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Water-deficit tolerance in citrus is mediated by the down regulation of PIP gene expresión in roots

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Water-deficit tolerance in citrus is mediated by the down regulation of PIP gene expresión in roots

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dc.contributor.advisor Agustí Fonfría, Manuel es_ES
dc.contributor.advisor Forner Giner, María Ángeles es_ES
dc.contributor.author Rodríguez Gamir, Juan es_ES
dc.date.accessioned 2011-12-28T07:05:42Z
dc.date.available 2011-12-28T07:05:42Z
dc.date.created 2010
dc.date.issued 2011-12-28
dc.identifier.uri http://hdl.handle.net/10251/14155
dc.description.abstract Water deficit (WD) is a growing problem in agriculture. In citrus crops, genetically-determined characteristics of the rootstock are important factors in plant responses to WD. Aquaporins are involved in regulating the water supply to the plant by mediating water flow through the cell membranes. Recent studies support a direct role for aquaporins in plant water relations and demonstrate their involvement in tolerance to WD. This study investigates the relationship between photosynthetic and water-balance parameters with levels of expression of aquaporins in conditions of moderate WD in the rootstocks Poncirus trifoliata (L.) Raf. (PT), Cleopatra Mandarin (Citrus reshni Hort. ex Tan.) (CM) and 030115 (a hybrid of the two former rootstocks). Under conditions of WD, the hybrid 030115 drastically reduced aquaporin expression, accompanied by a loss of plant vigour but without reducing the net CO2 assimilation (ACO2). PT maintained the same level of aquaporin expression under WD as under normal irrigation conditions, but suffered a sharp reduction in ACO2. CM, which has lower expression of aquaporins than PT under both normal irrigation conditions and WD, responded better to water stress conditions than PT. Thus, low levels of aquaporins, or repression of their expression, accompanied by decreased plant vigour resulted in a decrease in plasma membrane permeability, thereby facilitating water retention in the cells under conditions of water stress. This can induce water stress tolerance in citrus rootstocks. es_ES
dc.format.extent 24 es_ES
dc.language Inglés es_ES
dc.publisher Universitat Politècnica de València es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Citrus rootstocks es_ES
dc.subject Aquaporins es_ES
dc.subject Water deficit es_ES
dc.subject.classification PRODUCCION VEGETAL es_ES
dc.subject.other Máster Universitario en Producción Vegetal y Ecosistemas Agroforestales-Màster Universitari en Producció Vegetal i Ecosistemes Agroforestals es_ES
dc.title Water-deficit tolerance in citrus is mediated by the down regulation of PIP gene expresión in roots es_ES
dc.type Tesis de máster es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Servicio de Alumnado - Servei d'Alumnat es_ES
dc.description.bibliographicCitation Rodríguez Gamir, J. (2010). Water-deficit tolerance in citrus is mediated by the down regulation of PIP gene expresión in roots. http://hdl.handle.net/10251/14155 es_ES
dc.description.accrualMethod Archivo delegado es_ES


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