dc.contributor.author | López Pozo, Marina | |
dc.contributor.author | Gasulla, F | |
dc.contributor.author | García Plazaola, José Ignacio | |
dc.contributor.author | Fernández Marín, Beatriz | |
dc.date.accessioned | 2019-07-01T14:36:06Z | |
dc.date.available | 2019-07-01T14:36:06Z | |
dc.date.issued | 2018-11-22 | |
dc.identifier.citation | Plant Science 281 : 251-260 (2019) | es_ES |
dc.identifier.issn | 0168-9452 | |
dc.identifier.uri | http://hdl.handle.net/10810/34504 | |
dc.description | Se sustituye el preprint por el postprint el 23-11-2020 | |
dc.description.abstract | Fern spores are unicellular structures produced by the sporophyte generation that give rise to the haploid gametophyte. When released from the sporangium, spores are desiccation tolerant (DT) in the royal fern (Osmunda regalis) and contain fully developed chloroplasts. As a consequence this type of spores are called chlorophyllous spores (CS). Upon transfer to germination conditions, CS initiate a process of imbibition that suppress DT in 72h, before the germination starts. In parallel to such change in DT, thylakoids undergo a profound remodelling in composition and function. Firstly, sustained quenching of chlorophyll fluorescence is relaxed, giving rise to photochemically active CS, while lipid composition shifts from that of a resting structure to a metabolically active cell. Basically trigalactolipids decreased in favour of monogalactolipids, with a parallel desaturation of fatty acids. Storage lipids such as triacylglycerol were quickly depleted. These results highlight the importance of the structure of thylakoids lipid as a key to protect membrane integrity during desiccation, together with the saturation of fatty acids and the constitutive chlorophyll quenching to prevent oxidative damage. The CS used here, in which the same cell shifts from DT to sensitive strategy in 72h, reveal its their potential as unicellular models for future studies on DT. | es_ES |
dc.description.sponsorship | This work was funded by (i) the Basque Government (research project UPV/EHU IT-1018-16; and Predoctoral Fellowship to MLP); (ii) the Spanish Ministry of Economy and Competitiveness (MINECO) and the ERDF (FEDER) (research project CTM2014-53902-C2-2-P, and Juan de la Cierva-Incorporation fellowship IJCI-2014-22489 to BFM). | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/CTM2014-53902-C2-2-P | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.subject | chlorophyllous spores | es_ES |
dc.subject | fatty acid saturation | es_ES |
dc.subject | germination | es_ES |
dc.subject | galactolipids | es_ES |
dc.subject | non-photochemical quenching | es_ES |
dc.subject | land conquest | es_ES |
dc.title | Unravelling metabolic mechanisms behind chloroplast desiccation tolerance: chlorophyllous fern spore as a new promising unicellular model | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2018 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0 | es_ES |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0168945218308859 | es_ES |
dc.identifier.doi | 10.1016/j.plantsci.2018.11.012 | |
dc.departamentoes | Biología vegetal y ecología | es_ES |
dc.departamentoeu | Landaren biologia eta ekologia | es_ES |