Show simple item record

dc.contributor.authorBrumós, Javier
dc.contributor.authorColmenero Flores, José M.
dc.contributor.authorConesa, Ana
dc.contributor.authorIzquierdo, Pedro
dc.contributor.authorSánchez, Guadalupe
dc.contributor.authorIglesias, Domingo J.
dc.contributor.authorLópez Climent, María Fernanda
dc.contributor.authorGómez Cadenas, Aurelio
dc.contributor.authorTalón, Manuel
dc.description.abstractSalinity tolerance in Citrus is strongly related to leaf chloride accumulation. Both chloride homeostasis and specific genetic responses to Cl− toxicity are issues scarcely investigated in plants. To discriminate the transcriptomic network related to Cl− toxicity and salinity tolerance, we have used two Cl− salt treatments (NaCl and KCl) to perform a comparative microarray approach on two Citrus genotypes, the salt-sensitive Carrizo citrange, a poor Cl− excluder, and the tolerant Cleopatra mandarin, an efficient Cl− excluder. The data indicated that Cl− toxicity, rather than Na+ toxicity and/or the concomitant osmotic perturbation, is the primary factor involved in the molecular responses of citrus plant leaves to salinity. A number of uncharacterized membrane transporter genes, like NRT1-2, were differentially regulated in the tolerant and the sensitive genotypes, suggesting its potential implication in Cl− homeostasis. Analyses of enriched functional categories showed that the tolerant rootstock induced wider stress responses in gene expression while repressing central metabolic processes such as photosynthesis and carbon utilization. These features were in agreement with phenotypic changes in the patterns of photosynthesis, transpiration, and stomatal conductance and support the concept that regulation of transpiration and its associated metabolic adjustments configure an adaptive response to salinity that reduces Cl− accumulation in the tolerant genotype.ca_CA
dc.format.extent16 p.ca_CA
dc.relation.isPartOfFunctional & Integrative Genomics, 9, 3, p. 293-309ca_CA
dc.rightsCopyright Springer-Verlag 2009ca_CA
dc.subjectChloride transportca_CA
dc.subjectSalt stressca_CA
dc.subjectCitrus rootstockca_CA
dc.subjectCarbon metabolismca_CA
dc.titleMembrane transporters and carbon metabolism implicated in chloride homeostasis differentiate salt stress responses in tolerant and sensitive Citrus rootstocksca_CA

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record