Transcription profiling of Medicago truncatula after innoculation with Phymatotrichopsis omnivora
ABSTRACT: To identify host signaling pathways triggered by P. omnivora infection, we used microarrays to monitor the expression profiles and the molecular process associated with initial entry at 3 days post-inoculation and colonization at 5 days post-inoculation
Project description:This experiment was designed to study the interactions between Medicago truncatula and the charcoal rot pathogen Macrophomina phaeolina. Two-week-old plants grown in Magenta boxes supplied with 1/2 MS salt and 1% sucrose were inoculated with M. phaseolina covered wheat seeds, and roots were harvested at 24, 36 and 48 hours after inoculation. Control plants were mock inoculated with a sterile wheat seed, and roots were harvest 24 hours later. Pooled RNAs were used in the array experiment using Affymetrix GeneChip(r) Medicago Genome Array.
Project description:cortical cell of non-mycorrhizal roots (cor), arbuscule-containing cells (arb) and non-arbuscule-containing cells (nac) of M. truncatula roots colonized with Glomus intraradices were collected by laser capture microdissection (LCM) and used for RNA extraction and Medicago microarray hybridisation
Project description:Columbia (Col) seeds were sown on half-strength Murashige and Skoog (MS) medium, supplemented with 1% sucrose and 0.8% agar and grown vertically in culture room conditions. The 5-d-old homogenous seedlings were washed five times with sterile water and lastly with liquid half strength MS medium without sugar to remove residual exogenous sugar. In order to deplete internal sugars seedlings were grown in sugar free liquid half strength MS medium for 24 h in dark. Thereafter, the seedlings were treated with half-strength MS medium containing 0% G, 0% G + 1 uM BAP, 3% G, and 3% G + 1 uM BAP for 3 h in dark. RNA was extracted and microarray analysis was performed. Please note: G stands for glucose and BAP stands for 6-Benzylaminopurine (cytokinin)
Project description:We analyze the effect of a double deletion mutant for alternative-splicing regulators nsra and nsrb (Nuclear Speckle RNA binding proteins), on the Arabidopsis thaliana transcriptome. RNA-seq experiments (polyA+ RNA) in triplicates for each condition WT and nsrab mutants.
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.
Project description:AtbZIP60 is one of the transcription factors involved in the endoplasmic reticulum (ER) stress response in Arabidopsis. To identify genes under the control of AtbZIP60 during ER stress, we compared the genome-wide expression profiles of wild-type and atbzip60 mutant plants in response to the ER stress inducer tunicamycin.
Project description: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
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.
Project description:We analyzed global transcriptional changes in both shoots and roots of root-flooded Arabidopsis seedlings by microarrays. We also interpreted the significance of the systemic communication between roots and shoots by functional classification of affected genes. We performed genetic analysis with an ethylene signaling mutant, ein2-5, to correlate systemic flooding responses with ethylene signaling. We identified a class of genes that were up- or downregulated in shoots, but not affected in roots, under hypoxic conditions. A comprehensive managing program of carbohydrate metabolism was observed, providing an example of how systemic communications might facilitate the survival of plants under flooding. A proportion of long-distance hypoxic regulation was altered in ein2-5. Time course experiments (0.5, 1, 3, 6, and 12h for Columbia; 0.5, 3, and 6h for ein2-5). Tissues from root-flooded seedlings vs. Tissues from un-flooded seedlings. Biological replicates: 4 replicates for each time point, independently grown, treated, and harvested. One replicate per array. 2 of 4 replicates are dye-swapped.