Flowering time regulation by the SUMO E3 ligase SIZ1

摘要

Flowering is a developmental process, which is influenced by chemical and environmental stimuli. Recently, our research established that the Arabidopsis SUMO E3 ligase, AtSIZl, is a negative regulator of transition to flowering through mechanisms thatreduce salicylic acid (SA) accumulation and involve SUMO modification of FLOWERING LOCUS D (FLD). FLD is an autonomous pathway determinant that represses the expression of FLOWERING LOCUS C(FLC), a floral represser. This addendum postulates mechanisms by which SIZl-mediated SUMO conjugation regulates SA accumulation and FLD activity.