Maria Jose Clemente-Moreno, Nooshin Omranian, Patricia Saez, Carlos Maria Figueroa, Nestor Del-Saz, Mhartyn Elso, Leticia Poblete, Isabel Orf, Alvaro Cuadros-Inostroza, Lohengrin Cavieres, Leon Bravo, Alisdair Fernie, Miquel Ribas-Carbo, Jaume Flexas, Zoran Nikoloski, Yariv Brotman, Jorge Gago
- 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 23 degrees C) of Colobanthus quitensis (CQ), one of the only two native vascular species in Antarctica. We also employed Dianthus chinensis (DC), to assess the effects of the treatments in a non-Antarctic species from the same family. Using fused LASSO modelling, 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 mu mol CO2 m(-2) s(-1)) in CQ, and no change in the physiological stress parameters was found. Its notable antioxidant capacity and mitochondrial cytochrome respiratory activity (20 and two times higher thanUnderstanding 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 23 degrees C) of Colobanthus quitensis (CQ), one of the only two native vascular species in Antarctica. We also employed Dianthus chinensis (DC), to assess the effects of the treatments in a non-Antarctic species from the same family. Using fused LASSO modelling, 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 mu mol CO2 m(-2) s(-1)) in CQ, and no change in the physiological stress parameters was found. Its notable antioxidant capacity and mitochondrial cytochrome respiratory activity (20 and two times higher than DC, respectively), which ensure ATP production even at low temperature, was significantly associated with sulphur-containing metabolites and polyamines. Our findings potentially open new biotechnological opportunities regarding the role of antioxidant compounds and respiratory mechanisms associated with sulphur metabolism in stress tolerance strategies to low temperature.…
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MetadatenAuthor details: | Maria Jose Clemente-Moreno, Nooshin OmranianORCiDGND, Patricia Saez, Carlos Maria Figueroa, Nestor Del-SazORCiD, Mhartyn Elso, Leticia Poblete, Isabel Orf, Alvaro Cuadros-Inostroza, Lohengrin CavieresORCiD, Leon Bravo, Alisdair FernieORCiDGND, Miquel Ribas-CarboORCiD, Jaume Flexas, Zoran NikoloskiORCiDGND, Yariv Brotman, Jorge GagoORCiD |
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DOI: | https://doi.org/10.1111/nph.16167 |
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ISSN: | 0028-646X |
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ISSN: | 1469-8137 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/31489634 |
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Title of parent work (English): | New phytologist : international journal of plant science |
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Publisher: | Wiley |
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Place of publishing: | Hoboken |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2019/09/05 |
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Publication year: | 2019 |
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Release date: | 2021/06/03 |
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Tag: | Antarctica; antioxidant capacity; low temperature; photosynthesis; respiration; stress tolerance; sulphur metabolism |
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Volume: | 225 |
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Issue: | 2 |
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Number of pages: | 15 |
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First page: | 754 |
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Last Page: | 768 |
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Funding institution: | Ministerio de Economia y Competitividad (MINECO), Spain [CTM2014-53902-C2-1-P]; ERDF (FEDER, EU funds); MINECO; Becas Santander IberoAmerica; Max Planck Society (Partner Group for Plant Biochemistry); FondecytComision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)CONICYT FONDECYT [11130332]; NEXER-UFRO (Chile) [NXR17-002]; Horizon 2020 Teaming project PlantaSyst (EU); REDES-CONICYT (Chile) [170102] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie |
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| 5 Naturwissenschaften und Mathematik / 58 Pflanzen (Botanik) / 580 Pflanzen (Botanik) |
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Peer review: | Referiert |
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