A Role for Peroxisomes in Photomorphogenesis and Development of Arabidopsis

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Science  19 Jul 2002:
Vol. 297, Issue 5580, pp. 405-409
DOI: 10.1126/science.1073633

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The nuclear protein DET1 is a central repressor of photomorphogenesis in plants. We have identified the molecular lesion in ted3, a mutation that dominantly suppresses the phenotypes of det1-1. TED3 encodes a peroxisomal protein (AtPex2p) essential for Arabidopsis growth. Developmental defects and the abnormal expression of many genes indet1 are rescued by ted3. ted3 also partially suppresses another pleiotropic de-etiolated mutantcop1. Thus, peroxisomes, whose functions are still largely unexplored, play a key role in a photomorphogenetic pathway negatively regulated by the DET1 and COP proteins.

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