How Arabidopsis Receptor-Like Kinase 7 (RLK7) Manifests: Delineating Its Structure and Function

Figure 4

Interaction of RLK7 with peptides. Upon sensing bacteria, RLK7 interacts with PIP1 and triggers a downstream signal. While BAK1 may interact with the PIP1-RLK7 complex, both are phosphorylated, OSTI increases ROS production, and Ca²⁺ ion carriers activate the SLAC1 channel and close the stomata. RLK7-PIP1 may also interact with APEX upon detection of fungal chitin. Moreover, RLK7 can also interact with either PIP2 or TOLS2 to control lateral root initiation. Furthermore, RLK7 interacts with PIP3 and induces salt tolerance in the presence of salt. MPK3/MPK6 is phosphorylated to initiate the respective gene expressions in all cases.