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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yu, Hao Kumar, Prakash P. Xu, Yifeng Tan, Ee Ling |
| Description | Author Affiliation: Yu H ( Department of Biological Sciences, Faculty of Science, National University of Singapore Asia, 10 Science Drive 4, Singapore Asia 117543.); |
| Abstract | The most dramatic phase change in plants is the transition from vegetative to reproductive growth. This flowering process is regulated by several interacting pathways that monitor both the developmental state of the plants and environmental cues such as light and temperature. The flowering-time genes FLOWERING LOCUS T (FT) and SUPPRESSOR OF OVEREXPRESSION OF CO1 (SOC1), together with the floral meristem identity gene LEAFY (LFY), are three essential regulators integrating floral signals from multiple pathways in Arabidopsis thaliana. Part of the crosstalk among these genes is mediated by a putative transcription factor, AGAMOUS-LIKE 24 (AGL24). This gene is gradually activated in shoot apical meristems during the floral transition and later located in the whole zone of both inflorescence and floral meristems. Loss and reduction of AGL24 activity by double-stranded RNA-mediated interference result in late flowering, whereas constitutive overexpression of AGL24 causes precocious flowering. The correlation between the level of AGL24 accumulation and the alteration of flowering time suggests that AGL24 is a dosage-dependent flowering promoter. Analysis of AGL24 expression in various flowering-time mutants shows that it is regulated in several floral inductive pathways. Further genetic analyses of epistasis indicate that AGL24 may act downstream of SOC1 and upstream of LFY. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 25 |
| Volume Number | 99 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2002-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Arabidopsis Proteins Physiology Arabidopsis Genetics Growth & Development Gene Expression Regulation, Plant Transcription Factors DNA-Binding Proteins Gene Dosage MADS Domain Proteins Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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