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Dynamic Changes in Arabinogalactan-Protein, Pectin, Xyloglucan and Xylan Composition o the Cell Wall During Microspore Embryogenesis in Brassica napus

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Dynamic Changes in Arabinogalactan-Protein, Pectin, Xyloglucan and Xylan Composition o the Cell Wall During Microspore Embryogenesis in Brassica napus

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dc.contributor.author Corral Martínez, Patricia es_ES
dc.contributor.author Driouich, Azeddine es_ES
dc.contributor.author Seguí-Simarro, Jose M. es_ES
dc.date.accessioned 2020-05-16T03:00:30Z
dc.date.available 2020-05-16T03:00:30Z
dc.date.issued 2019-03-28 es_ES
dc.identifier.uri http://hdl.handle.net/10251/143434
dc.description.abstract [EN] Microspore embryogenesis is a manifestation of plant cell totipotency whereby new cell walls are formed as a consequence of the embryogenic switch. In particular, the callose-rich subintinal layer created immediately upon induction of embryogenesis was recently related to protection against stress. However, little is currently known about the functional significance of other compositional changes undergone by the walls of embryogenic microspores. We characterized these changes in Brassica napus at different stages during induction of embryogenic microspores and development of microspore-derived embryos (MDEs) by using a series of monoclonal antibodies specific for cell wall components, including arabinogalactan-proteins (AGPs), pectins, xyloglucan and xylan. We used JIM13, JIM8, JIM14 and JIM16 for AGPs, CCRC-M13, LM5, LM6, JIM7, JIM5 and LM7 for pectins, CCRC-M1 and LM15 for xyloglucan, and LM11 for xylan. By transmission electron microscopy and quantification of immunogold labeling on high-pressure frozen, freeze-substituted samples, we profiled the changes in cell wall ultrastructure and composition at the different stages of microspore embryogenesis. As a reference to compare with, we also studied in vivo microspores and maturing pollen grains. We showed that the cell wall of embryogenic microspores is a highly dynamic structure whose architecture, arrangement and composition changes dramatically as microspores undergo embryogenesis and then transform into MDEs. Upon induction, the composition of the preexisting microspore intine walls is remodeled, and unusual walls with a unique structure and composition are formed. Changes in AGP composition were related to developmental fate. In particular, AGPs containing the JIM13 epitope were massively excreted into the cell apoplast, and appeared associated to cell totipotency. According to the ultrastructure and the pectin and xyloglucan composition of these walls, we deduced that commitment to embryogenesis induces the formation of fragile, plastic and deformable cell walls, which allow for cell expansion and microspore growth. We also showed that these special walls are transient, since cell wall composition in microspore-derived embryos was completely different. Thus, once adopted the embryogenic developmental pathway and far from the effects of heat shock exposure, cell wall biosynthesis would approach the structure, composition and properties of conventional cell walls. es_ES
dc.description.sponsorship This work was supported by grant AGL2017-88135-R to JS-S from Spanish MINECO jointly funded by FEDER. AD would like to thank the University of Rouen and Normandie Regional Council (France) for financial support. es_ES
dc.language Inglés es_ES
dc.publisher Frontiers Media SA es_ES
dc.relation MINECO-FEDER/AGL2017-88135-R es_ES
dc.relation.ispartof Frontiers in Plant Science es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Andiugenesis es_ES
dc.subject Cell wall es_ES
dc.subject Doubled haploid es_ES
dc.subject Electron microscopy es_ES
dc.subject Immunogold labeling es_ES
dc.subject Rapeseed es_ES
dc.subject.classification GENETICA es_ES
dc.title Dynamic Changes in Arabinogalactan-Protein, Pectin, Xyloglucan and Xylan Composition o the Cell Wall During Microspore Embryogenesis in Brassica napus es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.3389/fpls.2019.00332 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Biotecnología - Departament de Biotecnologia es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario de Conservación y Mejora de la Agrodiversidad Valenciana - Institut Universitari de Conservació i Millora de l'Agrodiversitat Valenciana es_ES
dc.description.bibliographicCitation Corral Martínez, P.; Driouich, A.; Seguí-Simarro, JM. (2019). Dynamic Changes in Arabinogalactan-Protein, Pectin, Xyloglucan and Xylan Composition o the Cell Wall During Microspore Embryogenesis in Brassica napus. Frontiers in Plant Science. 10:1-17. https://doi.org/10.3389/fpls.2019.00332 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.3389/fpls.2019.00332 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 17 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 10 es_ES
dc.identifier.eissn 1664-462X es_ES
dc.identifier.pmid 30984213 es_ES
dc.identifier.pmcid PMC6447685 es_ES
dc.relation.pasarela S\384593 es_ES
dc.contributor.funder Agencia Estatal de Investigación es_ES
dc.contributor.funder Université de Rouen Normandie es_ES
dc.contributor.funder Conseil Régional de Haute Normandie es_ES
dc.contributor.funder European Regional Development Fund


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