Document Detail

Abiotic stress responsive rice ASR1 and ASR3 exhibit different tissue-dependent sugar and hormone-sensitivities.
MedLine Citation:
PMID:  23620302     Owner:  NLM     Status:  MEDLINE    
The expression of the six rice ASR genes is differentially regulated in a tissue-dependent manner according to environmental conditions and reproductive stages. OsASR1 and OsASR3 are the most abundant and are found in most tissues; they are enriched in the leaves and roots, respectively. Coexpression analysis of OsASR1 and OsASR3 and a comparison of the cis-acting elements upstream of OsASR1 and OsASR3 suggested that their expression is regulated in common by abiotic stresses but differently regulated by hormone and sugar signals. The results of quantitative real-time PCR analyses of OsASR1 and OsASR3 expression under various conditions further support this model. The expression of both OsASR1 and OsASR3 was induced by drought stress, which is a major regulator of the expression of all ASR genes in rice. In contrast, ABA is not a common regulator of the expression of these genes. OsASR1 transcription was highly induced by ABA, whereas OsASR3 transcription was strongly induced by GA. In addition, OsASR1 and OsASR3 expression was significantly induced by sucrose and sucrose/glucose treatments, respectively. The induction of gene expression in response to these specific hormone and sugar signals was primarily observed in the major target tissues of these genes (i.e., OsASR1 in leaves and OsASR3 in roots). Our data also showed that the overexpression of either OsASR1 or OsASR3 in transgenic rice plants increased their tolerance to drought and cold stress. Taken together, our results revealed that the transcriptional control of different rice ASR genes exhibit different tissue-dependent sugar and hormone-sensitivities.
Joungsu Joo; Youn Hab Lee; Yeon-Ki Kim; Baek Hie Nahm; Sang Ik Song
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2013-04-24
Journal Detail:
Title:  Molecules and cells     Volume:  35     ISSN:  0219-1032     ISO Abbreviation:  Mol. Cells     Publication Date:  2013 May 
Date Detail:
Created Date:  2013-05-27     Completed Date:  2014-01-28     Revised Date:  2014-06-03    
Medline Journal Info:
Nlm Unique ID:  9610936     Medline TA:  Mol Cells     Country:  Korea (South)    
Other Details:
Languages:  eng     Pagination:  421-35     Citation Subset:  IM    
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MeSH Terms
Cold Temperature
Gene Expression Regulation, Plant
Oryza sativa / genetics,  metabolism*
Plant Leaves / metabolism
Plant Proteins / genetics,  metabolism
Plant Roots / metabolism
Plants, Genetically Modified
Stress, Physiological*
Reg. No./Substance:
0/Plant Proteins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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