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  Low temperature tolerance of the Antarctic species Deschampsia antarctica: a complex metabolic response associated with nutrient remobilization

Clemente-Moreno, M., Omranian, N., Sáez, P., Figueroa, C., Del-Saz, N., Elso, M., et al. (2020). Low temperature tolerance of the Antarctic species Deschampsia antarctica: a complex metabolic response associated with nutrient remobilization. Plant, Cell and Environment, 43(6), 1376-1393. doi:10.1111/pce.13737.

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Clemente-Moreno, MJ1, Autor
Omranian, N.2, Autor           
Sáez, PL1, Autor
Figueroa, CM1, Autor
Del-Saz, N1, Autor
Elso, M1, Autor
Poblete, L1, Autor
Orf, I1, Autor
Cuadros-Inostroza, A1, Autor
Cavieres, L.A.1, Autor
Bravo, L1, Autor
Fernie, A. R.3, Autor           
Ribas-Carbó, M1, Autor
Flexas, J1, Autor
Nikoloski, Z.2, Autor           
Brotman, Y1, Autor
Gago, J1, 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: membrane stabilization, nutrient mobilization, osmoprotection, Photosynthesis, primary metabolism, stress antioxidant response
 Zusammenfassung: ABSTRACT The species Deschampsia antarctica (DA) is one of the only two native vascular species that live in Antarctica. We performed ecophysiological, biochemical and metabolomic studies to investigate the responses of DA to low temperature. In parallel, we assessed the responses in a non-Antarctic reference species (Triticum aestivum, TA) from the same family (Poaceae). At low temperature (4°C), both species showed lower photosynthetic rates (reductions were 70 and 80% for DA and TA, respectively) and symptoms of oxidative stress, but opposite responses of antioxidant enzymes (peroxidases and catalase). We employed fused LASSO statistical modelling to associate the species-dependent physiological and antioxidant responses to primary metabolism. Model results for DA indicated associations with osmoprotection, cell wall remodelling, membrane stabilization and antioxidant secondary metabolism (synthesis of flavonols and phenylpropanoids), coordinated with nutrient mobilization from source-to-sink tissues (confirmed by elemental analysis), which were not observed in TA. The metabolic behaviour of DA, with significant changes in particular metabolites, was compared with a newly compiled multi-species dataset showing a general accumulation of metabolites in response to low temperatures. Altogether, the responses displayed by DA suggest a compromise between catabolism and maintenance of leaf functionality. This article is protected by copyright. All rights reserved.

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Sprache(n): eng - English
 Datum: 2020
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1111/pce.13737
BibTex Citekey: doi:10.1111/pce.13737
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Titel: Plant, Cell and Environment
  Andere : Plant, Cell & Environment
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Oxford, England : Blackwell Science
Seiten: - Band / Heft: 43 (6) Artikelnummer: - Start- / Endseite: 1376 - 1393 Identifikator: ISSN: 0140-7791
CoNE: https://pure.mpg.de/cone/journals/resource/954925471334