An Insect Salivary Sheath Protein Triggers Plant Resistance to Insects and Pathogens as a Conserved HAMP.

ABSTRACT: Herbivore-associated molecular patterns (HAMPs) in saliva enable plants to detect herbivores and activate pattern-triggered immunity (PTI). Piercing-sucking herbivores secrete gel saliva, forming salivary sheaths that assist in feeding, however, the role of proteins within these sheaths in modulation of plant defenses remains poorly understood. Here, a thermostable HAMP, myosin light chain 1-like (myosin) is identified, from the salivary sheath of the small brown planthopper (SBPH) Laodelphax striatellus. Myosin is a widely conserved arthropod protein, and acts as an elicitor of BAK1-dependent PTI responses in several plant species. Plants are able to specifically recognize the myosin 41-amino-acid peptide (MP41), which acts as a minimal immunogenic epitope. Furthermore, myosin and MP41 st

SUBMITTER: Qi L 

PROVIDER: S-EPMC12140304 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature