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Loquat fruit ripening is associated with root depletion. Nutritional and hormonal control

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Loquat fruit ripening is associated with root depletion. Nutritional and hormonal control

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dc.contributor.author Reig Valor, Carmina es_ES
dc.contributor.author Mesejo Conejos, Carlos es_ES
dc.contributor.author Martínez Fuentes, Amparo es_ES
dc.contributor.author Martínez Alcántara, Belén es_ES
dc.contributor.author Agustí Fonfría, Manuel es_ES
dc.date.accessioned 2016-09-05T11:06:20Z
dc.date.available 2016-09-05T11:06:20Z
dc.date.issued 2015-04-01
dc.identifier.issn 0176-1617
dc.identifier.uri http://hdl.handle.net/10251/68722
dc.description.abstract [EN] In woody species, it is known that there is a competition for nutrients, water and carbohydrates between root and fruit-shoot systems, however the influence of root development on fruit quality has received little attention. This research aims to identify the network of mechanisms involved in loquat (Eriobotrya japonica Lindl.) fruit ripening in connection with root activity. The study includes root growth rate measurements paralleling the ongoing fruit developmental stages, photosynthate translocation to the root by using (CO2)-C-13 tracing, and nitrogen fractions (N -> NH4+, N -> NO3-, and N-proteinaceous) as well as their upward translocation to the fruit. The role of hormones (IAA, zeatin and ABA) in regulating the responses is also addressed. The experiment was conducted during two consecutive years on adult and 3-year-old loquat trees from early fruit developmental stage (10% of final size, 701 BBCH scale) to fully developed fruit colour (809 BBCH scale). This approach revealed that root development depends on the growing fruit sink strength, which reduces carbohydrates translocation to the roots and prevents them for further elongation. A nitrate accumulation in roots during the active fruit growth period takes place, which also contributes to slowing elongation and paralleled reduced ammonium and proteinaceous nitrogen concentrations. Concomitantly, the concentration of IAA and zeatin were lowest while that of ABA was highest when root exhibited minimum elongation. The depletion in zeatin and nitrogen supply by the roots paralleling the high ABA transport to the fruit allowed for colour break. These results suggest that loquat fruit changes colour by reducing root growth, as fruit increases sugars and ABA concentrations and reduces nitrogen and zeatin concentrations. (C) 2015 Elsevier GmbH. All rights reserved. Guardar / Salir Siguiente > es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Journal of Plant Physiology es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Colour break es_ES
dc.subject Carbohydrate translocation es_ES
dc.subject Nitrogen es_ES
dc.subject Fruit-root balance es_ES
dc.subject Plant hormones es_ES
dc.subject.classification PRODUCCION VEGETAL es_ES
dc.title Loquat fruit ripening is associated with root depletion. Nutritional and hormonal control es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.jplph.2014.12.016
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Producción Vegetal - Departament de Producció Vegetal es_ES
dc.description.bibliographicCitation Reig Valor, C.; Mesejo Conejos, C.; Martinez Fuentes, A.; Martínez Alcántara, B.; Agustí Fonfría, M. (2015). Loquat fruit ripening is associated with root depletion. Nutritional and hormonal control. Journal of Plant Physiology. 177:51-59. doi:10.1016/j.jplph.2014.12.016 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://dx.doi.org/10.1016/j.jplph.2014.12.016 es_ES
dc.description.upvformatpinicio 51 es_ES
dc.description.upvformatpfin 59 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 177 es_ES
dc.relation.senia 302577 es_ES


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