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Influence of crop load on the expression patterns of starch metabolism genes in alternate-bearing Citrus trees

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Influence of crop load on the expression patterns of starch metabolism genes in alternate-bearing Citrus trees

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dc.contributor.author González Nebauer, Sergio es_ES
dc.contributor.author Renau Morata, Begoña es_ES
dc.contributor.author Lluch Gomez, Yolanda Patricia es_ES
dc.contributor.author BAROJA FERNANDEZ, EDURNE es_ES
dc.contributor.author POZUETA-ROMERO, JAVIER es_ES
dc.contributor.author Molina Romero, Rosa Victoria es_ES
dc.date.accessioned 2016-11-08T12:50:57Z
dc.date.available 2016-11-08T12:50:57Z
dc.date.issued 2014-07
dc.identifier.issn 0981-9428
dc.identifier.uri http://hdl.handle.net/10251/73482
dc.description.abstract [EN] The fruit is the main sink organ in Citrus and captures almost all available photoassimilates during its development. Consequently, carbohydrate partitioning and starch content depend on the crop load of Citrus trees. Nevertheless, little is known about the mechanisms controlling the starch metabolism at the tree level in relation to presence of fruit. The aim of this study was to find the relation between the seasonal variation of expression and activity of the genes involved in carbon metabolism and the partition and allocation of carbohydrates in 'Salustiana' sweet orange trees with different crop loads. Metabolisable carbohydrates, and the expression and activity of the enzymes involved in sucrose and starch metabolism, including sucrose transport, were determined during the year in the roots and leaves of 40-year-old trees bearing heavy crop loads ('on' trees) and trees with almost no fruits ('off' trees). Fruit altered photoassimilate partitioning in trees. Sucrose content tended to be constant in roots and leaves, and surplus fixed carbon is channeled to starch production. Differences between 'on' and 'off' trees in starch content can be explained by differences in ADP-glucose pyrophosphorylase (AGPP) expression/activity and alpha-amylase activity which varies depending on crop load. The observed relation of AGPP and UGPP (UDP-glucose pyrophosphorylase) is noteworthy and indicates a direct link between sucrose and starch synthesis. Furthermore, different roles for sucrose transporter SUT1 and SUT2 have been proposed. Variation in soluble sugars content cannot explain the differences in gene expression between the 'on' and 'off' trees. A still unknown signal from fruit should be responsible for this control. es_ES
dc.description.sponsorship The authors thank Dr. E. Primo-Millo for critically reviewing the manuscript. We also thank the staff of the ANECOOP experimental station in Museros (Valencia, Spain) for their support and assistance in the field management of the citrus orchard, and Helen Warburton for revising the language in the manuscript. This work has been partially supported by the Conselleria de Cultura, Educacio i Esport de la Generalitat Valenciana [GV/2007/213 and GV/2009/034], Comision Interministerial de Ciencia y Tecnologia [BIO2010/18239] and Fondo Europeo de Desarrollo Regional [IIM01491.RI1]. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation info:eu-repo/grantAgreement/Generalitat Valenciana//GV%2F2009%2F034/ES/Fotosíntesis en citrus/ es_ES
dc.relation Comision Interministerial de Ciencia y Tecnologia BIO2010/18239 es_ES
dc.relation Fondo Europeo de Desarrollo Regional IIM01491.RI1 es_ES
dc.relation.ispartof Plant Physiology and Biochemistry es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Alternate bearer es_ES
dc.subject Citrus es_ES
dc.subject Gene expression es_ES
dc.subject Enzyme activities es_ES
dc.subject Sinks es_ES
dc.subject Partition es_ES
dc.subject Fruit load es_ES
dc.subject.classification BIOLOGIA VEGETAL es_ES
dc.subject.classification FISIOLOGIA VEGETAL es_ES
dc.title Influence of crop load on the expression patterns of starch metabolism genes in alternate-bearing Citrus trees es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.plaphy.2014.03.032
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Biología Vegetal - Departament de Biologia Vegetal es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Producción Vegetal - Departament de Producció Vegetal es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural - Escola Tècnica Superior d'Enginyeria Agronòmica i del Medi Natural es_ES
dc.description.bibliographicCitation González Nebauer, S.; Renau Morata, B.; Lluch Gomez, YP.; Baroja Fernandez, E.; Pozueta-Romero, J.; Molina Romero, RV. (2014). Influence of crop load on the expression patterns of starch metabolism genes in alternate-bearing Citrus trees. Plant Physiology and Biochemistry. 80:105-113. https://doi.org/10.1016/j.plaphy.2014.03.032 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://dx.doi.org/10.1016/j.plaphy.2014.03.032 es_ES
dc.description.upvformatpinicio 105 es_ES
dc.description.upvformatpfin 113 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 80 es_ES
dc.relation.senia 276857 es_ES
dc.contributor.funder Generalitat Valenciana es_ES


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