Gene Details:

• MSU gene ID: LOC_Os01g47050
• RAPdb gene ID: Os01g0659900
• Gene Symbol: OsFBK1
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• OsFBK1 was also functionally validated in susceptible PB1 rice cultivar and Arabidopsis for providing drought tolerance.
• The OsFBK1 E3 ligase subunit affects anther and root secondary cell wall thickenings by mediating turn-over of a cinnamoyl-CoA reductase.
• Rice transgenics of OsFBK1 displayed variations in anther and root secondary cell wall content; it could be corroborated by electron/confocal microscopy and lignification studies, with no apparent changes in auxin content/signalling pathway.
• Interestingly, the OsCCR knock-down transgenics also displayed a decrease in root and anther lignin depositions, suggesting that OsFBK1 plays a role in the development of rice anthers and roots by regulating the cellular levels of a key enzyme controlling lignification.
• We have identified the putative orthologue genes of the rice microRNA pathway for ORYZA SATIVA DAWDLE (OsDDL) and ORYZA SATIVA SERRATE (OsSE), and demonstrated that EP3 and OsFBK1 affect their transcript levels as well as those of CROWN ROOT DEFECT 1/ORYZA SATIVA Exportin-5 HASTY (CRD1/OsHST), ORYZA SATIVA DICER-LIKE 1 (OsDCL) and ORYZA SATIVA WEAVY LEAF1 (OsWAF1).
• The Rice EP3 and OsFBK1 E3 ligases alter plant architecture and flower development, and affect transcript accumulation of microRNA pathway genes and their targets.
• Loss, reduction or gain of function lines for EP3 and OsFBK1, show that EP3 and OsFBK1 affect plant architecture, organ size, floral organ number and size, floral morphology, pollen viability, grain size and weight.

Function-related keywords:

• drought ,  tolerance ,  drought-tolerance ,  root ,  anther ,  development ,  auxin ,  cell-wall ,  lignin ,  flower ,  pollen ,  grain ,  grain-size ,  floral ,  architecture ,  floral-organ ,  flower-development ,  crown ,  crown-root ,  plant-architecture ,  organ-size ,  floral-organ-number

Literature:

• Analysis of drought-responsive signalling network in two contrasting rice cultivars using transcriptome-based approach .  DOI:  10.1038/srep42131 ;  PMID:  28181537
• The OsFBK1 E3 Ligase Subunit Affects Anther and Root Secondary Cell Wall Thickenings by Mediating Turnover of a Cinnamoyl-CoA Reductase .  DOI:  10.1104/pp.17.01733 ;  PMID:  29295941
• The rice EP3 and OsFBK1 E3 ligases alter plant architecture and flower development, and affect transcript accumulation of microRNA pathway genes and their targets .  DOI:  10.1111/pbi.13710 ;  PMID:  34543503

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: