Gene Details:

• MSU gene ID: LOC_Os03g51230
• RAPdb gene ID: Os03g0722400
• Gene Symbol: OsDDM1b
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• OsDDM1b Controls Grain Size by Influencing Cell Cycling and Regulating Homeostasis and Signaling of Brassinosteroid in Rice.
• We further analyzed the OsDDM1b T-DNA insertion loss-of-function of mutant, which exhibited dwarfism, smaller organ size, and shorter and wider grain size than the wild type (Hwayoung, HY), yet no difference in 1,000-grain weight.
• Consistent with the grain size, the outer parenchyma cell layers of lemma in OsDDM1b developed more cells with decreased size.
• OsDDM1b encoded a nucleus, membrane-localized protein and was distributed predominately in young spikelets and seeds, asserting its role in grain size.
• We detected changes in the expression levels of the BR signaling pathway and feedback-inhibited genes with and without exogenous BR application, and the alterations of expression were also observed in grain size-related genes in the OsDDM1b.
• Altogether, our results suggest that OsDDM1b plays a crucial role in grain size via influencing cell proliferation and regulating BR signaling and homeostasis.
• Meanwhile, the OsDDM1b was less sensitive to brassinosteroids (BRs) while the endogenous BR levels increased.

Function-related keywords:

• grain ,  grain-size ,  brassinosteroid ,  BR ,  Brassinosteroid ,  BR-signaling ,  homeostasis ,  lemma ,  cell-proliferation ,  grain-weight ,  organ-size

Literature:

• DDM1 (decrease in DNA methylation) genes in rice (Oryza sativa) .  DOI:  10.1007/s00438-012-0717-5 ;  PMID:  22915302
• The ortholog of DDM1 is mainly required for CHG and CG methylation of heterochromatin and is involved in DRM2-mediated CHH methylation that targets mostly genic regions of the rice genome .  DOI:  10.1104/pp.16.00393 ;  PMID:  27208249
• OsDDM1b Controls Grain Size by Influencing Cell Cycling and Regulating Homeostasis and Signaling of Brassinosteroid in Rice .  DOI:  10.3389/fpls.2022.873993 ;  PMID:  35463416

Related News:

Gene Resources:

• NCBI ID: CT835129
• UniProt accessions:

Sequences: