Document Detail

Involvement of PpDof1 transcriptional repressor in the nutrient condition-dependent growth control of protonemal filaments in Physcomitrella patens.
MedLine Citation:
PMID:  22345635     Owner:  NLM     Status:  MEDLINE    
In higher plants, the Dof transcription factors that harbour a conserved plant-specific DNA-binding domain function in the regulation of diverse biological processes that are unique to plants. Although these factors are present in both higher and lower plants, they have not yet been characterized in lower plants. Here six genes encoding Dof transcription factors in the moss Physcomitrella patens are characterized and two of these genes, PpDof1 and PpDof2, are functionally analysed. The targeted disruption of PpDof1 caused delayed or reduced gametophore formation, accompanied by an effect on development of the caulonema from the chloronema. Furthermore, the ppdof1 disruptants were found to form smaller colonies with a reduced frequency of branching of protonemal filaments, depending on the nutrients in the media. Most of these phenotypes were not apparent in the ppdof2 disruptant, although the ppdof2 disruptants also formed smaller colonies on a particular medium. Transcriptional repressor activity of PpDof1 and PpDof2 and modified expression of a number of genes in the ppdof disruptant lines were also shown. These results thus suggest that the PpDof1 transcriptional repressor has a role in controlling nutrient-dependent filament growth.
Takumi Sugiyama; Tetsuya Ishida; Nobumitsu Tabei; Mikao Shigyo; Mineko Konishi; Tadakatsu Yoneyama; Shuichi Yanagisawa
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-02-15
Journal Detail:
Title:  Journal of experimental botany     Volume:  63     ISSN:  1460-2431     ISO Abbreviation:  J. Exp. Bot.     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-05-15     Completed Date:  2012-09-07     Revised Date:  2013-06-26    
Medline Journal Info:
Nlm Unique ID:  9882906     Medline TA:  J Exp Bot     Country:  England    
Other Details:
Languages:  eng     Pagination:  3185-97     Citation Subset:  IM    
Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan.
Data Bank Information
Bank Name/Acc. No.:
GENBANK/AB626697;  AB626698;  AB626699;  AB626700;  AB626701
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MeSH Terms
Amino Acid Sequence
Bryopsida / cytology*,  drug effects,  genetics,  growth & development*
Culture Media / pharmacology*
Gene Expression Regulation, Plant / drug effects
Genes, Plant / genetics
Germ Cells, Plant / cytology,  drug effects,  metabolism
Molecular Sequence Data
Mutation / genetics
Plant Proteins / chemistry,  genetics,  metabolism*
Repressor Proteins / chemistry,  genetics,  metabolism*
Transcription, Genetic* / drug effects
Reg. No./Substance:
0/Culture Media; 0/Plant Proteins; 0/Repressor Proteins

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