation(s)
- Jessica A Conlan
- School of Life and Environmental Sciences, Deakin University, Warrnambool, Victoria, Australia.,Australian Institute of Marine Science, Townsville, Queensland, Australia
| | - Melissa M Rocker
- School of Life and Environmental Sciences, Deakin University, Geelong, Victoria, Australia
| | - David S Francis
- School of Life and Environmental Sciences, Deakin University, Warrnambool, Victoria, Australia.,Australian Institute of Marine Science, Townsville, Queensland, Australia
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Huang KJ, Huang ZY, Lin CY, Wang LH, Chou PH, Chen CS, Li HH. Generation of clade- and symbiont-specific antibodies to characterize marker molecules during Cnidaria-Symbiodinium endosymbiosis. Sci Rep 2017; 7:5488. [PMID: 28710419 PMCID: PMC5511166 DOI: 10.1038/s41598-017-05945-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 06/06/2017] [Indexed: 01/24/2023] Open
Abstract
The endosymbiosis between cnidarians and dinoflagellates is responsible for the formation of coral reefs. Changes in molecules have been identified during the process of cnidaria-Symbiodinium endosymbiosis. However, the complexity of the molecular interaction has prevented the establishment of a mechanistic explanation of cellular regulation in this mutualistic symbiosis. To date, no marker molecules have been identified to specifically represent the symbiotic status. Because the endosymbiotic association occurs in the symbiotic gastrodermal cells (SGCs), whole cells of isolated SGCs were used as an antigen to generate monoclonal antibodies (mAb) to screen possible molecular candidates of symbiotic markers. The results showed that one of the generated monoclonal antibodies, 2–6F, specifically recognized clade C symbiotic Symbiodinium but not its free-living counterpart or other Symbiodinium clades. The expression levels of 2–6F mAb-recognized proteins are highly correlated with the symbiotic status, and these proteins were characterized as N-linked glycoproteins via treatment with peptide N-glycosidase F. Furthermore, their glycan moieties were markedly different from those of free-living Symbiodinium, potentially suggesting host regulation of post-translational modification. Consequently, the 2–6F mAb can be used to detect the symbiotic state of corals and investigate the complex molecular interactions in cnidaria-Symbiodinium endosymbiosis.
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Affiliation(s)
- Kao-Jean Huang
- Institute of Biologics, Development Center for Biotechnology, New Taipei City, 22180, Taiwan
| | - Zi-Yu Huang
- Graduate Institute of Marine Biology, National Dong-Hwa University, Pingtung, 94450, Taiwan
| | - Ching-Yen Lin
- Department of Life Science, National Dong Hwa University, Hualien, 97401, Taiwan
| | - Li-Hsueh Wang
- Graduate Institute of Marine Biology, National Dong-Hwa University, Pingtung, 94450, Taiwan.,Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Pingtung, 94450, Taiwan
| | - Pin-Hsiang Chou
- Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Pingtung, 94450, Taiwan
| | - Chii-Shiarng Chen
- Graduate Institute of Marine Biology, National Dong-Hwa University, Pingtung, 94450, Taiwan. .,Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Pingtung, 94450, Taiwan. .,Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, 80424, Taiwan.
| | - Hsing-Hui Li
- Graduate Institute of Marine Biology, National Dong-Hwa University, Pingtung, 94450, Taiwan. .,Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Pingtung, 94450, Taiwan.
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Chen HK, Wang LH, Chen WNU, Mayfield AB, Levy O, Lin CS, Chen CS. Coral lipid bodies as the relay center interconnecting diel-dependent lipidomic changes in different cellular compartments. Sci Rep 2017; 7:3244. [PMID: 28607345 PMCID: PMC5468245 DOI: 10.1038/s41598-017-02722-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 04/18/2017] [Indexed: 11/09/2022] Open
Abstract
Lipid bodies (LBs) in the coral gastrodermal tissues are key organelles in the regulation of endosymbiosis and exhibit a diel rhythmicity. Using the scleractinian Euphyllia glabrescens collected across the diel cycle, we observed temporally dynamic lipid profiles in three cellular compartments: host coral gastrodermal cells, LBs, and in hospite Symbiodinium. Particularly, the lipidome varied over time, demonstrating the temporally variable nature of the coral-Symbiodinium endosymbiosis. The lipidome-scale data highlight the dynamic, light-driven metabolism of such associations and reveal that LBs are not only lipid storage organelles but also act as a relay center in metabolic trafficking. Furthermore, lipogenesis in LBs is significantly regulated by coral hosts and the lipid metabolites within holobionts featured predominantly triacylglycerols, sterol esters, and free fatty acids. Given these findings through a time-varied lipidome status, the present study provided valuable insights likely to be crucial to understand the cellular biology of the coral-Symbiodinium endosymbiosis.
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Affiliation(s)
- Hung-Kai Chen
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 804, Taiwan
| | - Li-Hsueh Wang
- Graduate Institute of Marine Biology, National Dong-Hwa University, Checheng, Pingtung, 944, Taiwan
- Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Checheng, Pingtung, 944, Taiwan
| | - Wan-Nan U Chen
- Department of Biological Science and Technology, I-Shou University, Kaohsiung, 824, Taiwan
| | - Anderson B Mayfield
- Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Checheng, Pingtung, 944, Taiwan
- Khaled bin Sultan Living Oceans Foundation, Annapolis, MD, 21403, United States of America
| | - Oren Levy
- The Mina and Everard Goodman Faculty of Life Sciences, Bar Ilan University, Ramat Gan, 52900, Israel
| | - Chan-Shing Lin
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 804, Taiwan
| | - Chii-Shiarng Chen
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 804, Taiwan.
- Graduate Institute of Marine Biology, National Dong-Hwa University, Checheng, Pingtung, 944, Taiwan.
- Taiwan Coral Research Center, National Museum of Marine Biology and Aquarium, Checheng, Pingtung, 944, Taiwan.
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Mayfield AB, Chen CS, Dempsey AC. Identifying corals displaying aberrant behavior in Fiji's Lau Archipelago. PLoS One 2017; 12:e0177267. [PMID: 28542245 PMCID: PMC5443480 DOI: 10.1371/journal.pone.0177267] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 04/25/2017] [Indexed: 12/04/2022] Open
Abstract
Given the numerous threats against Earth’s coral reefs, there is an urgent need to develop means of assessing reef coral health on a proactive timescale. Molecular biomarkers may prove useful in this endeavor because their expression should theoretically undergo changes prior to visible signs of health decline, such as the breakdown of the coral-dinoflagellate (genus Symbiodinium) endosymbiosis. Herein 13 molecular- and physiological-scale biomarkers spanning both eukaryotic compartments of the anthozoan-Symbiodinium mutualism were assessed across 70 pocilloporid coral colonies sampled from reefs of Fiji’s easternmost province, Lau. Eleven colonies were identified as outliers upon employment of a detection method based partially on the Mahalanobis distance; these corals were hypothesized to have been displaying aberrant sub-cellular behavior with respect to their gene expression signatures, as they were characterized not only by lower Symbiodinium densities, but also by higher levels of expression of several stress-targeted genes. Although these findings could suggest that the sampled colonies were physiologically compromised at the time of sampling, further studies are warranted to state conclusively whether these 11 scleractinian coral colonies are more stress-prone than nearby conspecifics that demonstrated statistically normal phenotypes.
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Affiliation(s)
- Anderson B. Mayfield
- National Museum of Marine Biology and Aquarium, Checheng, Pingtung, Taiwan
- Khaled bin Sultan Living Oceans Foundation, Annapolis, MD, United States of America
- Taiwan Coral Research Center, Checheng, Pingtung, Taiwan
- * E-mail:
| | - Chii-Shiarng Chen
- National Museum of Marine Biology and Aquarium, Checheng, Pingtung, Taiwan
- Taiwan Coral Research Center, Checheng, Pingtung, Taiwan
- Graduate Institute of Marine Biotechnology, National Dong Hwa University, Checheng, Pingtung, Taiwan
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Alexandra C. Dempsey
- Khaled bin Sultan Living Oceans Foundation, Annapolis, MD, United States of America
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Uncovering Spatio-Temporal and Treatment-Derived Differences in the Molecular Physiology of a Model Coral-Dinoflagellate Mutualism with Multivariate Statistical Approaches. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2016. [DOI: 10.3390/jmse4030063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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