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

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 225(2020), 2 vom: 15. Jan., Seite 754-768
1. Verfasser:	Clemente-Moreno, María José (VerfasserIn)
Weitere Verfasser:	Omranian, Nooshin, Sáez, Patricia, Figueroa, Carlos María, Del-Saz, Néstor, Elso, Mhartyn, Poblete, Leticia, Orf, Isabel, Cuadros-Inostroza, Alvaro, Cavieres, Lohengrin, Bravo, León, Fernie, Alisdair, Ribas-Carbó, Miquel, Flexas, Jaume, Nikoloski, Zoran, Brotman, Yariv, Gago, Jorge
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2020
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't Antarctica antioxidant capacity low temperature photosynthesis respiration stress tolerance sulphur metabolism Antioxidants mehr... Cytochromes Plant Proteins Sulfur 70FD1KFU70 Carbon 7440-44-0 Glutathione GAN16C9B8O

Beschreibung
Zusammenfassung:	© 2019 The Authors. New Phytologist © 2019 New Phytologist Trust. 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°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 μmol 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
Beschreibung:	Date Completed 01.12.2020 Date Revised 01.12.2020 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.16167