Document Detail

Characterization of XET-related genes of rice.
MedLine Citation:
PMID:  10712549     Owner:  NLM     Status:  MEDLINE    
To elucidate the mechanism of internodal elongation in rice (Oryza sativa L.), we analyzed genes encoding xyloglucan endotransglycosylase (XET), a cell wall-loosening enzyme essential for cell elongation. Four rice XET-related (XTR) genes, OsXTR1, OsXTR2, OsXTR3, and OsXTR4, were isolated and their expression patterns in rice plants determined. The expression of the four XTR genes showed different patterns of organ specificity and responses to several plant hormones. OsXTR1 and OsXTR3 were up-regulated by gibberellin and brassinosteroids, whereas OsXTR2 and OsXTR4 showed no clear response to these hormones. Expression of the four XTR genes was also investigated in elongating internodes at different developmental stages. OsXTR1 and OsXTR3 were preferentially expressed in the elongating zone of internodes, while OsXTR2 and OsXTR4 were expressed in nodes and in the divisional and elongating zones of internodes. In three genetic mutants with abnormal heights, the expression of OsXTR1 and OsXTR3 correlated with the height of the mutants, whereas no such correlation was observed for OsXTR2 and OsXTR4. Based on these observations, we discuss the roles that OsXTR1 and OsXTR3 may play in internodal elongation in rice.
S Uozu; M Tanaka-Ueguchi; H Kitano; K Hattori; M Matsuoka
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant physiology     Volume:  122     ISSN:  0032-0889     ISO Abbreviation:  Plant Physiol.     Publication Date:  2000 Mar 
Date Detail:
Created Date:  2000-05-25     Completed Date:  2000-05-25     Revised Date:  2013-06-11    
Medline Journal Info:
Nlm Unique ID:  0401224     Medline TA:  Plant Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  853-9     Citation Subset:  IM    
Graduate School of Bioagricultural Science and BioScience Center, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
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MeSH Terms
Amino Acid Sequence
Cloning, Molecular
Gene Expression Regulation, Developmental / drug effects
Gene Expression Regulation, Plant / drug effects
Genes, Plant*
Glycosyltransferases / genetics*
Molecular Sequence Data
Oryza sativa / enzymology,  genetics*,  growth & development
Plant Growth Regulators / pharmacology
Sequence Homology, Amino Acid
Reg. No./Substance:
0/Plant Growth Regulators; EC 2.4.-/Glycosyltransferases; EC 2.4.1.-/xyloglucan endotransglycosylase

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