Dataset Information

Histone H3K4me3 and H3K27me3 regulatory genes control stable transmission of an epimutation in rice.

ABSTRACT: DNA methylation loss can produce inheritable active epialleles in plants. The mechanism involved in the stable transmission of hypomethylated epimuations is presently not clear. Here we show that maintenance of a stably hypomethylated active epiallele in rice required a CHD3 protein (CHR729) and that over-expression of an H3K4me3 demethylase (JMJ703) or H3K27me3 methyltransferase (SDG711) could stably resilence the epiallele. CHR729 and JMJ703 have antagonistic function in H3K4me3 in maintaining the active state of the epiallele, whereas SDG711-mediated H3K27me3 was sufficient to stably repress the locus. The data suggest that H3K4me3 and H3K27me3 controlled by these chromatin regulators may be involved in stable transmission/resetting of epigenetic variation in rice.

SUBMITTER: Chen X

PROVIDER: S-EPMC4541256 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature

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Histone H3K4me3 and H3K27me3 regulatory genes control stable transmission of an epimutation in rice.

Chen Xiangsong X Liu Xiaoyun X Zhao Yu Y Zhou Dao-Xiu DX

Scientific reports 20150819

DNA methylation loss can produce inheritable active epialleles in plants. The mechanism involved in the stable transmission of hypomethylated epimuations is presently not clear. Here we show that maintenance of a stably hypomethylated active epiallele in rice required a CHD3 protein (CHR729) and that over-expression of an H3K4me3 demethylase (JMJ703) or H3K27me3 methyltransferase (SDG711) could stably resilence the epiallele. CHR729 and JMJ703 have antagonistic function in H3K4me3 in maintaining ...[more]

PMID: 26285801

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Project description:Plant growth and development occurs through meristematic cell activity, and cell fate transition is accompanied by epigenetic modifications. Callus with cell pluripotency exhibits the ability to undergo continued cell division, and is ideal for studying plant meristematic differentiation. By comparing the differential epigenetic modifications between callus and seedling, the changes in chromatin state and effects of various epigenetic modifications on the growth and development of plants can be revealed, and the key genes related to plant growth and development can be identified, providing novel insights into the regulation of plant growth and development. In this study, we performed ChIP assays using various antibodies in rice seed-induced callus and seedlings grown for about 15 days to examine the differential deposition of H3K27me3 and H3K4me3. Furthermore, data for DNase I-hypersensitive sites in the corresponding tissues were downloaded from National Center for Biotechnology Information. We analyzed 4,562 callus H3K27me3-decreased genes especially those encoding transcription factors in callus, and found that most of the transcription factors, including AP2-ERREBP, NAC, and HB gene families, were related to growth and development. Genes related to meristemization, such as OsWOX9, OsWOX11, OsPLT4, OsPLT5, and OsSHR, were also included. In contrast, H3K4me3 positively regulated callus characteristics through its higher deposition in the callus than in the seedling. We further performed transcriptomic analysis on 45 sets of Affymetrix GeneChip arrays and identified 1,565 genes preferentially expressed in the callus. Callus development and root development in rice were found to share a common regulatory mechanism. We found that these genes, which are associated with meristems, require the removal of H3K27me3 and the deposition of H3K4me3, and DNase I-hypersensitive sites to maintain a relatively active state in the callus than in the seedling. The present study provides novel data about the epigenetic mechanisms involved in callus formation and additional resources for the study of cell division and differentiation in plants.

Dataset Information

Histone H3K4me3 and H3K27me3 regulatory genes control stable transmission of an epimutation in rice.

Publications

Histone H3K4me3 and H3K27me3 regulatory genes control stable transmission of an epimutation in rice.

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