Flowering in higher plants is controlled by both the internal and environmental cues. In Arabidopsis, several major genetic loci have been defined as the key switches to control flowering. The Flowering Locus C (FLC) ...Flowering in higher plants is controlled by both the internal and environmental cues. In Arabidopsis, several major genetic loci have been defined as the key switches to control flowering. The Flowering Locus C (FLC) gene has been shown in the autonomous pathway to inhibit the vege-tative-to-reproductive transition. FLC appears to be re-pressed by Flowering Locus D (FLD), which encodes a com-ponent of the histone deacetylase complex. Here we report the identification and characterization of a new mutant allele fld-5. Genetic analysis indicates that fld-5 (in the Was-silewskija background) is allelic to the previously character-ized fld-3 and fld-4 (in the Colombia-0 background). Genetic and molecular analyses reveal that fld-5 carries a frame-shift mutation, resulting in a premature termination of the FLD open reading frame. The FLC expression is remarkably in-creased in fld-5, which presumably attributes to the ex-tremely delayed flowering phenotype of the mutant.展开更多
基金This work was supported by the Chinese Academy of Sciences,the National Natural Science Foundation of China(Grant No.30125025&30221002)The Ministry of Science and Technology of China
文摘Flowering in higher plants is controlled by both the internal and environmental cues. In Arabidopsis, several major genetic loci have been defined as the key switches to control flowering. The Flowering Locus C (FLC) gene has been shown in the autonomous pathway to inhibit the vege-tative-to-reproductive transition. FLC appears to be re-pressed by Flowering Locus D (FLD), which encodes a com-ponent of the histone deacetylase complex. Here we report the identification and characterization of a new mutant allele fld-5. Genetic analysis indicates that fld-5 (in the Was-silewskija background) is allelic to the previously character-ized fld-3 and fld-4 (in the Colombia-0 background). Genetic and molecular analyses reveal that fld-5 carries a frame-shift mutation, resulting in a premature termination of the FLD open reading frame. The FLC expression is remarkably in-creased in fld-5, which presumably attributes to the ex-tremely delayed flowering phenotype of the mutant.
