Abstract:
:Pattern-recognition receptors (PRRs), which consist of receptor kinases (RKs) and receptor-like proteins, sense microbe- and host-derived molecular patterns associated with pathogen infection to trigger immune responses in plants. Several kinases of the 46-member Arabidopsis (Arabidopsis thaliana) receptor-like cytoplasmic kinase (RLCK) subfamily VII play important roles in pattern-triggered immunity, but it is unclear whether different RLCK VII members act specifically or redundantly in immune signaling. Here, we constructed nine higher order mutants of this subfamily (named rlck vii-1 to rlck vii-9) and systematically characterized their immune phenotypes. The mutants rlck vii-5, -7, and -8 had compromised reactive oxygen species production in response to all patterns tested, indicating that the corresponding members are broadly required for the signaling of multiple PRRs. However, rlck vii-4 was defective specifically in chitin-induced reactive oxygen species production, suggesting that RCLK VII-4 members mediate the signaling of specific PRRs. Furthermore, RLCK VII-4 members were required for the chitin-triggered activation of MAPK, demonstrating that these kinases link a PRR to MAPK activation. Moreover, we found that RLCK VII-6 and -8 also were required for RK-mediated root growth. Together, these results show that numerous RLCK VII members are involved in pattern-triggered immune signaling and uncover both common and specific roles of these kinases in plant development and immunity mediated by various RKs.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Rao S,Zhou Z,Miao P,Bi G,Hu M,Wu Y,Feng F,Zhang X,Zhou JMdoi
10.1104/pp.18.00486subject
Has Abstractpub_date
2018-08-01 00:00:00pages
1679-1690issue
4eissn
0032-0889issn
1532-2548pii
pp.18.00486journal_volume
177pub_type
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