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Title: Transcription factor OsHsfC1b regulates salt tolerance and development in Oryza sativa ssp . japonica .
Author: Schmidt R Schippers JH Welker A Mieulet D Guiderdoni E Mueller-Roeber B
Journal: AoB Plants Citation: V : 2012 P : pls011 Year: 2012 Type: In-Data-Review
Literature: oryza Field: abstract Doc ID: pub22616023 Accession (PMID): 22616023
Abstract: BACKGROUND AND AIMS : Salt stress leads to attenuated growth and productivity in rice . Transcription factors like heat shock factors ( HSFs ) represent central regulators of stress adaptation . Heat shock factors of the classes A and B are well established as regulators of thermal and non-thermal stress responses in plants ; however , the role of class C HSFs is unknown . Here we characterized the function of the OsHsfC1b ( Os01g53220 ) transcription factor from rice . METHODOLOGY : We analysed the expression of OsHsfC1b in the rice japonica cultivars Dongjin and Nipponbare exposed to salt stress as well as after mannitol , abscisic acid ( ABA ) and H ( 2 ) O ( 2 ) treatment . For functional characterization of OsHsfC1b , we analysed the physiological response of a T-DNA insertion line ( hsfc1b ) and two artificial micro-RNA ( amiRNA ) knock-down lines to salt , mannitol and ABA treatment . In addition , we quantified the expression of small Heat Shock Protein ( sHSP ) genes and those related to signalling and ion homeostasis by quantitative real-time polymerase chain reaction in roots exposed to salt . The subcellular localization of OsHsfC1b protein fused to green fluorescent protein ( GFP ) was determined in Arabidopsis mesophyll cell protoplasts . PRINCIPAL RESULTS : Expression of OsHsfC1b was induced by salt , mannitol and ABA , but not by H ( 2 ) O ( 2 ) . Impaired function of OsHsfC1b in the hsfc1b mutant and the amiRNA lines led to decreased salt and osmotic stress tolerance , increased sensitivity to ABA , and temporal misregulation of salt-responsive genes involved in signalling and ion homeostasis . Furthermore , sHSP genes showed enhanced expression in knock-down plants under salt stress . We observed retarded growth of hsfc1b and knock-down lines in comparison with control plants under non-stress conditions . Transient expression of OsHsfC1b fused to GFP in protoplasts revealed nuclear localization of the transcription factor . CONCLUSIONS : OsHsfC1b plays a role in ABA-mediated salt stress tolerance in rice . Furthermore , OsHsfC1b is involved in the response to osmotic stress and is required for plant growth under non-stress conditions .
Matching Sentences:
[ Sen. 6, subscore: 1.00 ]: For functional characterization of OsHsfC1b , we analysed the physiological response of a T-DNA insertion line ( hsfc1b ) and two artificial micro-RNA ( amiRNA ) knock-down lines to salt , mannitol and ABA treatment .
[ Sen. 10, subscore: 1.00 ]: Impaired function of OsHsfC1b in the hsfc1b mutant and the amiRNA lines led to decreased salt and osmotic stress tolerance , increased sensitivity to ABA , and temporal misregulation of salt-responsive genes involved in signalling and ion homeostasis .
[ Sen. 12, subscore: 1.00 ]: We observed retarded growth of hsfc1b and knock-down lines in comparison with control plants under non-stress conditions .
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