title: Differential responses of five cherry tomato varieties to water stress: changes on phenolic metabolites and related enzymes.
abstract: Different tomato cultivars (Solanum lycopersicum L.) with differences in tolerance to drought were subjected to moderate water stress to test the effects on flavonoids and caffeoyl derivatives and related enzymes. Our results indicate that water stress resulted in decreased shikimate pathway (DAHP synthase, shikimate dehydrogenase, phenylalanine ammonium lyase, cinnamate 4-hydroxylase, 4-coumarate CoA ligase) and phenolic compounds (caffeoylquinic acid derivatives, quercetin and kaempferol) in the cultivars more sensitive to water stress. However, cv. Zarina is more tolerant, and registered a rise in querc-3-rut-pent, kaempferol-3-api-rut, and kaempferol-3-rut under the treatment of water stress. Moreover, this cultivar show increased activities of flavonoid and phenylpropanoid synthesis and decreased in degradation-related enzymes. These results show that moderate water stress can induce shikimate pathway in tolerant cultivar.
authors.affiliation: Department of Plant Physiology, Faculty of Sciences, University of Granada, Granada, Spain. evasr@ugr.es
authors.forename: Eva
authors.initials: E
authors.lastname: Sánchez-Rodríguez
authors.forename: Diego A
authors.initials: DA
authors.lastname: Moreno
authors.forename: Federico
authors.initials: F
authors.lastname: Ferreres
authors.forename: María del Mar
authors.initials: Mdel M
authors.lastname: Rubio-Wilhelmi
authors.forename: Juan Manuel
authors.initials: JM
authors.lastname: Ruiz
mesh_terms: D000429:Alcohol Oxidoreductases; D003681:Dehydration / Q000235:genetics / Q000378:metabolism; D005419:Flavonoids / Q000235:genetics / Q000378:metabolism*; D018551:Solanum lycopersicum / Q000201:enzymology / Q000235:genetics / Q000378:metabolism*; D010636:Phenols / Q000378:metabolism; D011794:Quercetin / Q000378:metabolism; D012765:Shikimic Acid / Q000378:metabolism
chemical_list: D005419:Flavonoids; D010636:Phenols; D012765:Shikimic Acid; D011794:Quercetin; D000429:Alcohol Oxidoreductases; C022641:Shikimate dehydrogenase