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Comparison of plant responses upon Aphanomyces euteiches infection in wild type (A17) and NFP allelic mutants

ABSTRACT: affy_aphanomyces_medicago - NFP is one of the putative Nod factor receptor and plays therefore a key role in the establishment of symbiosis. nfp allelic mutants are more susceptible to Aphanomyces euteiches (Ae), a root pathogen, than the A17 wild type (WT) line. In this study we want to compare the early plant responses, 1 day post inoculation (dpi) between WT and the nfp2 mutant, in order to identify NFP-dependent gene networks during infection.-Fifteen-day-old A17 or nfp-2 plants were grown in vitro on M medium. The entire roots were then inoculated (or not = controls) with a A. euteiches zoospores (105/ml) and harvested one day after inoculation. Three independent repeats were performed. Keywords: normal vs ems mutant comparison,near isogenic lines (hif) 12 arrays - Medicago

ORGANISM(S): Medicago truncatula

SUBMITTER: sandrine balzergue

PROVIDER: E-GEOD-20587 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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affy_infection_medicago-Comparison of plant responses upon Aphanomyces euteiches infection in wild type (A17) line and in the hap2a-1 mutant

Project description:affy_infection_medicago - affy_infection_medicago - HAP2a is a transcription factor involved in the regulation of nitrogen fixing nodule organogenesis. hap2a-1 mutant has been shown to be more resistant to Aphanomyces euteiches (Ae), a root pathogen, than the A17 wild type (WT) line. In this study we want to compare both WT and mutant plant responses, 1 and 6 days post inoculation (dpi) between WT and the hap2a-1 mutant, in order to identify HAP2a-dependent gene networks during infection. Data about non inoculated A17 control plants and infected A17 at 1 dpi have been already obtained in another experiment in which the conditions of in vitro culture of M. truncatula plants and ofA.euteiches(Ae) inoculation were exactly the same than the ones used in these experiments.-Fifteen-day-old A17 or hap2a-1 plants were grown in vitro on M medium. The entire roots were then inoculated (or not = controls) with a A. euteiches zoospores (105/ml) and harvested one or six days after inoculation. Three independent repeats were performed. 12 arrays - Medicago; normal vs disease comparison,normal vs ems mutant comparison,time course

2011-11-01 | E-GEOD-26046 | biostudies-arrayexpress

affy_med_2011_10- Comparison of plant responses upon Aphanomyces euteiches infection in wild type (A17) line and in the lyr3-1 and lyr3-2 mutants

Project description:affy_med_2011_10 - affy_med_2011_10 - LYR3 encodes a lysin motif-receptor-like kinase (LysM-RLK) that consists of an extracellular ligand-binding domain composed of three LysM domains, a single transmembrane domain and a cytoplasmic serine/threonine kinase domain. A reverse genetic approach was undertaken to study the role of this gene in the pathosystem Medicago truncatula M-bM-^@M-^S Aphanomyces euteiches (Ae). Results suggest that lyr3-1 and lyr3-2 mutants are more susceptible to the root pathogen Aphanomyces euteiches than the A17 wild type (WT) line. In this study, we want to compare the early plant responses, 3 days post inoculation (dpi), between WT and the lyr3-1 and lyr3-2 mutants, in order to identify LYR3-dependent gene networks during infection.-Fourteen days old A17, lyr3-1 or lyr3-2 plants were grown in vitro on M medium. The entire roots were then inoculated (or not = controls) with A. euteiches zoospores (105/ml) and harvested three days after inoculation. Three independent repeats were performed. 18 arrays - Medicago; normal vs mutant comparison,near isogenic lines (hif)

2014-02-28 | E-GEOD-43715 | biostudies-arrayexpress

affy_floral_rose-Study of floral initiation and recurrent blooming in rose

Project description:affy_floralangers_rose - affy_floral_rose - - Which genes are induced during floral initiation? - Are the genes involved in floral initiation identical between our 3 genotypes? - Which genes are involved in the control of recurrent blooming in rose? - Which genes are diferentially expressed between buds that will become floral and buds that will remain vegetative?-This project aims to find in rose genes involved in flowering control (floral initiation and recurrent flowering). First, the floral initiation will be observed in 3 genotypes. Then we will check if same genes are regulated within genotypes for this process. Concerning recurrent blooming, we will compare flower bud versus vegetative buds in non-recurrent conditions and finally bud from non-recurrent and recurrent genotypes. Keywords: time course 26 arrays - rose

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affy_med_2012_03-Characterization of new phytostimulatrices molecules for the improvement of plants products and crop resistance to diseases

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2013-12-01 | E-GEOD-43839 | biostudies-arrayexpress

Molecular mechanisms of partial resistance to Aphanomyces euteiches in Medicago truncatula (affy_molecularmechanism_medicago)

Project description:affy_molecularmechanism_medicago - affy_molecularmechanism_medicago - -Aphanomyces euteiches (Ae), a soilborne oomycete, is the causal agent of pea root rot, a major disease on various cultivated legume species. To gain insight into the mechanism underlying partial resistance to this pathogen, a pathosystem has been developed using the model legume Medicago truncatula (Mt). Two Mt accessions A17 and F83005.5 have been shown to display differential responses upon infection with Ae (partially resistance and susceptibility, respectively). Genetic analyses using a RIL population derived from a cross between those two lines lead to the identification of, prAe1, a major QTL involved in the observed partial resistance. Near isogenic lines (NIL) 5B2 and 5D2 whose genomes are identical except at the prAe1 locus (resistant alleles for 5B2, susceptible alleles for 5D2) have been generated, and the same differential response toward Ae has been found. The aim of this experiment is to analyse and compare 5B2 and 5D2 transcriptomes at 1 and 6 days after Ae inoculation to identify gene networks that are regulated in a prAe1 dependent manner.--Fifteen-day-old 5B2 or 5D2 plants were grown in vitro on M medium. The entire roots were then inoculated (or not = 0dpi) with a A. euteiches zoospores (75000zsp/ml) and harvested one or six days after inoculation. Three independent repeats were performed. 18 arrays - Medicago; resistance vs susceptibility comparison,time course,treated vs untreated comparison

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Metabolism-based resistance to herbicides in black-grass

Project description:Resistance to herbicides in weeds can be due to alteration(s) in the gene encoding the herbicide target site, or to herbicide degradation via a deviation in plant general metabolism. If target-site-based resistance is easy to study, the multigenic control of metabolism-based resistance renders it much more complex to study. Metabolism-based resistance to herbicides represents the major part of herbicide resistance in black-grass. Its most likely basis is an overexpression of genes encoding enzymes degrading herbicides. We thus seek to identify such overexpressed genes by comparing the transcriptomes of resistant and sensitive black-grass individuals belonging to an F2 line segregating for two resistance genes. Given there are no genomic tools developed for black-grass, this approach will use heterologous hybridisation onto a wheat Affymetrix microarray. Comparison using heterologous hybridisation onto a wheat whole-genome microarray of transcriptome of three pools of black-grass plants obtained 2h30 after herbicide spraying at field rate. The three pools correspond to: Â· Sensitive plants (killed by herbicide). Â· Moderately resistant plants (growth impaired by herbicide but plants still alive) Â· Resistant plants (growth unimpaired by herbicide) 6 arrays - wheat

2010-05-27 | E-GEOD-15864 | biostudies-arrayexpress

Transcriptom analysis of the interaction Medicago truncatula – Ralstonia solanacearum

Project description:affy_ralstonia_medicago - Ralstonia solanacearum is the causal agent of the devastating bacterial wilt disease. Its infection process was studied with an in vitro inoculation procedure on intact roots of Medicago truncatula. The pathosystem involved susceptible A17 and resistant F83005.5 M truncatula lines infected with the pathogenic strain GMI1000. The mutant A17 line, Sickle, which showed a resistant phenotype was also part of the experiment. To identify host signaling pathway triggered by R. solanacearum infection with a focus on the involvment of ethylene, we used the Medicago Affymetrix array to monitore the expression profiles and the molecular process associated with initial symptoms development (12hpi) and colonization (72hpi). In order to maximize chances to observe differential gene expression, RNA samples were extracted from the root infection zone (root tips) -Three Medicago truncatula lines, A17, F83005.5 and sickle were inoculated with GMI1000 Ralstonai solanacearum strain (107 cfu/ml). RNA were extracted from root extremities (1 cm above the root tip) at time 0, 12h and 72h post inoculation. Three biological repeats were conducted normal vs disease comparison, time course, 27 arrays - Medicago

2011-09-09 | E-GEOD-18473 | biostudies-arrayexpress

affy_infection_medicago-Comparison of plant responses upon Aphanomyces euteiches infection in wild type (A17) line and in the Mtnf-ya1-1 mutant

Project description:affy_infection_medicago - affy_infection_medicago - MtNF-YA1 is a transcription factor involved in the regulation of nitrogen fixing nodule organogenesis. Mtnf-ya1-1 mutant has been shown to be more resistant to Aphanomyces euteiches (Ae), a root pathogen, than the A17 wild type (WT) line. In this study we want to compare both WT and mutant plant responses, 1 and 6 days post inoculation (dpi) between WT and the Mtnf-ya1-1 mutant, in order to identify MtNF-YA1-dependent gene networks during infection. Data about non inoculated A17 control plants and infected A17 at 1 dpi have been already obtained in another experiment in which the conditions of in vitro culture of M. truncatula plants and ofA.euteiches(Ae) inoculation were exactly the same than the ones used in these experiments.-Fifteen-day-old A17 or Mtnf-ya1-1 plants were grown in vitro on M medium. The entire roots were then inoculated (or not = controls) with a A. euteiches zoospores (105/ml) and harvested one or six days after inoculation. Three independent repeats were performed.

2011-11-01 | GSE26046 | GEO

affy_med_2011_10- Comparison of plant responses upon Aphanomyces euteiches infection in wild type (A17) line and in the lyr3-1 and lyr3-2 mutants

Project description:affy_med_2011_10 - affy_med_2011_10 - LYR3 encodes a lysin motif-receptor-like kinase (LysM-RLK) that consists of an extracellular ligand-binding domain composed of three LysM domains, a single transmembrane domain and a cytoplasmic serine/threonine kinase domain. A reverse genetic approach was undertaken to study the role of this gene in the pathosystem Medicago truncatula – Aphanomyces euteiches (Ae). Results suggest that lyr3-1 and lyr3-2 mutants are more susceptible to the root pathogen Aphanomyces euteiches than the A17 wild type (WT) line. In this study, we want to compare the early plant responses, 3 days post inoculation (dpi), between WT and the lyr3-1 and lyr3-2 mutants, in order to identify LYR3-dependent gene networks during infection.-Fourteen days old A17, lyr3-1 or lyr3-2 plants were grown in vitro on M medium. The entire roots were then inoculated (or not = controls) with A. euteiches zoospores (105/ml) and harvested three days after inoculation. Three independent repeats were performed.

2014-02-28 | GSE43715 | GEO

Comparison of plant responses upon Aphanomyces euteiches infection in wild type (A17) and NFP allelic mutants

Project description:affy_aphanomyces_medicago - NFP is one of the putative Nod factor receptor and plays therefore a key role in the establishment of symbiosis. nfp allelic mutants are more susceptible to Aphanomyces euteiches (Ae), a root pathogen, than the A17 wild type (WT) line. In this study we want to compare the early plant responses, 1 day post inoculation (dpi) between WT and the nfp2 mutant, in order to identify NFP-dependent gene networks during infection.-Fifteen-day-old A17 or nfp-2 plants were grown in vitro on M medium. The entire roots were then inoculated (or not = controls) with a A. euteiches zoospores (105/ml) and harvested one day after inoculation. Three independent repeats were performed. Keywords: normal vs ems mutant comparison,near isogenic lines (hif)

2011-09-02 | GSE20587 | GEO

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