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  Cytochrome respiration pathway and sulphur metabolism sustain stress tolerance to low temperature in the Antarctic species Colobanthus quitensis

Clemente-Moreno, J. M., Omranian, N., Sáez, P., Figueroa, C. M., Del-Saz, N., Elso, M., et al. (2019). Cytochrome respiration pathway and sulphur metabolism sustain stress tolerance to low temperature in the Antarctic species Colobanthus quitensis. New Phytologist, 225(2), 754-768. doi:10.1111/nph.16167.

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Clemente-Moreno, José María1, Autor
Omranian, N.2, Autor           
Sáez, Patricia1, Autor
Figueroa, Carlos María1, Autor
Del-Saz, Néstor1, Autor
Elso, Mhartyn1, Autor
Poblete, Leticia1, Autor
Orf, Isabel1, Autor
Cuadros-Inostroza, Alvaro1, Autor
Cavieres, Lohengrin1, Autor
Bravo, León1, Autor
Fernie, A. R.3, Autor           
Ribas-Carbó, Miquel1, Autor
Flexas, Jaume1, Autor
Nikoloski, Z.2, Autor           
Brotman, Yariv1, Autor
Gago, Jorge1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Mathematical Modelling and Systems Biology - Nikoloski, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753310              
3Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              

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Schlagwörter: Stress tolerance, Antarctica, antioxidant capacity, respiration, low temperature, photosynthesis, sulphur metabolism
 Zusammenfassung: Abstract -Understanding the strategies employed by plant species that live in extreme environments offers the possibility to discover stress tolerance mechanisms. We studied the physiological, antioxidant and metabolic responses to three temperature conditions (4, 15 and 23ºC) of Colobanthus quitensis (CQ), one of the only two native vascular species in Antarctica. We also employed Dianthus chinensis (DC), to asssess the effects of the treatments in a non-antarctic species from the same family. -Using fused LASSO modeling we associated physiological and biochemical antioxidant responses with primary metabolism. This approach allowed us to highlight the metabolic pathways driving the response specific to CQ. -Low temperature imposed dramatic reductions in photosynthesis (up to 88%) but not in respiration (sustaining rates of 3.0-4.2 µmol CO2 m-2 s-1) in CQ, and any change in the physiological stress parameters was found. Its notable antioxidant capacity and mitochondrial cytochrome respiratory activity (20 and 2 times higher than DC, respectively) which ensure ATP production even at low temperature, was significantly associated to sulphur-containing metabolites and polyamines. -Our findings potentially open new biotechnological opportunities regarding the role of antioxidant compounds and respiratory mechanisms associated to sulphur metabolism in stress tolerance strategies to low temperature. This article is protected by copyright. All rights reserved.

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Sprache(n): eng - English
 Datum: 2019
 Publikationsstatus: Online veröffentlicht
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1111/nph.16167
BibTex Citekey: doi:10.1111/nph.16167
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Titel: New Phytologist
  Andere : New Phytol.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Academic Press.
Seiten: - Band / Heft: 225 (2) Artikelnummer: - Start- / Endseite: 754 - 768 Identifikator: ISSN: 0028-646X
CoNE: https://pure.mpg.de/cone/journals/resource/954925334695