title: Ectopic expression of a stress-inducible glycosyltransferase from saffron enhances salt and oxidative stress tolerance in Arabidopsis while alters anchor root formation.
abstract: Glycosyltransferases play diverse roles in cellular metabolism by modifying the activities of regulatory metabolites. Three stress-regulated UDP-glucosyltransferase-encoding genes have been isolated from the stigmas of saffron, UGT85U1, UGT85U2 and UGT85V1, which belong to the UGT85 family that includes members associated with stress responses and cell cycle regulation. Arabidopsis constitutively expressing UGT85U1 exhibited and increased anchor root development. No differences were observed in the timing of root emergence, in leaf, stem and flower morphology or flowering time. However, salt and oxidative stress tolerance was enhanced in these plants. Levels of glycosylated compounds were measured in these plants and showed changes in the composition of several indole-derivatives. Moreover, auxin levels in the roots were higher compared to wild type. The expression of several key genes related to root development and auxin homeostasis, including CDKB2.1, CDKB2.2, PIN2, 3 and 4; TIR1, SHR, and CYCD6, were differentially regulated with an increase of expression level of SHR, CYCD6, CDKB2.1 and PIN2. The obtained results showed that UGT85U1 takes part in root growth regulation via auxin signal alteration and the modified expression of cell cycle-related genes, resulting in significantly improved survival during oxidative and salt stress treatments.
authors: Instituto Botánico, Departamento de Ciencia y Tecnología Agroforestal y Genética, Facultad de Farmacia, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain; Fundación Parque Científico y Tecnológico de Albacete, Spain.
authors: Oussama
authors: O
authors: Ahrazem
authors: Instituto Botánico, Departamento de Ciencia y Tecnología Agroforestal y Genética, Facultad de Farmacia, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain.
authors: Angela
authors: A
authors: Rubio-Moraga
authors: Instituto Botánico, Departamento de Ciencia y Tecnología Agroforestal y Genética, Facultad de Farmacia, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain.
authors: Almudena
authors: A
authors: Trapero-Mozos
authors: Universitat Jaume I, Department of Agricultural and Environmental Sciences, 12071 Castelló de la Plana, Spain.
authors: María Fernanda López
authors: MF
authors: Climent
authors: Universitat Jaume I, Department of Agricultural and Environmental Sciences, 12071 Castelló de la Plana, Spain.
authors: Aurelio
authors: A
authors: Gómez-Cadenas
authors: Instituto Botánico, Departamento de Ciencia y Tecnología Agroforestal y Genética, Facultad de Farmacia, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain. Electronic address: Marialourdes.gomez@uclm.es.
authors: Lourdes
authors: L
authors: Gómez-Gómez
mesh_terms: D017360:Arabidopsis / Q000201:enzymology / Q000235:genetics / Q000502:physiology*; D027622:Crocus / Q000201:enzymology* / Q000235:genetics; D000066630:Ectopic Gene Expression; D035264:Flowers / Q000201:enzymology / Q000235:genetics / Q000502:physiology; D018506:Gene Expression Regulation, Plant; D016695:Glycosyltransferases / Q000235:genetics* / Q000378:metabolism; D007210:Indoleacetic Acids / Q000378:metabolism*; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D010641:Phenotype; D010937:Plant Growth Regulators / Q000378:metabolism*; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D018517:Plant Roots / Q000201:enzymology / Q000235:genetics / Q000502:physiology; D030821:Plants, Genetically Modified; D055049:Salt Tolerance; D013312:Stress, Physiological
chemical_list: D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D010940:Plant Proteins; D016695:Glycosyltransferases
keywords: Abiotic stress; Anchor root development; Auxin; Glucosyltransferases; Saffron; Stigmas