DET1, a negative regulator of light-mediated development and gene expression in arabidopsis,encodes a novel nuclear-localized protein |
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| Institution: | 1. Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Department of Horticulture, Zhejiang University, Hangzhou 310058, China;2. College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China;3. School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 221116, China;1. Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas, CSIC, 28040 Madrid, Spain;2. Departamento de Genética Molecular de Plantas, Centro Nacional de Biotecnología, CSIC, 28049 Madrid, Spain;1. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 73000, People''s Republic of China;2. Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, People''s Republic of China;1. Botanical Institute and Cluster of Excellence on Plant Sciences (CEPLAS), Biocenter, University of Cologne, Zülpicher Strasse 47b, 50674 Cologne, Germany;2. Max Planck Institute for Plant Breeding Research, Carl-von-Linné Weg 10, 50829 Cologne, Germany;3. Institute of Plant Biology, Biological Research Center of Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary;1. Key Laboratory of Urban Agriculture (South) Ministry of Agriculture and School of Agricultural and Biological Sciences, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, China;2. School of Life Sciences and Biotechnology, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, China;3. School of Life Science, Henan University, Jinming Avenue, Kaifeng 475001, China |
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| Abstract: | The mechanisms by which plants integrate light signals to modify endogenous developmental programs are largely unknown. One candidate for a signal transduction component that may integrate light with developmental pathways is the Arabidopsis DET1 gene product. Here we report the positional cloning of the DET1 locus and show that DET1 is a unique nuclear-localized protein. An analysis of a number of det1 mutants indicates that mutants with partial DET1 activity develop as light-grown plants in the dark. det1 null mutants share this phenotype, but also display severe defects in temporal and spatial regulation of gene expression. These results suggest that DET1 acts in the nucleus to control the cell type-specific expression of light-regulated promoters. |
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