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Science 19 July 2002: Vol. 297. no. 5580, pp. 405 - 409 DOI: 10.1126/science.1073633
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Reports
A Role for Peroxisomes in Photomorphogenesis and Development of Arabidopsis
Jianping Hu,12
Maria Aguirre,12
Charles Peto,3
José Alonso,1
Joseph Ecker,1
Joanne Chory12*
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 in
det1 are rescued by ted3. ted3 also partially suppresses another pleiotropic de-etiolated mutant
cop1. Thus, peroxisomes, whose functions are still largely
unexplored, play a key role in a photomorphogenetic pathway
negatively regulated by the DET1 and COP proteins.
1 Plant Biology Laboratory,
2 Howard Hughes Medical Institute,
3 Laboratory of Neuronal Structure and Function, The
Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
*
To whom correspondence should be addressed. E-mail:
chory{at}salk.edu
Read the Full Text
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