The RLCK subfamily VII ‐4 controls pattern‐triggered immunity and basal resistance to bacterial and fungal pathogens in rice - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Plant Journal Year : 2023

The RLCK subfamily VII ‐4 controls pattern‐triggered immunity and basal resistance to bacterial and fungal pathogens in rice

Ahmad Jalilian
Abdolreza Bagheri
Véronique Chalvon
  • Function : Author
  • PersonId : 1205459
Isabelle Meusnier
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  • PersonId : 1376967
Thomas Kroj
Amin Mirshamsi Kakhki

Abstract

Receptor‐like cytoplasmic kinases (RLCKs) mediate the intracellular signaling downstream of pattern‐recognition receptors (PRRs). Several RLCKs from subfamily VII of rice ( Oryza sativa ) have important roles in plant immunity, but the role of RLCK VII‐4 in pattern‐triggered immune (PTI) signaling and resistance to pathogens has not yet been investigated. Here, we generated by multiplex clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR‐associated protein 9‐mediated genome editing rice sextuple mutant lines where the entire RLCK VII‐4 subfamily is inactivated and then analyzed the resulting lines for their response to chitin and flg22 and for their immunity to Xanthomonas oryzae pv. oryzae ( Xoo ) and Magnaporthe oryzae . Analysis of the rlckvii‐4 mutants revealed that they have an impaired reactive oxygen system burst and reduced defense gene expression in response to flg22 and chitin. This indicates that members of the rice RLCK VII‐4 subfamily are required for immune signaling downstream of multiple PRRs. Furthermore, we found that the rice RLCK VII‐4 subfamily is important for chitin‐induced callose deposition and mitogen‐activated protein kinase activation and that it is crucial for basal resistance against Xoo and M. oryzae pathogens. This establishes that the RLCK VII‐4 subfamily has critical functions in the regulation of multiple PTI pathways in rice and opens the way for deciphering the precise role of its members in the control of rice PTI.
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hal-04531163 , version 1 (03-04-2024)

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Ahmad Jalilian, Abdolreza Bagheri, Véronique Chalvon, Isabelle Meusnier, Thomas Kroj, et al.. The RLCK subfamily VII ‐4 controls pattern‐triggered immunity and basal resistance to bacterial and fungal pathogens in rice. Plant Journal, 2023, 115 (5), pp.1345-1356. ⟨10.1111/tpj.16323⟩. ⟨hal-04531163⟩
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