Plant pattern-recognition receptor (PRR) (PRR)

Plant pattern-recognition receptors (PRRs) are a diverse class of membrane-bound proteins, primarily categorized as receptor-like kinases (RLKs) and receptor-like proteins (RLPs), that function as the primary sensors of the plant innate immune system (Boutrot and Zipfel, 2017). They are responsible for detecting conserved microbial signatures known as pathogen-associated molecular patterns (PAMPs) or damage-associated molecular patterns (DAMPs), which initiates a robust defense response termed pattern-triggered immunity (PTI) (Zipfel, 2014). This activation leads to rapid physiological changes, including the production of reactive oxygen species (ROS), activation of mitogen-activated protein kinase (MAPK) cascades, and the induction of defense-related genes (The Plant Journal, 2018). In the context of agricultural biotechnology, PRRs are significant targets for elicitors such as chitosan and harpin proteins, which are used to prime plant immunity and provide broad-spectrum protection against fungal, bacterial, and viral pathogens (Henry et al., 2012). Furthermore, PRRs are central to genetic engineering strategies aimed at transferring high-affinity receptors between plant species to enhance crop resilience and reduce reliance on chemical pesticides (Zhang et al., 2024). These receptors also play a role in maintaining homeostatic associations with beneficial or commensal microbes, ensuring a balanced response to the plant's environment (The Plant Journal, 2018).

Other names

Plant PRRReceptor-like kinaseRLKReceptor-like proteinRLPPattern-recognition receptor (plants)

Recognition of conserved molecular patterns (PAMPs/MAMPs/DAMPs) leading to the activation of pattern-triggered immunity (PTI) and downstream defense signaling.