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Arachis hypogaea

ABSTRACT: Transcriptome and proteome analysis of resistant peanut pre-harvest seeds in response to Aspergillus flavus

PROVIDER: PRJNA398665 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5942520_1.fastq.gz	Fastqsanger.gz
	SRR5942520_2.fastq.gz	Fastqsanger.gz
	SRR5942521_1.fastq.gz	Fastqsanger.gz
	SRR5942521_2.fastq.gz	Fastqsanger.gz
	SRR5942522_1.fastq.gz	Fastqsanger.gz

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Transcriptome and proteome analysis of resistant peanut pre-harvest seeds in response to Aspergillus flavus

Project description:In this study, we used RNA-seq to obtain and compare transcriptomic profiles of a resistant genotype J11 in pre-harvest seeds, with A. flavus inoculation at the whole-genome level. The TMT method was also implemented to help further understand the molecular mechanism of peanut resistance to A. flavus invasion at proteome level. Meanwhile, we conducted a thorough research on a chitinase and a NBS-LRR gene, which were found in our data. This study is our first step towards a comprehensive genome-scale platform for developing Aspergillus resistant peanut cultivars through genetic engineering.

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Deciphering the basis of resistance and susceptibility to Aspergillus flavus infection and aflatoxin in peanut (Arachis hypogaea L.) using comparative proteomics

Project description:Aflatoxin contamination caused by Aspergillus flavus in peanut is a serious constraint for food safety and human health. However, molecular mechanism/s underlying the defense response is poorly understood. A comparative proteomic analysis was carried out between two contrasting peanut genotypes, JL24 (WT-susceptible) and a near-isogenic transgenic event (OE-Def) in the same background expressing defensin gene (resistant) with different time points, To understand the proteome changes in OE-Def and WT control lines, a label-free quantitative proteomics analysis was performed at 0, 24, 40, 56 and 72 h after A. flavus inoculation using UPLC-ESI-MS/MS. Several resistance proteins in the secondary metabolic pathways related to phenylpropanoids, flavonoids, and fatty acid biosynthesis were strongly induced in the resistant genotype.

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Project description:To identify peanut Aspergillus-interactive and Aspergillus-resistance genes, we carried out a large scale peanut Expressed Sequence Tag (EST) project followed by a peanut microarray study. For expression profiling, resistant and susceptible peanut cultivars were infected with a mixture of Aspergillus flavus and parasiticus spores. Microarray analysis identified 65 and 1 genes in resistant (C20) and susceptible (TF) cultivars, respectively, that were up-regulated in response to Aspergillus infection. In addition we identified 40 putative Aspergillus-resistance genes that were constitutively up-expressed in the resistant cultivar in comparison to the susceptible cultivar. Some of these genes were homologous to peanut, corn, and soybean genes previously shown to confer resistance to fungal infection. These results provide a comprehensive genome-scale platform for future studies focused on developing Aspergillus-resistant peanut cultivars through conventional breeding, marker-assisted breeding, or biotechnological methods by gene manipulation. Four samples were analyzed with four hybs. Two samples were obtained from resistant (C20) and and susceptible (TF) cultivars. Two factors were varied in the experimental design: (i) peanut cultivars (resistant (GT-C20) and susceptible (TF)) and (ii) Aspergillus exposure. A combination of these factors produced four hybridizations as follows: (1) C20Y vs. TFY (GT-C20 infected vs. TF infected) (2) C20Y vs. C20N (GT-C20 infected vs. not infected) (3) TFY vs. TFN (TF infected vs. not infected) (4) C20N vs. TFN (GT-C20 not infected vs. TF not infected)

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