Gene Details:

• MSU gene ID: LOC_Os01g11952
• RAPdb gene ID: Os01g0218800
• Gene Symbol: OsSDG721 SDG721
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Transgenic plants overexpressing OsSDG721 showed saline-alkaline stress-tolerant phenotypes, along with increased leaf angle, advanced heading and ripening dates.
• By contrast, OsSDG721 loss-of-function mutants showed increased sensitivity to saline-alkaline stress characterized by decreased survival rates and reduction in plant height, grain size, grain weight and leaf angle.
• Furthermore, we showed that OsSDG721 binds to and deposits the H3K4me3 mark in the promoter and coding region of OsHKT1;5, thereby upregulating OsHKT1;5 expression under saline-alkaline stress.
• Overall, by generating Kitaake activation-tagging pools, we established that the H3K4 methyltransferase OsSDG721 enhances saline-alkaline stress tolerance in rice.
• RNA sequencing (RNA-seq) analysis of wild-type Kitaake and OsSDG721 mutants indicated that OsSDG721 positively regulates the expression level of HIGH-AFFINITY POTASSIUM (K+ ) TRANSPORTER1;5 (OsHKT1;5), which encodes a Na+ -selective transporter that maintains K+ /Na+ homeostasis under salt stress.
• Here, we report that SDG721 (SET-domain group protein 721) and SDG705 are involved in regulating rice development.
• Together, these results suggest that SDG721 and SDG705 regulate H3K4 methylation, which is crucial for plant development in rice.
• Loss of SDG721 and SDG705 function resulted in GA-deficient phenotypes, including semi-dwarfism, reduced cell length, and reduced panicle branching.
• The transcripts levels and H3K4me3 levels of GA biosynthesis genes and GA signaling pathway genes were downregulated in the SDG721 sdg705 plants.

Function-related keywords:

• leaf ,  grain ,  alkaline-stress ,  salt ,  tolerance ,  potassium ,  grain-size ,  salt-stress ,  stress ,  homeostasis ,  transporter ,  plant-height ,  methyltransferase ,  grain-weight ,  stress-tolerance ,  leaf-angle ,  development ,  plant-development ,  panicle ,  ga ,  branching ,  GA ,  GA-biosynthesis

Literature:

• SET DOMAIN GROUP 721 protein functions in saline-alkaline stress tolerance in the model rice variety Kitaake .  DOI:  10.1111/pbi.13683 ;  PMID:  34416090
• SDG721 and SDG705 are required for rice growth .  DOI:  10.1111/jipb.12644 ;  PMID:  29473711

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: