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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
The Plant Journal
Article . 2007 . Peer-reviewed
License: Wiley Online Library User Agreement
Data sources: Crossref
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The role of chromatin‐remodeling factor PKL in balancing osmotic stress responses during Arabidopsis seed germination

Authors: Perruc, Elian; Kinoshita, Natsuko; Lopez Molina, Luis;

The role of chromatin‐remodeling factor PKL in balancing osmotic stress responses during Arabidopsis seed germination

Abstract

SummaryEmbryogenesis in Arabidopsis results in mature, osmotolerant embryos within dry seeds. Late‐embryogenesis programs involve the transcription factors ABI3 and ABI5, which are necessary for osmotolerance. ABI3 and ABI5 are degraded in seeds initiating germination, abolishing their protected state. However, during an early stage of germination, strong osmotic stresses, or ABA exposure maintain ABI3 and ABI5 expression, leading to growth arrest, and osmotolerance. Mild stress stimuli delay ABI3 and ABI5 disappearance, retarding germination but not preventing eventual closure of embryogenesis programs. PICKLE (PKL), a putative chromatin modifier, is necessary to repress ABI3 and ABI5 expression during germination in response to ABA. We show that pkl mutants display persistent high expression of ABI3 and ABI5 upon ABA stimulation. In turn, maintenance of ABI5 expression leads to hypersensitive germination responses to ABA in pkl seeds. We provide evidence that ABI3 and ABI5 are less associated with repressed chromatin in pkl mutants. Our results provide evidence that PKL‐dependent repression of embryonic gene expression extends to late‐embryogenesis genes and is associated with changes in chromatin. We suggest that effective closure of embryogenesis omostolerance programs during germination prevents excessive plant reactions to stress.

Related Organizations
Keywords

Arabidopsis Proteins, Arabidopsis/embryology/genetics/metabolism, Arabidopsis, DNA Helicases, Germination, Chromatin Assembly and Disassembly, Basic-Leucine Zipper Transcription Factors, Gene Expression Regulation, Plant, Osmotic Pressure, Seeds/genetics/growth & development/metabolism, Seeds, Arabidopsis Proteins/genetics/metabolism/physiology, Basic-Leucine Zipper Transcription Factors/genetics/metabolism, Transcription Factors, ddc: ddc:580

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    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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    influence
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    Top 10%
Powered by OpenAIRE graph
citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
118
Top 10%
Top 10%
Top 10%