A plant cell death-inducing protein from litchi interacts with Peronophythora litchii pectate lyase and enhances plant resistance

Wen Li, Peng Li, Yizhen Deng, Junjian Situ, Zhuoyuan He, Wenzhe Zhou, Minhui Li, Pinggen Xi, Xiangxiu Liang, Guanghui Kong () and Zide Jiang ()
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Wen Li: South China Agricultural University
Peng Li: South China Agricultural University
Yizhen Deng: South China Agricultural University
Junjian Situ: South China Agricultural University
Zhuoyuan He: South China Agricultural University
Wenzhe Zhou: South China Agricultural University
Minhui Li: South China Agricultural University
Pinggen Xi: South China Agricultural University
Xiangxiu Liang: South China Agricultural University
Guanghui Kong: South China Agricultural University
Zide Jiang: South China Agricultural University

Nature Communications, 2024, vol. 15, issue 1, 1-18

Abstract: Abstract Cell wall degrading enzymes, including pectate lyases (PeLs), released by plant pathogens, break down protective barriers and/or activate host immunity. The direct interactions between PeLs and plant immune-related proteins remain unclear. We identify two PeLs, PlPeL1 and PlPeL1-like, critical for full virulence of Peronophythora litchii on litchi (Litchi chinensis). These proteins enhance plant susceptibility to oomycete pathogens in a PeL enzymatic activity-dependent manner. However, LcPIP1, a plant immune regulator secreted by litchi, binds to PlPeL1/PlPeL1-like, and attenuates PlPeL1/PlPeL1-like induced plant susceptibility to Phytophthora capsici. LcPIP1 also induces cell death and various immune responses in Nicotiana benthamiana. Conserved in plants, LcPIP1 homologs bear a conserved “VDMASG” motif and exhibit immunity-inducing activity. Furthermore, SERK3 interacts with LcPIP1 and is required for LcPIP1-induced cell death. NbPIP1 participates in immune responses triggered by the PAMP protein INF1. In summary, our study reveals the dual roles of PlPeL1/PlPeL1-like in plant-pathogen interactions: enhancing pathogen virulence through PeL enzymatic activity while also being targeted by LcPIP1, thus enhancing plant immunity.

Date: 2024
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DOI: 10.1038/s41467-023-44356-y

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