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Arabidopsis thaliana

ABSTRACT: WRKY transcription factors in early MAMP-triggered immunity (ChIP-Seq)

PROVIDER: PRJNA339763 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR4048190.fastq.gz	Fastqsanger.gz
	SRR4048200.fastq.gz	Fastqsanger.gz
	SRR4048210.fastq.gz	Fastqsanger.gz
	SRR4048191.fastq.gz	Fastqsanger.gz
	SRR4048201.fastq.gz	Fastqsanger.gz

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Arabidopsis thaliana

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Project description:During microbe-associated molecular pattern (MAMP)-triggered immunity (MTI) more than 5000 Arabidopsis genes are significantly altered in their expression and the question arises, how such an enormous reprogramming of the transcriptome can be regulated in a safe and robust manner? For the WRKY transcription factors, which are important regulators not only of this defense response, it appears that they act in a complex regulatory sub-network rather than in a linear fashion, which is much more vulnerable to gene function loss either by pathogen-derived effectors or by mutations. In this study we employed RNA-seq, mass spectrometry and ChIP-seq to find evidence for and uncover principles and characteristics of this network.

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Principles and characteristics of the WRKY regulatory network of early MAMP-triggered immunity [RNA-Seq]

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Project description:Principles and characteristics of the WRKY regulatory network of early MAMP-triggered immunity [RNA-Seq]

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Arabidopsis CBP60g Contributes to MAMP-Induced SA Accumulation and Is Involved in Disease Resistance

Project description:Salicylic acid (SA)-induced defense responses are important factors during effector triggered immunity and microbe-associated molecular pattern (MAMP)-induced immunity in plants. This article presents evidence that a member of the Arabidopsis CBP60 gene family, CBP60g, contributes to MAMP-triggered SA accumulation. CBP60g is inducible by both pathogen and MAMP treatments. Pseudomonas syringae growth is enhanced in cbp60g mutants. Expression profiles of a cbp60g mutant after MAMP treatment are similar to those of sid2 and pad4, suggesting a defect in SA signaling. Accordingly, cbp60g mutants accumulate less SA when treated with the MAMP flg22 or a P. syringae hrcC strain that activates MAMP signaling. MAMP-induced production of reactive oxygen species and callose deposition are unaffected in cbp60g mutants. CBP60g is a calmodulin-binding protein with a calmodulin-binding domain located near the N-terminus. Calmodulin binding is dependent on Ca2+. Mutations in CBP60g that abolish calmodulin binding prevent complementation of the SA production and bacterial growth defects of cbp60g mutants, indicating that calmodulin binding is essential for the function of CBP60g in defense signaling. These studies show that CBP60g constitutes a calmodulin-dependent link between MAMP recognition and SA accumulation that is important for resistance to P. syringae. This experiment consists of three biological replicates. For each genotype, two leaves per plant were pooled from three pots to prepare total RNA.

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