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MtBZR1 plays an important role in nodule development in Medicago truncatula

ABSTRACT: MtBZR1 plays an important role in nodule development in Medicago truncatula

PROVIDER: PRJNA545836 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9179162.fastq.gz	Fastqsanger.gz
	SRR9179163.fastq.gz	Fastqsanger.gz
	SRR9179164.fastq.gz	Fastqsanger.gz
	SRR9179165.fastq.gz	Fastqsanger.gz
	SRR9179166.fastq.gz	Fastqsanger.gz

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MtBZR1 plays an important role in nodule development in Medicago truncatula

Project description:Brassinosteroid (BR) is an essential hormone in plant growth and development. BR signaling pathway has been extensively studied, in which Brassinazole resistant 1 (BZR1) functions as a key regulator. Here, we carried out a functional study of the homolog of BZR1 in Medicago truncatula, whose expression was induced in nodules upon rhizobial inoculation. We identified a loss-of-function mutant mtbzr1-1 and generated 35S:MtBZR1 transgenic lines for further analysis at the genetic level. Both the mutant and the overexpressor lines of MtBZR1 showed no obvious phenotypic changes under normal growth condition. After rhizobial inoculation, however, the shoot and root dry mass was reduced in mtbzr1-1 compared with the wild-type, caused by partially impaired nodule development. The transcriptomic analysis identified 1,319 differentially expressed genes in mtbzr1-1 compared with wild-type, many of which are involved in nodule development and secondary metabolite biosynthesis. Our results demonstrate an essential role of MtBZR1 in nodule development in M. truncatula, shedding light on the potential role of BR in legume-rhizobium symbiosis.

2022-05-28 | GSE132070 | GEO

The single-cell transcriptome program of nodule development cellular lineages in Medicago truncatula

Project description:Medicago truncatula engages in root nodule symbiosis by developing a de novo plant organ (known as nodule) in its roots in response to the infection by rhizobia. These nodules are de novo plant organs that provide an optimal environment for the rhizobia to fix nitrogen in exchange for photosynthates. The establishment of root nodule symbioses (RNS) requires the coordination of two distinct processes: bacterial infection and nodule organogenesis. In this study we used single-cell RNA-seq to investigate the first hours of the establishment of the root nodule symbiosis aiming to identify the transcriptional mechanisms governing this process.

2024-01-17 | GSE224539 | GEO

Cell- and tissue-specific transcriptome analyses of Medicago truncatula root nodules

2013-05-29 | GSE43354 | GEO

Cell- and tissue-specific transcriptome analyses of Medicago truncatula root nodules

Project description:We used laser-capture microdissection (LCM) to isolate specific cells from the Medicago truncatula nodule meristem (M), the distal infection (DIZ), the proximal infection zone (PIZ), infected cells (IC) and uninfected cells (UIC) from the fixation zone. Based on Medicago GeneChips, we identified the cell- and tissue-specific programm of gene expression in Medicago truncatula root nodules. Nodules were harvested three weeks after inoculation of Medicago truncatula (genotype Jemalong A17) plants with Sinorhizobium meliloti strain 2011. Nodules were fixed in Farmer's fixative and subsequently embedded in paraffin. 8 M-BM-5m de-paraffined sections were used to capture cells from the nodule meristem, distal infection zone, proximal infection zone, infected cells and uninfected cells from the fixation zone, using an Arcturus Pixcell II laser capture microscope. 3 biological replicates were used for each cell-/tissue type. After RNA extraction, the RNA was amplified and used for Medicago Gene Chip hybridization.

2013-05-29 | E-GEOD-43354 | biostudies-arrayexpress

Expression data of Medicago truncatula Jemalong A17 roots treated with auxin transport inhibitors

Project description:Rhizobium and allied bacteria form symbiotic nitrogen-fixing nodules on legume roots. Plant hormones appear to play a role in nodule formation. We treated Medicago truncatula roots with auxin transport inhibitors (ATIs) N-(1-naphthyl)phthalamic acid (NPA) and 2,3,5-triiodobenzoic acid (TIBA) to induce the formation of pseudonodules. We compared the transcriptional responses of M. truncatula roots treated with ATIs to roots inoculated with Sinorhizobium meliloti. The transcriptional response of M. truncatula roots 1 and 7 days after ATI treatment were opposite to roots treated with S. meliloti.

2011-03-26 | GSE27991 | GEO

MtBZR1 Plays an Important Role in Nodule Development in Medicago truncatula.

Project description:Brassinosteroid (BR) is an essential hormone in plant growth and development. The BR signaling pathway was extensively studied, in which BRASSINAZOLE RESISTANT 1 (BZR1) functions as a key regulator. Here, we carried out a functional study of the homolog of BZR1 in Medicago truncatula R108, whose expression was induced in nodules upon Sinorhizobium meliloti 1021 inoculation. We identified a loss-of-function mutant mtbzr1-1 and generated 35S:MtBZR1 transgenic lines for further analysis at the genetic level. Both the mutant and the overexpression lines of MtBZR1 showed no obvious phenotypic changes under normal growth conditions. After S. meliloti 1021 inoculation, however, the shoot and root dry mass was reduced in mtbzr1-1 compared with the wild type, caused by partially impaired nodule development. The transcriptomic analysis identified 1319 differentially expressed genes in mtbzr1-1 compared with wild type, many of which are involved in nodule development and secondary metabolite biosynthesis. Our results demonstrate the role of MtBZR1 in nodule development in M. truncatula, shedding light on the potential role of BR in legume-rhizobium symbiosis.

| S-EPMC6627309 | biostudies-literature

Processing of NODULE INCEPTION controls transition to nitrogen fixation in root nodules

Project description:To understand the role of Medicago truncatula NODULE INCEPTION (MtNIN) in nodule development, we analyzed the transcriptome of roots ectopically overexpressing NIN, nodules of weak mutant allele nin-16, and nodules of dnf1-2 mutant.

2021-11-09 | GSE178119 | GEO

NODULE INCEPTION recruits the lateral root developmental program for symbiotic nodule organogenesis

Project description:In order to better understand the commonalities and differences in lateral root and nodule development, we compared their organogenesis and correlated this with changes in gene expression. To initiate lateral roots in Medicago truncatula we turned 2-day-old seedlings 135°, before returning them to their original axis of growth, while for nodule initiation we applied droplets of Sinorhizobium meliloti on the susceptibility zone of the root.

2019-09-20 | GSE133612 | GEO

Medicago truncatula seed development under greenhouse conditions

Project description:Transcriptional profiling of seeds of Medicago truncatula during maturation. To identify genes that are regulated during seed maturation in the model legume Medicago truncatula, plants at flowering stage were grown at variable light and temperature conditions under greenhouse environment (period March-June). Seeds were then collected at different stages of development. Using the Medicago NimbleGen chip, a transcriptomic analysis was performed to follow the differential expression of genes during seed maturation.

2019-09-11 | GSE137174 | GEO

Medicago truncatula strain:A17

Project description:Comparative transcriptomics in Medicago truncatula nodule development

| PRJNA391316 | ENA