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Medicago truncatula wild-type and mutant plantlet roots treated with symbiotic lipochitooligosaccharides

ABSTRACT: This SuperSeries is composed of the following subset Series: GSE33636: Gene expression data from Medicago truncatula plantlet roots treated with symbiotic lipochitooligosaccharides (LCOs). GSE33637: Gene expression data from Medicago truncatula mutant plantlet roots treated with Myc-LCOs. Refer to individual Series

ORGANISM(S): Medicago truncatula

SUBMITTER: Helge KM-CM-<ster

PROVIDER: E-GEOD-33638 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Transcriptional responses toward diffusible signals from symbiotic microbes reveal MtNFP- and MtDMI3-dependent reprogramming of host gene expression by arbuscular mycorrhizal fungal lipochitooligosaccharides.

Czaja Lisa F LF Hogekamp Claudia C Lamm Patrick P Maillet Fabienne F Martinez Eduardo Andres EA Samain Eric E Dénarié Jean J Küster Helge H Hohnjec Natalija N

Plant physiology 20120531 4

The formation of root nodules and arbuscular mycorrhizal (AM) roots is controlled by a common signaling pathway including the calcium/calmodulin-dependent kinase Doesn't Make Infection3 (DMI3). While nodule initiation by lipochitooligosaccharide (LCO) Nod factors is well characterized, diffusible AM fungal signals were only recently identified as sulfated and nonsulfated LCOs. Irrespective of different outcomes, the perception of symbiotic LCOs in Medicago truncatula is mediated by the LysM rece ...[more]

PMID: 22652128

Similar Datasets

Gene expression data from Medicago truncatula plantlet roots treated with symbiotic lipochitooligosaccharides (LCOs).

Project description:Legumes interact with soil microbes, leading to the development of nitrogen-fixing root nodules and arbuscular mycorrhizal (AM) roots. While nodule initiation by diffusible lipochitooligosaccharide (LCO) Nod-factors of bacterial origin (Nod-LCOs) is well characterized, diffusible AM fungal signals were only recently identified as sulphated and non-sulphated LCOs (sMyc-LCOs and nsMyc-LCOs). Applying Myc-LCOs in parallel to Nod-LCOs, we used GeneChips to detail the global programme of gene expression in response to the external application of symbiotic LCOs. To harvest tissues for transcriptome profiling, three biological replicates consisting of 20 plantlets per treatment were selected. After 6 h of incubation in the climate chamber, 10 plantlets per batch were removed from the treatment (Myc-LCOs or Nod-LCOs) or control solutions and harvested, while the other 10 remained in the respective solutions for a total of 24 h. During harvest, one mm of the root tip of each plantlet was removed and discarded. The remaining 2 to 2.5 cm of the distal root region were cut off and directly frozen in liquid nitrogen.

2012-05-30 | E-GEOD-33636 | biostudies-arrayexpress

Gene expression data from Medicago truncatula mutant plantlet roots treated with Myc-LCOs.

Project description:Legumes interact with soil fungi, leading to the development of arbuscular mycorrhizal (AM) roots. Diffusible AM fungal signals were identified as sulphated and non-sulphated LCOs (sMyc-LCOs and nsMyc-LCOs). Applying Myc-LCOs on roots of symbiotic mutants, we used GeneChips to detail the global programme of gene expression in these mutants in response to the external application of Myc-LCOs. To harvest tissues for transcriptome profiling, three biological replicates consisting of 10 plantlets per treatment were selected. After 6 h of incubation in the climate chamber, 10 plantlets per batch were removed from the treatment (Myc-LCOs) or control solutions and harvested. During harvest, one mm of the root tip of each plantlet was removed and discarded. The remaining 2 to 2.5 cm of the distal root region were cut off and directly frozen in liquid nitrogen.

2012-05-30 | E-GEOD-33637 | biostudies-arrayexpress

Lotus japonicus-Alkaline

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.

2014-03-25 | E-MTAB-2418 | biostudies-arrayexpress

Transcription profiling of barley leaves after boron reveals a late response to boron toxicity

Project description:Barley1 GeneChip was used to investigate transcriptome changes associated with boron (B) toxicity in a sensitive barley cultivar (Hordeum vulgare L. cv. Hamidiye). Eight day old aseptically grown seedlings were subjected to 5 or 10 mM boric acid (B(OH)3) treatments for 5 days and expression profiles were determined with DNA microarrays using total RNA from leaf tissues. Surface sterilized seeds were aseptically germinated and grown on half strength Hoaglandâs solution (Hoagland and Arnon, 1950) (pH 5.8) solidified with PhytagelÂ® for 8 days at 23Â±2ÂºC with 16 h light (400 Âµmol mâ2 sâ1) and 8 h dark photo-cycle with 70% relative humidity. Seedlings were transferred to sterile hydroponic cultures for B treatment, which was applied immediately after transfer as half strength Hoaglandâs solution containing either 5 mM B(OH)3 (5B) or 10 mM B(OH)3 (10B) for another 5 days under the same physical conditions. Control (C) groups were transferred to half strength Hoaglandâs solution without extra B(OH)3. ****[PLEXdb(http://www.plexdb.org) has submitted this series at GEO on behalf of the original contributor, Mehmet Tufan OZ. The equivalent experiment is BB63 at PLEXdb.] Experiment Overall Design: treated or untreated: Control (C)(3-replications); treated or untreated: 5 mM B(OH)3 treatment (5B)(3-replications); treated or untreated: 10 mM B(OH)3 treatment (10B)(3-replications)

2009-01-31 | E-GEOD-14521 | biostudies-arrayexpress

A triple-HLH/bHLH Cascade Controls Cell Elongation Downstream of Multiple Hormonal and Environmental Signaling Pathways

Project description:The environmental and endogenous signals, light, temperature, brassinosteroid (BR), and gibberellin (GA), regulate cell elongation largely by controlling the expression of the PRE family helix-Loop-helix (HLH) factors, which promote cell elongation by interacting antagonistically with another HLH factor, IBH1. But the molecular mechanism by which PREs and IBH1 regulate gene expression has remained unknown. Here we show that IBH1 interacts with and inhibits a DNA-binding bHLH protein HBI1. Overexpression of HBI1 increased hypocotyl and petiole elongation, whereas dominant inactivation of HBI1 and its homologs caused a dwarf phenotype, indicating that HBI1 is a positive regulator of cell elongation. In vitro and in vivo experiments showed that HBI1 directly bound to the promoters and activated two EXPANSIN genes encoding cell wall-loosening enzymes; HBI1's DNA-binding and transcriptional activities were inhibited by IBH1, but the inhibitory effects of IBH1 were abolished by PRE1. The results indicate that PREs activate the DNA-binding bHLH factor HBI1 by sequestering its inhibitor IBH1. Altering each of the three factors affected plant sensitivities to BR, GA, temperature, and light. Our study demonstrates that PREs, IBH1 and HBI1 form a chain of antagonistic switches that controls cell elongation downstream of multiple external and endogenous signals. Compare the transcriptome of IBH1 and PRE1

2015-01-01 | E-GEOD-41766 | biostudies-arrayexpress

Identification of WRKY22 direct targets under submergence in Arabidopsis with ChIP

Project description:To identify direct targets of WRKY22, we created a transgenic Arabidopsis line that expresses a c-myc epitope-tagged WRKY22 and used ChIP followed by microarray hybridization (ChIP-chip) to screen for candidates and validate the in vivo protein-DNA interactions with ChIP followed by quantitative PCR (ChIP-Q-PCR). The WRKY22 and c-myc epitope tag fusion construct was generated and transformed into wrky22-ko2 plants. The resulting transgenic lines should have better ChIP efficiency than the wild-type background, due to the reduced competition for WRKY22 binding sites from endogenous WRKY22. ChIP-enriched DNA fragments were identified using criteria of a window of +300 to M-oM-<M-1200 of a gene for a promoter, a width of 4 probes or more, and a false discovery rate (FDR) < 0.1. The ChIP-chip experiments were repeated six times, i.e., six biological replicas. Candidates were defined by the presence of the promoter in three out of six biological replicas. Candidates were then classified based on their hypoxic responsiveness with a positive response defined as gene expression levels exhibiting > 2 or < 0.5-fold induction in any time point under submergence treatments in expression array data. Comparison of c-myc tagged WRKY22 transgenic plants vs wild-type (Columbia) plants. Both materials were submergence treated for 3 hours.

2013-07-03 | E-GEOD-40138 | biostudies-arrayexpress

The small RNA diversity from Medicago truncatula roots under biotic interactions evidences the environmental plasticity of the miRNAome

Project description:Plants show a remarkable plasticity to adapt their root architecture to biotic and abiotic constraints of the soil environment. Although some of these modifications are fine-tuned by miRNAs, there are still shadow zones in these regulations. In the model legume Medicago truncatula, we analyzed the small RNA (smRNA) transcriptome of roots submitted to symbiotic and pathogenic interactions. Mapping on the genome and prediction of pre-miRNA hairpins allowed the identification of 416 candidates. Out of them, we found known and novel variants of 77 miRNA families, already reported in miRBase. In addition, thanks stringent criteria of miRNA prediction, 53 mtr-miRNAs were discovered, including 27 putative miRtrons. Exploring polymorphism in 26 M. truncatula ecotypes, higher polymorphism was observed in conserved rather than legume-specific miRNA genes. An average of 19 targets, mainly involved in environmental responses and signaling, was predicted per novel miRNA. In addition, taking advantage of our large number of smRNA libraries, we identified sets of miRNAs responsive to root pathogens or to symbiotic interactions and the related Nod and myc-LCO signals. 23 libraries of small RNA (smRNA) of roots submitted to symbiotic and pathogenic interactions.

2014-08-15 | E-GEOD-49226 | biostudies-arrayexpress

Transcription profiling of barley roots during adaptation to abiotic stress conditions

Project description:Changes in gene expression during adaptation to abiotic stress conditions in the barley roots.

2005-08-01 | E-MEXP-301 | biostudies-arrayexpress

Transcription profiling of soybean leaf response to foliar spray of lipo-chitooligosaccharide (Nod factor)

Project description:Currently unpublished data suggested that the foliar application of the Bradyrhizobium japonicum Nod factor induced changes in hormone level and enzyme activity in soybean cv. OAC Bayfield. This study was designed to examine any possible differences in gene expression that occur as a result of the foliar treatment of Nod factor. The data herein are gene expression data of that experiment, from the sprayed, first trifoliolate leaf of each plant, 48 h after treatment. Experiment Overall Design: This experimental design was a Completely Randomized Design (CRD), comparing 1 treatment (first trifoliolate leaf sprayed with 10^-7M LCO/Nod factor and 0.02% Tween 20) against a mock-treated control (first trifoliolate leaf sprayed with dH2O and 0.02% Tween 20). There are 3 replicates per treatment type, with a total of 6 samples for this experiment.

2008-06-16 | E-GEOD-9730 | biostudies-arrayexpress

The RING-containing protein, JMJ24 mono-ubiquitinates RDR2 to coordinate histone methylation and DNA methylation in Arabidopsis.

Project description:JMJ24 is a RING motif containing Jumonji protein, whose E3 ligase activity is essential for communication between histone methylation and DNA methylation.In Arabidopsis JMJ24 is higly expressed in mature pollen. JMJ24 interacted with RDR2 and a single C4HC3 RING motif enabled JMJ24 to mono-ubiquitinate RDR2 for stabilization. RDR2 acted downsteam of JMJ24 for DNA methylation and local silencing. Here we performed tiling-array-based transcriptome profiling using mature pollen collected from WT and jmj24-1 and found that hundreds of loci encoding transposon elements, noncoding RNAs and protein-coding genes are regulated by JMJ24. WT vs. jmj24-1

2011-12-01 | E-GEOD-29708 | biostudies-arrayexpress

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