Photoreceptors CRYTOCHROME2 and Phytochrome B Control Chromatin Compaction in Arabidopsis

Development and acclimation processes to the environment are associated with large-scale changes in chromatin compaction in Arabidopsis (Arabidopsis thaliana). Here, we studied the effects of light signals on chromatin organization. A decrease in light intensity induces a large-scale reduction in ch...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 2010-12, Vol.154 (4), p.1686-1696
Main Authors: van Zanten, Martijn, Tessadori, Federico, McLoughlin, Fionn, Smith, Reuben, Millenaar, Frank F, van Driel, Roel, Voesenek, Laurentius A.C.J, Peeters, Anton J.M, Fransz, Paul
Format: Article
Language:English
Subjects:
Arabidopsis - metabolism
Arabidopsis thaliana
Biological and medical sciences
Chromatin
Chromatin - metabolism
Chromocenters
Cryptochromes - physiology
ENVIRONMENTAL STRESS AND ADAPTATION TO STRESS
Fundamental and applied biological sciences. Psychology
Genetic variation
Luminous intensity
Molecular Sequence Data
Optical filters
Photoperiod
Photoreceptors
Photoreceptors, Plant - physiology
Phytochrome B - physiology
Plant cells
Plant physiology and development
Plants
Visible spectrum
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Summary:Development and acclimation processes to the environment are associated with large-scale changes in chromatin compaction in Arabidopsis (Arabidopsis thaliana). Here, we studied the effects of light signals on chromatin organization. A decrease in light intensity induces a large-scale reduction in chromatin compaction. This low light response is reversible and shows strong natural genetic variation. Moreover, the degree of chromatin compaction is affected by light quality signals relevant for natural canopy shade. The photoreceptor CRYPTOCHROME2 appears a general positive regulator of low light-induced chromatin decompaction. Phytochrome B also controls light-induced chromatin organization, but its effect appears to be dependent on the genetic background. We present a model in which chromatin compaction is regulated by the light environment via CRYPTOCHROME2 protein abundance, which is controlled by phytochrome B action.
ISSN:0032-0889
1532-2548
1532-2548
DOI:10.1104/pp.110.164616