Cell-surface pattern recognition receptors: Emerging players in plant-oomycete interactions
Biying Sun1, Chongyuan Zhang1, Tian Wang1
1State Key Laboratory of Agricultural and Forestry Biosecurity, College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
Abstract:
Plants rely on a two-tiered innate immune system to detect and fend off microorganism infections. This system comprises cell-surface pattern recognition receptors (PRRs) and intracellular nucleotide-binding leucine-rich repeat receptors (NLRs), both of which have been extensively characterized in the model plant Arabidopsis thaliana (hereafter Arabidopsis) and various crop species. Historically, NLR-mediated immunity has been more intensively studied in the context of plant-oomycete interactions compared to PRR-mediated immunity, primarily due to conferring stronger resistance. Recently, however, the identification of novel PRRs and elucidation of their underlying molecular mechanisms in crops have significantly heightened interest in PRR-mediated immunity against oomycetes. Meanwhile, recent advances reveal that oomycete PRRs can perceive host-derived molecules that contribute to virulence. Therefore, this review provides an overview of recent notable advances in understanding PRR-mediated immunity and signal perception during plant-oomycete interactions, with a specific emphasis on the receptor identification, signaling cascades, and molecular mechanisms governing PRR responses to oomycete infection.
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