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Ectopic expression of NAC094 induces premature nodule senescence in Lotus japonicus.

ABSTRACT: Ectopic expression of NAC094 induces premature nodule senescence in Lotus japonicus.

PROVIDER: PRJNA810029 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18128019_1.fastq.gz	Fastqsanger.gz
	SRR18128019_2.fastq.gz	Fastqsanger.gz
	SRR18128020_1.fastq.gz	Fastqsanger.gz
	SRR18128020_2.fastq.gz	Fastqsanger.gz
	SRR18128021_1.fastq.gz	Fastqsanger.gz

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Ectopic expression of NAC094 induces premature nodule senescence in Lotus japonicus.

Project description:To investigate the function of NAC094 in vivo, we overexpressed NAC094 in the infected cells of nodules using an L. japonicus Lb2 expression cassette. To this end, we used a GUS overexpression construct as control and analysed stably transformed plants to detect symbiotic phenotypes. Results show that overexpression of NAC094 causes premature senescence of nodules. To identify the mechanism by which NAC094 regulates nodule senescence, we performed a transcriptome profiling analysis of nodules at 3 wpi. Around 13,850 differentially expressed genes (DEGs) were identified by comparing NAC-OE with control nodules (Log2FC > 1, FDR < 0.05). Of these, 7,516 were up-regulated (NAC-OE-UP) and 6,334 were down-regulated (NAC-OE-DOWN).

2023-03-23 | GSE197361 | GEO

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Project description:RNA-seq analysis was performed to know the expression profiles of Lotus japonicus genes during nodule development and nitrogen fixation.

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Transcription profiling of Lotus japonicus major organ systems including nodule and seed development

Project description:Lotus japonicus is a perennial legume with a small diploid genome that has been adopted as a model species for legume genetics and genomics. With the genome sequence as a backdrop (Sato et al. 2008), we have generated a gene expression atlas that provides a global view of gene expression in all major organ systems of this species, including nodule and seed development.

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Constitutive over-expression of LjMyb14 in Lotus japonicus.

Project description:To identify the regulatory targets of the R2R3-Myb transcription factor, LjMyb14, the gene was constitutively over-expressed in Lotus japonicus under the Lotus ubiquitin promoter. The gene expression levels of three biological replicates of the Lotus japonicus (MG20) were averaged and compared to the the gene expression levels of three independent lines of Lotus japonicus japonicus constituitively over expressing LjMyb14 using the Lotus ubiquitin promoter.

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Cell-type specific transcriptome analysis in nodules of Lotus japonicus

Project description:Legume plants can establish symbiotic nitrogen fixation (SNF) with rhizobia mostly in root nodules, where rhizobia-infected cells are accompanied with uninfected cells in a mosaic pattern. Inside the mature nodules of legume, carbon and nitrogen nutrients between host plant cells and their resident bacteria are actively exchanged. To elucidate the metabolite dynamics relevant for SNF in nodules, three cell-types from nodule tissues of a model legume, Lotus japonicus, were isolated using laser microdissesction, and transcriptome analysis was done by an oligoarray with 60-mer length representing 21,495 genes. In our cell-type-specific profiling, many genes were identified as being expressed in nodules with spatial-specific manners. Among them, genes coding for metabolic enzymes were classified according to their function, and detailed data analysis figured out that secondary metabolic pathway was highly activated in nodule cortex. In particular, a number of metabolic genes for phenyl propanoid pathway were found as highly expressed genes accompanied with those encoding putative transporters of secondary metabolites. These data suggest the involvement of novel physiological function of phenylpropanoids in SNF. Gene expression in three different cell-types of Lotus japonicus nodule was measured. Three independent experiments were performed at each cell-types.

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Project description:Lotus japonicus is a model legume broadly used to study transcriptome regulation under different stress conditions and microorganism interaction. Understanding how this model plant respond gainst alkaline stress will certainly help to develop more tolerant cultivars in economically important Lotus species as well as in other legumes. In order to uncover the most important response mechanisms activated during alkaline stress, we explored by microarray analysis the transcriptome regulation occurring in the phenotypically contrasting ecotypes MG-20 and Gifu B-129 of L. japonicus after 21 days of alkaline stress.

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