由此引发猜想:是否不同的MAPKKKs,如YDA和MAPKKK3 / MAPKKK5,可能位于同一个MKK4/MKK5-MPK3/MPK6模块的上游,形成两个独立的MAPK级联反应,分别传递植物生长/发育和免疫信号? 近日,JIPB与Plant Physiology在线分别发表了密苏里大学生化系...
此外,这三个MAPKKKs也在MKK4/MKK5-MPK3/MPK6的上游起调控花器官脱落的作用;另一方面,在yda-11 mapkkk3 mapkkk5三突变体中,PAMP触发的MAPK激活比在mapkkk3 mapkkk5双突中进一步减弱,菌注射结果也显示该mapkkk三突比yda-11单突和mapkkk3 mapkkk5双突更感病,表明这三个MAPKKKs,YDA、MAPKKK3和MAPKKK5都在PRRs...
Epistatic analyses demonstrated that the expression of constitutively active MKK4, MKK5, or YDA driven by the RGI2 promoter can rescue the short-root phenotype of the rgi1/2/3/4/5 mutant. Taken together, these results suggest that the YDA-MKK4/MKK5-MPK3/MPK6 cascade functions downstream of...
Similar to rgi1/2/3/4/5 quintuple mutant, loss of function of MPK3 and MPK6, MKK4 and MKK5, or YDA leads to a short root phenotype, which is associated with reduced mitotic activity and lower expression of PLETHORA 1 (PLT1)/PLT2 in the RAM. Furthermore, MPK3/MPK6 activation in ...
mapkkk5 yda double mutant and mapkkk3 mapkkk5 yda triple mutants were embryo lethal,similar to the mpk3 mpk6 double mutants.These results demonstrate that YDA,MAPKKK3,and MAPKKK5 have overlapping functions upstream of the MKK4/MKK5–MPK3/MPK6 module in both plant immunity and growth/...