Document Detail

The over-expression of an Arabidopsis B3 transcription factor, ABS2/NGAL1, leads to the loss of flower petals.
MedLine Citation:
PMID:  23185464     Owner:  NLM     Status:  MEDLINE    
Transcriptional regulations are involved in many aspects of plant development and are mainly achieved through the actions of transcription factors (TF). To investigate the mechanisms of plant development, we carried out genetic screens for mutants with abnormal shoot development. Taking an activation tagging approach, we isolated a gain-of-function mutant abs2-1D (abnormal shoot 2-1D). abs2-1D showed pleiotropic growth defects at both the vegetative and reproductive developmental stages. We cloned ABS2 and it encodes a RAV sub-family of plant B3 type of transcriptional factors. Phylogenetic analysis showed that ABS2 was closely related to NGATHA (NGA) genes that are involved in flower development and was previously named NGATHA-Like 1 (NGAL1). NGAL1 was expressed mainly in the root and the filament of the stamen in flower tissues and sub-cellular localization assay revealed that NGAL1 accumulated in the nucleus. Interestingly, over-expression of NGAL1 driven by the constitutive 35S promoter led to transgenic plants with conspicuous flower defects, particularly a loss-of-petal phenotype. A loss-of-function ngal1-1 mutant did not show obvious phenotype, suggesting the existence of redundant activities and also the utility of gain-of-function genetic screens. Our results show that the over-expression of NGAL1 is capable of altering flower petal development, as well as shoot development.
Jingxia Shao; Xiayan Liu; Rui Wang; Gaisheng Zhang; Fei Yu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-11-21
Journal Detail:
Title:  PloS one     Volume:  7     ISSN:  1932-6203     ISO Abbreviation:  PLoS ONE     Publication Date:  2012  
Date Detail:
Created Date:  2012-11-27     Completed Date:  2013-05-30     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  101285081     Medline TA:  PLoS One     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e49861     Citation Subset:  IM    
College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, People's Republic of China.
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MeSH Terms
Arabidopsis* / genetics,  growth & development,  metabolism
Arabidopsis Proteins / genetics,  metabolism*
Flowers* / genetics,  growth & development,  metabolism
Gene Expression Regulation, Developmental
Gene Expression Regulation, Plant
Plant Roots* / growth & development,  metabolism
Plant Shoots / genetics,  growth & development*
Plants, Genetically Modified
Transcription Factors / genetics,  metabolism*
Reg. No./Substance:
0/ABS2 protein, Arabidopsis; 0/Arabidopsis Proteins; 0/NGA1 protein, Arabidopsis thaliana; 0/Transcription Factors

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