Our latest paper (https://doi.org/10.1093/plcell/koaf200), published online in Plant Cell, shows that Gibberellins are involved in long-distance signalling of phytochrome-sensed light signals all the way in to the roots that are not light-exposed but still respond to light quality changes. We think that not only the precursor GA12, but also bioactive GA4 is shoot-to-root mobile. The work was led by former postdoc Kasper van Gelderen, now PI in COS Heidelberg, and involved major contributions on nitty gritty GA manipulations and microscopy by PhD candidate Kyra Van der Velde.