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Prelle LR, Schmidt I, Schimani K, Zimmermann J, Abarca N, Skibbe O, Juchem D, Karsten U. Photosynthetic, Respirational, and Growth Responses of Six Benthic Diatoms from the Antarctic Peninsula as Functions of Salinity and Temperature Variations. Genes (Basel) 2022; 13:genes13071264. [PMID: 35886047 PMCID: PMC9324188 DOI: 10.3390/genes13071264] [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: 06/28/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 02/04/2023] Open
Abstract
Temperature and salinity are some of the most influential abiotic parameters shaping biota in aquatic ecosystems. In recent decades, climate change has had a crucial impact on both factors—especially around the Antarctic Peninsula—with increasing air and water temperature leading to glacial melting and the accompanying freshwater increase in coastal areas. Antarctic soft and hard bottoms are typically inhabited by microphytobenthic communities, which are often dominated by benthic diatoms. Their physiology and primary production are assumed to be negatively affected by increased temperatures and lower salinity. In this study, six representative benthic diatom strains were isolated from different aquatic habitats at King George Island, Antarctic Peninsula, and comprehensively identified based on molecular markers and morphological traits. Photosynthesis, respiration, and growth response patterns were investigated as functions of varying light availability, temperature, and salinity. Photosynthesis−irradiance curve measurements pointed to low light requirements, as light-saturated photosynthesis was reached at <70 µmol photons m−2 s−1. The marine isolates exhibited the highest effective quantum yield between 25 and 45 SA (absolute salinity), but also tolerance to lower and higher salinities at 1 SA and 55 SA, respectively, and in a few cases even <100 SA. In contrast, the limnic isolates showed the highest effective quantum yield at salinities ranging from 1 SA to 20 SA. Almost all isolates exhibited high effective quantum yields between 1.5 °C and 25 °C, pointing to a broad temperature tolerance, which was supported by measurements of the short-term temperature-dependent photosynthesis. All studied Antarctic benthic diatoms showed activity patterns over a broader environmental range than they usually experience in situ. Therefore, it is likely that their high ecophysiological plasticity represents an important trait to cope with climate change in the Antarctic Peninsula.
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Affiliation(s)
- Lara R. Prelle
- Applied Ecology and Phycology, Institute of Biological Sciences, Albert-Einstein-Strasse 3, University of Rostock, 18057 Rostock, Germany; (L.R.P.); (I.S.); (D.J.)
| | - Ina Schmidt
- Applied Ecology and Phycology, Institute of Biological Sciences, Albert-Einstein-Strasse 3, University of Rostock, 18057 Rostock, Germany; (L.R.P.); (I.S.); (D.J.)
| | - Katherina Schimani
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, 14163 Berlin, Germany; (K.S.); (J.Z.); (N.A.); (O.S.)
| | - Jonas Zimmermann
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, 14163 Berlin, Germany; (K.S.); (J.Z.); (N.A.); (O.S.)
| | - Nelida Abarca
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, 14163 Berlin, Germany; (K.S.); (J.Z.); (N.A.); (O.S.)
| | - Oliver Skibbe
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, 14163 Berlin, Germany; (K.S.); (J.Z.); (N.A.); (O.S.)
| | - Desiree Juchem
- Applied Ecology and Phycology, Institute of Biological Sciences, Albert-Einstein-Strasse 3, University of Rostock, 18057 Rostock, Germany; (L.R.P.); (I.S.); (D.J.)
| | - Ulf Karsten
- Applied Ecology and Phycology, Institute of Biological Sciences, Albert-Einstein-Strasse 3, University of Rostock, 18057 Rostock, Germany; (L.R.P.); (I.S.); (D.J.)
- Correspondence:
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Becker B, Feng X, Yin Y, Holzinger A. Desiccation tolerance in streptophyte algae and the algae to land plant transition: evolution of LEA and MIP protein families within the Viridiplantae. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3270-3278. [PMID: 32107542 PMCID: PMC7289719 DOI: 10.1093/jxb/eraa105] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 02/10/2020] [Indexed: 05/04/2023]
Abstract
The present review summarizes the effects of desiccation in streptophyte green algae, as numerous experimental studies have been performed over the past decade particularly in the early branching streptophyte Klebsormidium sp. and the late branching Zygnema circumcarinatum. The latter genus gives its name to the Zygenmatophyceae, the sister group to land plants. For both organisms, transcriptomic investigations of desiccation stress are available, and illustrate a high variability in the stress response depending on the conditions and the strains used. However, overall, the responses of both organisms to desiccation stress are very similar to that of land plants. We highlight the evolution of two highly regulated protein families, the late embryogenesis abundant (LEA) proteins and the major intrinsic protein (MIP) family. Chlorophytes and streptophytes encode LEA4 and LEA5, while LEA2 have so far only been found in streptophyte algae, indicating an evolutionary origin in this group. Within the MIP family, a high transcriptomic regulation of a tonoplast intrinsic protein (TIP) has been found for the first time outside the embryophytes in Z. circumcarinatum. The MIP family became more complex on the way to terrestrialization but simplified afterwards. These observations suggest a key role for water transport proteins in desiccation tolerance of streptophytes.
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Affiliation(s)
| | - Xuehuan Feng
- University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Yanbin Yin
- University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Andreas Holzinger
- University of Innsbruck, Department of Botany, Innsbruck, Austria
- Correspondence:
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Stoyneva-Gärtner M, Uzunov B, Gärtner G, Radkova M, Atanassov I, Atanasova R, Borisova C, Draganova P, Stoykova P. Review on the biotechnological and nanotechnological potential of the streptophyte genus Klebsormidium with pilot data on its phycoprospecting and polyphasic identification in Bulgaria. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2019.1593887] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Maya Stoyneva-Gärtner
- Department of Botany, Faculty of Biology, Sofia University “St. Kliment Ohridski”, Sofia, Bulgaria
| | - Blagoy Uzunov
- Department of Botany, Faculty of Biology, Sofia University “St. Kliment Ohridski”, Sofia, Bulgaria
| | - Georg Gärtner
- Institut für Botanik, Fakultät für Biologie, Universität Innsbruck, Innsbruck, Austria
| | - Mariana Radkova
- Functional Genetics Legumes Group, AgroBioInstitute, Agricultural Academy, Sofia, Bulgaria
| | - Ivan Atanassov
- Molecular Genetics Group, AgroBioInstitute, Agricultural Academy, Sofia, Bulgaria
| | - Ralitsa Atanasova
- Department of Botany, Faculty of Biology, Sofia University “St. Kliment Ohridski”, Sofia, Bulgaria
| | - Cvetanka Borisova
- Department of Botany, Faculty of Biology, Sofia University “St. Kliment Ohridski”, Sofia, Bulgaria
| | - Petya Draganova
- Department of Botany, Faculty of Biology, Sofia University “St. Kliment Ohridski”, Sofia, Bulgaria
| | - Petya Stoykova
- Functional Genetics Legumes Group, AgroBioInstitute, Agricultural Academy, Sofia, Bulgaria
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Pierangelini M, Glaser K, Mikhailyuk T, Karsten U, Holzinger A. Light and Dehydration but Not Temperature Drive Photosynthetic Adaptations of Basal Streptophytes (Hormidiella, Streptosarcina and Streptofilum) Living in Terrestrial Habitats. MICROBIAL ECOLOGY 2019; 77:380-393. [PMID: 29974184 PMCID: PMC6394494 DOI: 10.1007/s00248-018-1225-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 06/24/2018] [Indexed: 05/05/2023]
Abstract
Streptophyte algae are the ancestors of land plants, and several classes contain taxa that are adapted to an aero-terrestrial lifestyle. In this study, four basal terrestrial streptophytes from the class Klebsormidiophyceae, including Hormidiella parvula; two species of the newly described genus Streptosarcina (S. costaricana and S. arenaria); and the newly described Streptofilum capillatum were investigated for their responses to radiation, desiccation and temperature stress conditions. All the strains showed low-light adaptation (Ik < 70 μmol photons m-2 s-1) but differed in photoprotective capacities (such as non-photochemical quenching). Acclimation to enhanced photon fluence rates (160 μmol photons m-2 s-1) increased photosynthetic performance in H. parvula and S. costaricana but not in S. arenaria, showing that low-light adaptation is a constitutive trait for S. arenaria. This lower-light adaptation of S. arenaria was coupled with a higher desiccation tolerance, providing further evidence that dehydration is a selective force shaping species occurrence in low light. For protection against ultraviolet radiation, all species synthesised and accumulated different amounts of mycosporine-like amino acids (MAAs). Biochemically, MAAs synthesised by Hormidiella and Streptosarcina were similar to MAAs from closely related Klebsormidium spp. but differed in retention time and spectral characteristics in S. capillatum. Unlike the different radiation and dehydration tolerances, Hormidiella, Streptosarcina and Streptofilum displayed preferences for similar thermal conditions. These species showed a temperature dependence of photosynthesis similar to respiration, contrasting with Klebsormidium spp. and highlighting an interspecific diversity in thermal requirements, which could regulate species distributions under temperature changes.
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Affiliation(s)
- Mattia Pierangelini
- Department of Botany, Functional Plant Biology, University of Innsbruck, 6020, Innsbruck, Austria
- Laboratoire de Génétique et Physiologie des microalgues, InBioS/Phytosystems, Institut de Botanique, Université de Liège, Liege, 4000, Belgium
| | - Karin Glaser
- Applied Ecology and Phycology, Institute of Biological Sciences, University of Rostock, Albert-Einstein-Strasse 3, 18059, Rostock, Germany
| | - Tatiana Mikhailyuk
- M.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, Tereschenkivska Str. 2, Kyiv, 01004, Ukraine
| | - Ulf Karsten
- Applied Ecology and Phycology, Institute of Biological Sciences, University of Rostock, Albert-Einstein-Strasse 3, 18059, Rostock, Germany
| | - Andreas Holzinger
- Department of Botany, Functional Plant Biology, University of Innsbruck, 6020, Innsbruck, Austria.
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Photosynthetic performance of freshwater green microalgae Chlorella vulgaris to air-drying treatment. Biologia (Bratisl) 2018. [DOI: 10.2478/s11756-018-00172-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Munk M, Brandão HM, Yéprémian C, Couté A, Ladeira LO, Raposo NRB, Brayner R. Effect of Multi-walled Carbon Nanotubes on Metabolism and Morphology of Filamentous Green Microalgae. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 73:649-658. [PMID: 28687867 DOI: 10.1007/s00244-017-0429-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 06/27/2017] [Indexed: 06/07/2023]
Abstract
Multi-walled carbon nanotubes (MWCNTs) have potential applications in the industrial, agricultural, pharmaceutical, medical, and environmental remediation fields. However, many uncertainties exist regarding the environmental implications of engineered nanomaterials. This study examined the effect of the MWCNTs on metabolic status and morphology of filamentous green microalgae Klebsormidium flaccidum. Appropriate concentrations of MWCNT (1, 50, and 100 μg mL-1) were added to a microalgal culture in the exponential growth phase and incubated for 24, 48, 72, and 96 h. Exposure to MWCNT led to reductions in algal growth after 48 h and decreased on cell viability for all experimental endpoints except for 1 µg mL-1 at 24 h and 100 µg mL-1 after 72 h. At 100 µg mL-1, MWCNTs induced reactive oxygen species (ROS) production and had an effect on intracellular adenosine triphosphate (ATP) content depending on concentration and time. No photosynthetic activity variation was observed. Observations by scanning transmission electron microscopy showed cell damage. In conclusion, we have demonstrated that exposure to MWCNTs affects cell metabolism and microalgal cell morphology. To our best knowledge, this is the first case in which MWCNTs exhibit adverse effects on filamentous green microalgae K. flaccidum. These results contribute to elucidate the mechanism of MWCNT nanotoxicity in the bioindicator organism of terrestrial and freshwater habitats.
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Affiliation(s)
- Michele Munk
- Department of Biology, Federal University of Juiz de Fora, José Lourenço Kelmer, Campus Universitário, Juiz De Fora, 36036-900, Brazil.
| | - Humberto M Brandão
- Laboratory of Nanotechnology, Brazilian Agricultural Research Corporation (EMBRAPA), Juiz De Fora, 36038-330, Brazil
| | - Claude Yéprémian
- National Museum of Natural History, Communication Molecules and Adaptation of Microorganisms, UMR 7245, Paris, France
| | - Alain Couté
- National Museum of Natural History, Communication Molecules and Adaptation of Microorganisms, UMR 7245, Paris, France
| | - Luiz O Ladeira
- Department of Physics, Federal University of Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | - Nádia R B Raposo
- Nucleus of Analytical Identification and Quantification (NIQUA), Federal University of Juiz de Fora, Juiz De Fora, 36036-900, Brazil
| | - Roberta Brayner
- University of Paris Diderot, Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS), UMR 7086, Paris, France
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