Abstract
It has been suggested the presence of the close relationship between the morphogenesis and defense responses in plant. But Molecular mechanism of its relationship is unknown. To make clear it, we analyzed Arabidopsis semi-dominant mutant uni-1d, which formed ectopic many lateral shoots and constitutively expressed defense response genes. UNI encoded a novel NBS-LRR family protein and uni-1d has missense mutation causing a gain-of-function. These results suggested that mtant UNI (mUNI) may activate signal transduction pathways of both morphogenesis and defense response. Analysis of double mutants between uni-1d and some defense response related mutants indicated that mUNI affected the morphogenesis without a part of defense response. In addition, a suppressor mutant restored only morphological phenotype in uni-1d was isolated. Here, we want to discuss a signal transduction pathway of mUNI-downstream.
