A Raf-like kinase is required for smoke-induced seed dormancy in <i>Arabidopsis thaliana</i>
Inhye Lee, Eunsun Kim, Soobin Choi, Dayoung Kim, Wangyu Hong, Jungki Choi, Hyunmo Choi, Ji-Min Kim, Ganesh A. Sable, Kesavan Markkandan, Dongyeol Lim, Soon Ki Park, Soo Young Kim, Sumin Lee, Moon‐Soo Soh
Abstract
Significance Seed dormancy is an important developmental trait for plants, which ensures seed germination under more favorable spatiotemporal environments. A smoke compound, 3,4,5-trimethylfuran-2( 5H )-one, which is called TMB for short, has been identified to inhibit seed germination in a still elusive way. Here, we presented several lines of evidence that TMB inhibits seed germination through the induction of physiological dormancy. Furthermore, by isolating TMB-resistant Arabidopsis mutants, we demonstrated that TMB RESISTANT1 , encoding a Raf-like kinase, is critically required for the TMB-induced seed dormancy. These results suggest the presence of a smoke sensory pathway that takes part in the multiple layers of the dormancy regulatory network in higher plants.