title: Induction of a polyubiquitin gene promoter by dehydration stresses in transformed rice cells.
abstract: The expression of the maize polyubiquitin gene promoter UBI1 in rice cells has been used to study the involvement of ubiquitin in cell protection responses to dehydration caused by osmotic, saline or freezing stress. The effect of these stresses on UBI1 activity was investigated by the use of stably transformed rice calli (UBI1:GUS), as well as by transient expression experiments performed with cell lines with high or low tolerance to each type of stress. The theoretical analysis of the UBI1 promoter shows several putative stress-regulated boxes that could account for the stress-related UBI1 induction pattern described in this work. We suggest that the study of the differential UBI1 promoter-driven expression in rice cell lines with different level of tolerance to stress might be useful to elucidate complex signal transduction pathways in response to dehydration stresses in monocots.
authors.affiliation: Departmento de Biología Vegetal, Facultad de Biología, Avda. Dr Moliner 50, 46100 Burjasot, Valencia, Spain.
authors.forename: Lorena
authors.initials: L
authors.lastname: Perales
authors.forename: Lola
authors.initials: L
authors.lastname: Peñarrubia
authors.forename: María-Jesús
authors.initials: MJ
authors.lastname: Cornejo
mesh_terms: D002478:Cells, Cultured; D018506:Gene Expression Regulation, Plant; D005966:Glucuronidase / Q000235:genetics; D012275:Oryza / Q000166:cytology / Q000235:genetics*; D030821:Plants, Genetically Modified; D010957:Plasmids; D025821:Polyubiquitin / Q000235:genetics*; D011401:Promoter Regions, Genetic; D014170:Transformation, Genetic; D014867:Water
chemical_list: D014867:Water; D025821:Polyubiquitin; D005966:Glucuronidase