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Author Liu X., Zhou S., Wang W., Ye Y., Zhao Y., Xu Q., Zhou C., Tan F., Cheng S., Zhou D.X.
Title Regulation of histone methylation and reprogramming of gene expression in the rice inflorescence meristem.
Abstract:
Rice inflorescence meristem (IM) activity is essential for panicle development and grain production. How chromatin and epigenetic mechanisms regulate IM activity remains unclear. Genome-wide analysis revealed that in addition to genes involved in the vegetative to reproductive transition, many metabolic and protein synthetic genes were activated in IM compared with shoot apical meristem and that a change in the H3K27me3/H3K4me3 ratio was an important factor for the differential expression of many genes. Thousands of genes gained or lost H3K27me3 in IM, and downregulation of the H3K27 methyltransferase gene SET DOMAIN GROUP 711 (SDG711) or mutation of the H3K4 demethylase gene JMJ703 eliminated the increase of H3K27me3 in many genes. SDG711-mediated H3K27me3 repressed several important genes involved in IM activity and many genes that are silent in the IM but activated during floral organogenesis or other developmental stages. SDG711 overexpression augmented IM activity and increased panicle size; suppression of SDG711 by RNA interference had the opposite effect. Double knockdown/knockout of SDG711 and JMJ703 further reduced panicle size. These results suggest that SDG711 and JMJ703 have agonistic functions in reprogramming the H3K27me3/H3K4me3 ratio and modulating gene expression in the IM.
Journal Plant Cell
Country China
Volume 27(5)
Pages 1428-44
Year 2015
PubMed ID 25957386
PubMed Central ID 4456649
DOI 10.1105/tpc.15.00201
URL -
Relation
Gene CKX4 CLF EG2 ERF102 ERF136 ERF62 GH3-2 GH3-6 GN1A IAA31 IAA8 IDS1 MADS18 MADS23 MADS27 MADS56 NL1 PAP2 RAP1A RAP1B SAUR11 SAUR23 TDC1 WFP YUCCA9 _
INSD -
Strain Wild Core Collection -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
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Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase