A Lectin Receptor-Like Kinase Mediates Pattern-Triggered Salicylic Acid Signaling.
Xuming LuoNing XuJunkai HuangFeng GaoHuasong ZouMarie BoudsocqGitta L CoakerJun LiuPublished in: Plant physiology (2017)
Plant surface-localized pathogen recognition receptors (PRRs) perceive conserved microbial features, termed pathogen-associated molecular patterns (PAMPs), resulting in disease resistance. PAMP perception leads to calcium influx, MAPK activation, a burst of reactive oxygen species (ROS) mediated by RbohD, accumulation of the defense hormone salicylic acid (SA), and callose deposition. Lectin receptor-like kinases (LecRKs) belong to a specific PRR family and are important players in plant innate immunity. Here, we report that LecRK-IX.2 is a positive regulator of PRR-triggered immunity. Pathogen infection activated the transcription of Arabidopsis (Arabidopsis thaliana) LecRK-IX.2, and the LecRK-IX.2 knockout lines exhibited enhanced susceptibility to virulent Pseudomonas syringae pv tomato DC3000. In addition, LecRK-IX.2 is capable of inducing RbohD phosphorylation, likely by recruiting calcium-dependent protein kinases to trigger ROS production in Arabidopsis. Overexpression of LecRK-IX.2 resulted in elevated ROS and SA and enhanced systemic acquired resistance to P. syringae pv tomato DC3000. Our data highlight the importance of LecRKs in plant immune signaling and SA accumulation.
Keyphrases
- reactive oxygen species
- transcription factor
- arabidopsis thaliana
- cell wall
- plant growth
- dna damage
- cell death
- candida albicans
- dendritic cells
- microbial community
- cell proliferation
- protein kinase
- oxidative stress
- binding protein
- high frequency
- electronic health record
- big data
- immune response
- single molecule
- escherichia coli
- cystic fibrosis
- artificial intelligence
- drug induced
- data analysis
- low density lipoprotein
- wild type