Figure 4.

Light/photoperiod- and phytohormone-dependent thermoresponsive pathways converge at PIF4. Here, light and circadian clock components are integrated with temperature information to mediate thermoresponsive growth, which is controlled by phytohormone signaling. The thermosensory machinery is mainly controlled by phyB, while the roles of other light receptors are still largely elusive. PIF4 mainly mediates thermomorphogenesis by promoting auxin biosynthesis and signaling, while BR signaling plays an important downstream function. For further details on the components of these pathways, see the main text.