Abstract
Lipopolysaccharide (LPS), which is a primary constituent of the outer membrane of gram-negative bacteria, is a pathogen-associated molecular pattern. Although LPS causes defense-related responses in plants, none of the molecules consisting of the LPS recognition mechanism have been identified. Previously, we had characterized A. thaliana LPS-binding protein 2 (AtLBP2) and suggested the relationship between AtLBP2 and plant innate immune responses. In this study, we focused the detailed function of AtLBP2 in LPS recognition of plants.
On the other hand, we had reported the LPS-induced A. thaliana seedling growth inhibition. In this study, we showed that LPS recognition (LPS-induced defense responses) was consistent with growth inhibition of seedlings. These results suggest that seedling growth inhibition assay using LPS will be informative to identify LPS receptor protein or the other signaling molecules of plants.
