Abstract:

In the process of long-term adaptation to environment, plants have evolved a large number of cell surface and intracellular immune receptors to sense various biological and abiotic stimuli, and then trigger receptor-dependent immune responses. Cell surface Pattern-Recognition Receptor（PRR）is able to recognize pathogenic microbial model molecules and activate basic immunity, thereby enabling plants to acquire corresponding tolerance. At present, with the help of efficient research methods, researchers have made some progress in PRR-mediated plant disease resistance and environmental stress tolerance. Here, we reviewed the recent achievements of plant PRR on types and structures, ligand recognition and binding mechanisms, characteristics and mechanism of innate immunity mediated by PRRs, and identification of novel PRRs. Meanwhile, this review also focused on PRR-mediated salt resistance. The results will help us further understand the immune basis of plant-environment interaction, and will provide theoretical basis and guidance for the use of genetic engineering to cultivate excellent disease resistant and stress resistant plant varieties.

Key words: pattern-recognition receptor, receptor-like kinase, receptor-like protein, receptor recognition, innate immunity, abiotic stress, salt stress, receptor identification