Direct transcriptional control of the Arabidopsis immune receptor FLS2 by the ethylene-dependent transcription factors EIN3 and EIL1.
basic_science · Level V
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- Record sourced from PubMed, PMID 20663954.
- Also identified by DOI 10.1073/pnas.1003347107 and PMC identifier 2922558.
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Abstract
In plant innate immunity, the leucine-rich repeat receptor kinase FLS2 recognizes the bacterial pathogen-associated molecular pattern (PAMP) flagellin. The molecular mechanisms underlying PAMP perception are not fully understood. Here, we reveal that the gaseous phytohormone ethylene is an integral part of PAMP-triggered immunity. Plants mutated in the key ethylene-signaling protein EIN2 are impaired in all FLS2-mediated responses, correlating with reduced FLS2 transcription and protein accumulation. The EIN3 and EIN3-like transcription factors, which depend on EIN2 activity for their accumulation, directly control FLS2 expression. Our results reveal a direct role for ethylene in regulation of an innate immune receptor.
Medical subject headings
- Arabidopsis Proteins
- Gene Expression Regulation, Plant
- Nuclear Proteins
- Protein Kinases
- Receptors, Immunologic
- Transcription Factors