Gene Details:

• MSU gene ID: LOC_Os03g61050
• RAPdb gene ID: Os03g0825700
• Gene Symbol: OsDEX1
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Here we report a role of OsDEX1 (Defective in Exine Formation 1 in rice), a Ca2+ binding protein, in regulating rice tapetal cell degradation and pollen formation.
• In OsDEX1 anthers, tapetal cell degeneration is delayed and degradation of the callose wall surrounding the microspores is compromised, leading to aborted pollen formation and complete male sterility.
• Phylogenetic analysis revealed that OsDEX1 may have a conserved function in binding Ca2+ in flowering plants, and genetic complementation of pollen wall defects in an Arabidopsis dex1 mutant confirmed its evolutionary conservation during pollen development.
• Collectively, these findings suggest that OsDEX1 plays a conserved role in the development of tapetal cells and pollen formation, possibly via changing the Ca2+ homeostasis during pollen development.
• OsDEX1 transcript is observed in tapetal cells and microspores during the early anther development.
• Recombinant OsDEX1 is able to bind Ca2+ and regulate Ca2+ homeostasis in vitro, and OsDEX1 showed disturbed Ca2+ homeostasis in tapetal cells.

Function-related keywords:

• pollen ,  anther ,  sterility ,  development ,  homeostasis ,  tapetal ,  anther-development ,  pollen-development ,  pollen-wall ,  male-sterility

Literature:

• A Rice Ca2+ Binding Protein Is Required for Tapetum Function and Pollen Formation .  DOI:  10.1104/pp.16.01261 ;  PMID:  27663411

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: