Analysis of the transcriptional effect of hypoxia on flg22 response
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ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
PROVIDER: GSE246848 | GEO | 2024/07/24
REPOSITORIES: GEO
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Project description:Arabidopsis MPK11 is activated and plays a role in the flg22 sensing. Mitogen-activated protein kinases (MAPKs) mediate cellular signal transduction during stress responses, as well as diverse growth and developmental steps in eukaryotes. Pathogen infection or treatment with conserved pathogen-associated molecular patterns (PAMPs) such as the bacterial flagellin-derived flg22 peptide are known to activate three Arabidopsis thaliana MAPKs, MPK3, MPK4 and MPK6. Several stresses, including flg22 treatment, are known to increase MPK11 expression but activation of MPK11 has not been shown. Here, we show that MPK11 activity can indeed be increased through flg22 elicitation. Expression profiling using a small-scale microarray for defense-related genes revealed that cinnamyl alcohol dehyrogenase 5 (CAD5) requires MPK11 for full flg22-induced expression. An mpk11 mutant showed increased flg22-mediated growth inhibition but no altered susceptibility to Pseudomonas syringae, Botrytis cinerea or Alternaria brassicicola.
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Project description:The goal of this experiment was to identify the early responsive genes activated by the 22 amino acid peptide of bacterial flagellin (flg22) in Arabidopsis seedlings that are involved in the initial responses important for plant innate immunity. We used the microarrays to detail the global program of gene expression underlying intial cellular and molecular responses to microbial associated molecualr patterns (MAMPs). Arabidopsis seedlings were treated with 2 nM flg22 for 30 min and 60 min. Transcript profiles were analyzed and compared between control and treated cells to identify early flg22 responsive genes.
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