AGL24 acts in concert with SOC1 and FUL during Arabidopsis floral transition.
Arabidopsis plants flower in response to long days (LDs). Exposure of leaves to inductive day lengths activates expression of FLOWERING LOCUS T (FT) protein which moves to the shoot apical meristem (SAM) to induce developmental reprogramming. SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1) and FRUITFULL (FUL) are induced by FT at the apex. We previously screened the SAM for mRNAs of genes required to promote the floral transition in response to photoperiod, and conducted detailed expression and functional analyses on several putative candidates. Here, we show that expression of AGAMOUS-LIKE 24 (AGL24) is detected at the SAM under SD conditions and increases upon exposure to LDs. Mutations in AGL24 further delay flowering of a soc1 ful double mutant, suggesting that flowering is controlled by AGL24 partly independently of SOC1 and FUL.
Max Planck Institute for Plant Breeding Research, Cologne, Germany. torti@nomadbioscience.com
Stefano
S
Torti
Fabio
F
Fornara
D017360:Arabidopsis / Q000235:genetics / Q000254:growth & development*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D035264:Flowers / Q000235:genetics / Q000254:growth & development*; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D026161:MADS Domain Proteins / Q000235:genetics / Q000378:metabolism*; D018519:Meristem / Q000235:genetics / Q000254:growth & development; D008954:Models, Biological; D009154:Mutation / Q000235:genetics; D010641:Phenotype; D017440:Photoperiod
C419046:AGL20 protein, Arabidopsis; C478065:AGL24 protein, Arabidopsis; C097414:AGL8 protein, Arabidopsis; D029681:Arabidopsis Proteins; D026161:MADS Domain Proteins