Within the ambient temperature range, FLM is differentially spliced in a temperature-dependent manner through the alternative use of the exons 2 (FLM-ß) and 3 (FLM-δ). Based on transgenic experiments, a model was proposed according to which FLM-ß and FLM-δ function antagonistically with SVP. Accordingly, FLM-ß engages in flowering repressive interactions with SVP in cooler temperatures. Conversely, FLM-δ would outcompete FLM-ß in warmer temperatures and form heterodimers with SVP unable to bind DNA and repress flowering (Lee et al., 2013; Posé et al., 2013). Recent data suggest that this attractive model, based solely on transgenic experiments, may not be valid in natural contexts (Sureshkumar et al., 2016; Lutz et al., 2015).