title: An RNA chaperone, AtCSP2, negatively regulates salt stress tolerance.
abstract: Cold shock domain (CSD) proteins are RNA chaperones that destabilize RNA secondary structures. Arabidopsis Cold Shock Domain Protein 2 (AtCSP2), one of the 4 CSD proteins (AtCSP1-AtCSP4) in Arabidopsis, is induced during cold acclimation but negatively regulates freezing tolerance. Here, we analyzed the function of AtCSP2 in salt stress tolerance. A double mutant, with reduced AtCSP2 and no AtCSP4 expression (atcsp2-3 atcsp4-1), displayed higher survival rates after salt stress. In addition, overexpression of AtCSP2 resulted in reduced salt stress tolerance. These data demonstrate that AtCSP2 acts as a negative regulator of salt stress tolerance in Arabidopsis.
authors.affiliation: a Hokkaido Agricultural Research Center (HARC); National Agriculture and Food Research Organization (NARO) ; Toyohira-ku, Sapporo , Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Sasaki
authors.forename: Yuelin
authors.initials: Y
authors.lastname: Liu
authors.forename: Myung-Hee
authors.initials: MH
authors.lastname: Kim
authors.forename: Ryozo
authors.initials: R
authors.lastname: Imai
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000378:metabolism; D057773:Cold Shock Proteins and Peptides / Q000235:genetics* / Q000378:metabolism; D003080:Cold Temperature; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D018832:Molecular Chaperones / Q000378:metabolism; D018749:RNA, Plant / Q000378:metabolism*; D016601:RNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D055049:Salt Tolerance / Q000235:genetics*; D012965:Sodium Chloride / Q000378:metabolism*
chemical_list: D029681:Arabidopsis Proteins; D057773:Cold Shock Proteins and Peptides; C521041:GRP2 protein, Arabidopsis; D018832:Molecular Chaperones; D018749:RNA, Plant; D016601:RNA-Binding Proteins; D012965:Sodium Chloride
keywords: Arabidopsis; RNA chaperone; cold shock domain; freezing tolerance; salt stress tolerance