NbLRK1, an INF1 interact protein, involve in defense response against Phytophthora infestans.

Shao Fang; Wang Haixia; Tian Zhejuan; Tian Zhendong

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NbLRK1, an INF1 interact protein, involve in defense response against Phytophthora infestans.

Shao Fang,Wang Haixia,Tian Zhejuan,Tian Zhendong * #

Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, Hubei, 430070, China

*Correspondence author

#Submitted by

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Funding: National High Technology Project of China （No.2013AA102603), National Natural Science Foundation of China [No.31171603], Doctoral Program of Higher Education of China）

Opened online:11 December 2015

Accepted by: none

Citation: Shao Fang,Wang Haixia,Tian Zhejuan.NbLRK1, an INF1 interact protein, involve in defense response against Phytophthora infestans.[OL]. [11 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4668879

INF1 is an extracellular protein secreted by the oomycete Phytophthora infestans, the causal agent of late blight disease in potato. INF1 triggers a wide range of defense responses in most Nicotiana species. Previous studies have shown that INF1 interact with a B-lectin-like receptor kinase, NbLRK1, suggesting that NbLRK1 is a component of the N. benthamiana protein complex that recognizes INF1 elicitor and transduces the HR signal. In this study, functions of NbLRK1 in late blight resistance and in INF1 mediated HR were further investigated. Our results confirmed that silencing of NbLRK1 delayed INF1-mediated HR in N. benthamiana. Silencing of NbLRK1 in N. benthamiana enhances susceptibility to P. infestans accompanied by reduced deposition of H2O2 response to INF1 induction. The N. benthamiana SERK3/BAK1 protein maybe interact with NbLRK1 at the membrane in planta suggesting INF1, NbLRK1 and NbSERK3/BAK1 form a complex to manipulate PTI in N. benthamiana.

Keywords:NbLRK1; INF1; late blight, plant immunity.

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