SL1,OsJAG

• Symbol: SL1,OsJAG
• MSU: LOC_Os01g03840
• RAPdb: Os01g0129200

• Molecular cloning and functional characterization of OsJAG gene based on a complete-deletion mutant in rice Oryza sativa L., 2010, Plant Mol Biol.
• Rice open beak is a negative regulator of class 1 knox genes and a positive regulator of class B floral homeotic gene, 2009, Plant J.
• STAMENLESS 1, encoding a single C2H2 zinc finger protein, regulates floral organ identity in rice, 2009, Plant J.

Genbank accession number

• OsJAG is an important gene with pleiotropy, expressing almost throughout the plant and acting in both vegetative phase and reproductive phase
• The sl1 mutant largely resembles the rice B-class gene mutant spw1; both exhibit homeotic conversions of lodicules and stamens to palea/lemma-like organs and carpels
• Loss of OsJAG function results in maldevelopment of all floral organs, such as degenerated lemma and palea, elongated lodicules and deformed and sterile pistil
• Additionally, sl1 produces flowers with varied numbers of inner floral organs, and amorphous tissues without floral organ identity were frequently formed in whorls 3 and 4
• Here, we report molecular cloning and characterization of the rice STAMENLESS 1 (SL1) gene that is involved in floral development
• The functional divergence between SL1 and JAG implies that SL1 was co-opted for its distinctive roles in specification of floral organ identity in rice after the lineage split from Arabidopsis
• We also show that SL1 specifies lodicule and stamen identities through positive transcriptional regulation of SPW1/OsMADS16 expression
• Interestingly, OsJAG does not affect the number of floral organ primordial and so of floral organs in each whorl, suggesting that OsJAG does not influence the initiation of floral organ primordia, but affect the developmental fate of all floral organs after their primordia have initiated

• OsMADS16~SPW1, SL1~OsJAG, STAMENLESS 1, encoding a single C2H2 zinc finger protein, regulates floral organ identity in rice, We also show that SL1 specifies lodicule and stamen identities through positive transcriptional regulation of SPW1/OsMADS16 expression
• OsMADS16~SPW1, SL1~OsJAG, STAMENLESS 1, encoding a single C2H2 zinc finger protein, regulates floral organ identity in rice, The sl1 mutant largely resembles the rice B-class gene mutant spw1; both exhibit homeotic conversions of lodicules and stamens to palea/lemma-like organs and carpels