Pattern recognition receptors in plants articles from across Nature Portfolio

Reactive oxygen species are major regulatory molecules in diverse cellular processes. This article shows how an Arabidopsis thiol peroxidase, PRXIIB, senses endogenous H₂O₂ and regulates immune responses through a redox relay mechanism.

Comparative genomic analysis of 350 plant species reveals that cell-surface and intracellular immune receptor gene families co-expand or co-contract. This suggests an evolutionary relationship between the two branches of the plant immune system.

A structural analysis focusing on plant immunity reveals how LRR-containing receptor-like proteins recognize pathogenic ligands and consequently become activated, with the data suggesting that these proteins target pathogens through two different mechanisms.

Iron homeostasis is known to influence plant immune signaling. Here the authors characterize SRF3, a receptor kinase that acts as a negative regulator of callose synthesis, that is required for root responses to iron deficiency and pathogen signals.

How pathogen signals perceived by receptor kinases activate plant immunity is not fully understood. Here the authors show that phosphocoding of a shared phosphatase ensures signalling from growth and immune receptors to specific cellular responses.