The E3 ligase XBAT35 mediates thermoresponsive hypocotyl growth by targeting ELF3 for degradation in <i>Arabidopsis</i>

Plants are capable of coordination their growth and development with ambient temperatures. EARLY FLOWERING3 (ELF3), an essential component the plant circadian clock, is also involved in temperature sensing, as well inhibiting expression protein activity thermoresponsive regulator phytochrome interacting factor 4 (PIF4). The ELF3 subjected to attenuation response warm temperature; however, how level regulated at remains less understood. Here, we report that E3 ligase XB3 ORTHOLOG 5 IN ARABIDOPSIS THALIANA, XBAT35, mediates degradation. XBAT35 interacts ubiquitinates ELF3. Loss-of-function mutation increases confers a short-hypocotyl phenotype under conditions. Thus, our findings establish degradation lift inhibition on PIF4 for promoting hypocotyl plants.