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Transcriptome analysis of maize Gibberella stalk rot

ABSTRACT: Transcriptome analysis of maize Gibberella stalk rot

PROVIDER: PRJNA721468 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14224146_1.fastq.gz	Fastqsanger.gz
	SRR14224146_2.fastq.gz	Fastqsanger.gz
	SRR14224147_1.fastq.gz	Fastqsanger.gz
	SRR14224147_2.fastq.gz	Fastqsanger.gz
	SRR14224148_1.fastq.gz	Fastqsanger.gz

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Gene expression of F.graminearum during maize stalk infection

Project description:Fusarium graminearum can infect maize stalk causing Gibberella stalk rot. We want to know the whole genome wide gene profiling when infecting maize stalk.

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Transcriptome analysis of maize Gibberella stalk rot

Project description:Gibberella stalk rot (GSR) caused by Fusarium graminearum is one of the most devastating diseases causing significant yield loss of maize, and GSR resistance is a quantitative trait controlled by multiple genes. Although a few QTLs/resistance genes have been identified, the molecular mechanisms underlying GSR resistance remain largely unexplored. To identify potential resistance genes and to better understand the molecular mechanism of GSR resistance, a transcriptomic was conducted using two inbred lines with contrast GSR resistance, K09 (resistant) and A08 (susceptible) upon infection with F. graminearum. While substantial number of differentially expressed genes (DEGs) associated with various defense-related signaling pathways were identified between two lines, multiple hub genes likely associated with GSR resistance were pinpointed using Weighted Gene Correlation Network Analysis (WGCNA). ZmHIR3 showed strong correlation with multiple key genes.

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Project description:Fusarium graminearum can infect maize stalk causing Gibberella stalk rot. We want to know the whole genome wide gene profiling when infecting maize stalk. Using lasr capture microdisecction, we captured 8 time points infecting hyphae samples for maize stalk and after two-round amplification, we hybrid the aRNA to Affymetrix array.

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Project description:Fusarium graminearum is the causal agent of Gibberella stalk rot in maize stem, resulting maize lodging, yield, quality, and mechanical harvesting capacity. To date, little is known about the maize stem defense mechanism in response to invasion of F. graminearum. This study represents a global proteomic approach to document the infection by F. graminearum. A total of 1,894 differentially accumulated proteins (DEPs) were identified after inoculation of maize plants with F. graminearum. Functional categorization analysis indicated that proteins involved in plant-pathogen interaction were inducible at early stages of infection. We also found that the expression of proteins involved in phenylpropanoid, flavonoid, and terpenoid biosynthesis were up-regulated in response to F. graminearum infection, which may reflect a particular contribution of secondary metabolism in protection against the fungal attack in maize stem. Together, our results indicated that the defense response of maize stem to F. graminearum infection was multifaceted and involved the induction of proteins from various innate immunity related pathways, which had directive significance for molecular genetic breeding of maize disease-resistant varieties.

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Project description:This experiment is to assess the changes of maize genes expression in response to Fusarium graminearum stains wild-type PH-1 and Δcfem1 mutant. F. graminearum is the major casual fungal pathogen of Gibberella stalk rot on maize.

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Transcriptome and oxylipin profiling joint analysis reveals the opposite roles of 9-oxylipins and jasmonic acid in maize resistance to Gibberella stalk rot

Project description:Gibberella stalk rot (GSR) caused by Fusarium graminearum is one of the devastating diseases causing significant losses to maize production worldwide. Although plant oxylipins have been widely reported as potent signals to activate diverse biotic stress responses, the roles of distinct oxylipin pathway branches initiated by either 9- or 13-lipoxygenases (LOXs) in defense against GSR remain unexplored. In this study, the functional analysis showed that disruption of ZmLOX5, a maize 9-LOX gene, resulted in increased susceptibility to GSR. To identify the key genes and metabolites associated with GSR resistance, we profiled transcriptome and oxylipins in the lox5 mutant and near-isogenic wild type. The results showed that JA biosynthetic pathway genes are highly up-regulated, whereas multiple 9-LOX pathway genes down-regulated in lox5-3 mutant in response to F. graminearum infection. Furthermore, oxylipin profiling of the mutant and corresponding wild type, B73, as well as a more resistant line, W438, uncovered significantly higher contents of JA-isoleucine (JA-Ile) and other jasmonates but relatively lower levels of 9-oxylipins in lox5-3 upon infection. By contrast, resistant line W438 and B73 displayed relatively lower levels of JAs, yet considerable increase of 9-oxylipins. Taken together, these results clearly indicated that the signaling pathways of 9-oxylipins and JAs antagonize each other, and that while ZmLOX5-produced 9-oxylipins contribute to resistance, JAs are likely to function as negative regulator in maize defense against GSR.

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Expression profile of maize´s stalk challenged with the corn borer Sesamia nonagrioides

Project description:Stalk borers are major pests for some of the most important crops in the world, such as maize or rice. Plant defense mechanisms against these herbivores have been poorly investigated. The maize´s stalk responds to insect feeding activating defense genes including hormone biosynthetic-related or proteinase inhibitor transcripts. The most outstanding conclusion is that cells in the maize´s stalk undergo cell wall fortification after corn borer tunneling. We performed a gene expression profiling to identify those genes differentially expressed in maize after infestation with the corn borer S. nonagrioides. Four genetically unrelated maize inbred lines (EP39, EP42, CM151 and PB130) were infested at VT (tasseling) developmental stage with a mass of approximately 40 eggs of S. nonagrioides laid on the sheath of the main ear. Another four biological replicates per genotype were used as control. Samples for RNA extraction were harvested fifteen days after infestation.

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