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A Mutation in Plant-Specific SWI2/SNF2-Like Chromatin-Remodeling Proteins, DRD1 and DDM1, Delays Leaf Senescence in Arabidopsis thaliana

Title
A Mutation in Plant-Specific SWI2/SNF2-Like Chromatin-Remodeling Proteins, DRD1 and DDM1, Delays Leaf Senescence in Arabidopsis thaliana
Authors
Cho, EJ[Cho, Eun Ju]Choi, SH[Choi, Seung Hee]Kim, JH[Kim, Ji Hong]Kim, JE[Kim, Ji Eun]Lee, MH[Lee, Min Hee]Chung, BY[Chung, Byung Yeoup]Woo, HR[Woo, Hye Ryun]Kim, JH[Kim, Jin-Hong]
DGIST Authors
Woo, HR[Woo, Hye Ryun]
Issue Date
2016-01-11
Citation
PLoS ONE, 11(1)
Type
Article
Article Type
Article
Keywords
Arabidopsis ThalianaCentromeric RepeatChlorophyll ContentDDM1 GeneDRD1 GeneEpigeneticsGene ExpressionGene MutationGene RepressionGenetic AssociationGenetic ParametersLeaf SenescenceNon-HumanPhotosynthesisPlant GeneProtein ContentProtein FunctionTranscriptionally Silent Information RepeatWild Type
ISSN
1932-6203
Abstract
Leaf senescence is a finely regulated complex process; however, evidence for the involvement of epigenetic processes in the regulation of leaf senescence is still fragmentary. Therefore, we chose to examine the functions of DRD1, a SWI2/SNF2 chromatin remodeling protein, in epigenetic regulation of leaf senescence, particularly because drd1-6 mutants exhibited a delayed leaf senescence phenotype. Photosynthetic parameters such as Fv/Fm and ETRmax were decreased in WT leaves compared to leaves of drd1-6 mutants after dark treatment. The WT leaves remarkably lost more chlorophyll and protein content during dark-induced senescence (DIS) than the drd1-6 leaves did. The induction of senescenceassociated genes was noticeably inhibited in the drd1-6 mutant after 5-d of DIS. We compared changes in epigenetic regulation during DIS via quantitative expression analysis of 180-bp centromeric (CEN) and transcriptionally silent information (TSI) repeats. Their expression levels significantly increased in both the WT and the drd1-6 mutant, but did much less in the latter. Moreover, the delayed leaf senescence was observed in ddm1-2 mutants as well as the drd1-6, but not in drd1-p mutants. These data suggest that SWI2/ SNF2 chromatin remodeling proteins such as DRD1 and DDM1 may influence leaf senescence possibly via epigenetic regulation. © 2016 Cho et al.This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
URI
http://hdl.handle.net/20.500.11750/2555
DOI
10.1371/journal.pone.0146826
Publisher
Public Library of Science
Related Researcher
Files:
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Collection:
New BiologyETC1. Journal Articles


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