A Mutation in Plant-Specific SWI2/SNF2-Like Chromatin-Remodeling Proteins, DRD1 and DDM1, Delays Leaf Senescence in Arabidopsis thaliana
Copyright policy )A Mutation in Plant-Specific SWI2/SNF2-Like Chromatin-Remodeling Proteins, DRD1 and DDM1, Delays Leaf Senescence in Arabidopsis thaliana
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 senescence-associated 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.
- National Research Foundation of Korea Korea (Republic of)
- Korea Atomic Energy Research Institute Korea (Republic of)
- UNIVERSITY SCIENCE AND TECHNOLOGY China (People's Republic of)
- University of Science and Technology Yemen
- University of Science and Technology (KNUST) Ghana
Chlorophyll, Gene Mutation, PHOTOSYSTem-II, Transcription Factor, Arabidopsis, Gene Expression, Gene, Epigenesis, Genetic, Gene Expression Regulation, Plant, Plant Gene, Cluster Analysis, DDM1 Gene, Photosynthesis, Oligonucleotide Array Sequence Analysis, DIRECTED DNA METHYLATION, Chlorophyll Content, Q, R, DNA-Directed RNA Polymerases, Chromatin, DNA-Binding Proteins, Phenotype, Medicine, Epigenetics, Genetic Parameters, Genetic Association, Research Article, 570, Arabidopsis Thaliana, Science, HISTONE METHYLATION, Centromere, Drd1 Gene, Protein Function, Genes, Plant, Article, PROGRAMMED CELL-DEATH, Transcriptionally Silent Information Repeat, LEAVES, Protein Content, LEAF SENESCENCE, WILD-TYPE, CHLOROPHYLL DEGRADATION, 580, ENDOGENOUS TARGETS, Gene Repression, IDENTIFICATION, Arabidopsis Proteins, Gene Expression Profiling, Nonhuman, Plant Leaves, Mutation, RNA, Centromeric Repeat, Genome-Wide Association Study, Transcription Factors
Chlorophyll, Gene Mutation, PHOTOSYSTem-II, Transcription Factor, Arabidopsis, Gene Expression, Gene, Epigenesis, Genetic, Gene Expression Regulation, Plant, Plant Gene, Cluster Analysis, DDM1 Gene, Photosynthesis, Oligonucleotide Array Sequence Analysis, DIRECTED DNA METHYLATION, Chlorophyll Content, Q, R, DNA-Directed RNA Polymerases, Chromatin, DNA-Binding Proteins, Phenotype, Medicine, Epigenetics, Genetic Parameters, Genetic Association, Research Article, 570, Arabidopsis Thaliana, Science, HISTONE METHYLATION, Centromere, Drd1 Gene, Protein Function, Genes, Plant, Article, PROGRAMMED CELL-DEATH, Transcriptionally Silent Information Repeat, LEAVES, Protein Content, LEAF SENESCENCE, WILD-TYPE, CHLOROPHYLL DEGRADATION, 580, ENDOGENOUS TARGETS, Gene Repression, IDENTIFICATION, Arabidopsis Proteins, Gene Expression Profiling, Nonhuman, Plant Leaves, Mutation, RNA, Centromeric Repeat, Genome-Wide Association Study, Transcription Factors
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