Work

The leucine-rich repeat receptor-like kinase PpLRR1 enhances peach resistance to Xanthomonas arboricola pv. pruni

Year: 2025

Type: article

Abstract: Plants have evolved sophisticated defense mechanisms to counter pathogen infections, among which the hypersensitive response (HR) mediated by leucine-rich repeat receptor-like kinases (LRR-RLKs) plays a key role in limiting pathogen spread. However, whether LRR-RLKs mediate HR to confer resistance against Xanthomonas arboricola pv. pruni (Xap) in peach (Prunus persica) remains unclear. This study identified the LRR-RLK gene family member, PpLRR1, which was significantly upregulated in response to Xap infection. Functional analysis revealed that PpLRR1 is essential for HR signaling and enhances resistance to pathogen attack. Transient overexpression of PpLRR1 significantly reduced disease symptoms, whereas its silencing aggravated infection. Further studies demonstrated that the MYB transcription factor PpLIMYB directly binds to the PpLRR1 promoter and activates its transcription. These findings highlight the important role of the PpLIMYB-PpLRR1 regulatory module in peach disease resistance. This study advances the understanding of disease resistance mechanisms in woody plants and identifies a potential target for breeding disease-resistant cultivars.

Source: Fruit Research

DOI: 10.48130/frures-0025-0029