Hybrid_Poplar_H11-11_Leaves_Local_Stress_Response_DataSet2
Ontology highlight
ABSTRACT:
ORGANISM(S): Populus Populus trichocarpa x Populus deltoides
PROVIDER: GSE14039 | GEO | 2008/12/31
SECONDARY ACCESSION(S): PRJNA114517
REPOSITORIES: GEO
Similar Datasets
Project description:We investigated the transcriptional response of hybrid poplar (Populus trichocarpa x deltoides) leaves to a variety of stress treatments (insect feeding by Malacosoma disstria larvae, mechanical wounding, wounding plus the application of insect oral secretions, and methyl jasmonate spray) over a 24 hour time course. Experiments were conducted using clonal trees under greenhouse conditions at the University of British Columbia. We used the 15.5K poplar cDNA microarray platform previously described by Ralph et al. (Molecular Ecology 2006, 15:1275-1297). Differentially expressed genes were determined using three criteria: fold-change between treated and untreated control leaves > 1.5-fold, P value < 0.05 and Q value < 0.05. This study identified > 1,000 differentially expressed genes in response to insect feeding and/or treatments that mimic insect feeding damage.
2008-12-31 | GSE14081 | GEO
Project description:We investigated the transcriptional response of hybrid poplar (Populus trichocarpa x deltoides) leaves to methyl jasmonate treatment over a 24 hour time course. Experiments were conducted using clonal trees under greenhouse conditions at the University of British Columbia. We used the 15.5K poplar cDNA microarray platform previously described by Ralph et al. (Molecular Ecology 2006, 15:1275-1297). Differentially expressed genes were determined using three criteria: fold-change between methyl jasmonate-treated and tween-treated control leaves > 1.5-fold, P value < 0.05 and Q value < 0.05. This study identified > 1,000 differentially expressed genes in response to methyl jasmonate treatment. A factorial hybridization design was chosen to assess gene expression between tween-treated control leaves, and leaves subjected to methyl jasmonate treatment. For each tree, all but the lowest five mature leaves were covered with a light-weight plastic bag and then sprayed with either methyl jasmonate or tween, the solvent control. Leaves were harvested 2, 6 or 24 hours after the initiation of each treatment and total RNA was individually isolated from each tree. For each treatment and time point, equal amounts of total RNA were combined from each of the five biological replicate trees prior to cDNA microarray analysis. A total of 18 hybridizations were performed to directly compare total RNA from methyl jasmonate-treated and tween-treated control leaves at each time point, as well as among methyl jasmonate-treated leaves across time points, with dye balance.
2008-12-30 | E-GEOD-14039 | biostudies-arrayexpress
Project description:We investigated the transcriptional response of hybrid poplar (Populus trichocarpa x deltoides) source and sink leaves to simulated herbivory (mechanical wounding plus the application of Malacosoma disstria oral secretions) over a 24 hour time course. Experiments were conducted using clonal trees under greenhouse conditions at the University of British Columbia. We used the 15.5K poplar cDNA microarray platform previously described by Ralph et al. (Molecular Ecology 2006, 15:1275-1297). Differentially expressed genes were determined using three criteria: fold-change between treated and untreated control leaves > 1.5-fold, P value < 0.05 and Q value < 0.05. This study identified > 3,000 differentially expressed genes in response to simulated insect feeding damage, which possess distinct source/sink and treated/systemic patterns.
2009-06-03 | GSE16365 | GEO
Project description:We investigated the transcriptional response of hybrid poplar (Populus trichocarpa x deltoides) source and sink leaves to simulated herbivory (mechanical wounding plus the application of Malacosoma disstria oral secretions) over a 24 hour time course. Experiments were conducted using clonal trees under greenhouse conditions at the University of British Columbia. We used the 15.5K poplar cDNA microarray platform previously described by Ralph et al. (Molecular Ecology 2006, 15:1275-1297). Differentially expressed genes were determined using three criteria: fold-change between treated and untreated control leaves > 1.5-fold, P value < 0.05 and Q value < 0.05. This study identified > 3,000 differentially expressed genes in response to simulated insect feeding damage, which possess distinct source/sink and treated/systemic patterns.
2009-06-03 | GSE16366 | GEO
Project description:We investigated the transcriptional response of hybrid poplar (Populus trichocarpa x deltoides) leaves to a variety of stress treatments (insect feeding by Malacosoma disstria larvae, mechanical wounding, wounding plus the application of insect oral secretions, and methyl jasmonate spray) over a 24 hour time course. Experiments were conducted using clonal trees under greenhouse conditions at the University of British Columbia. We used the 15.5K poplar cDNA microarray platform previously described by Ralph et al. (Molecular Ecology 2006, 15:1275-1297). Differentially expressed genes were determined using three criteria: fold-change between treated and untreated control leaves > 1.5-fold, P value < 0.05 and Q value < 0.05. This study identified > 1,000 differentially expressed genes in response to insect feeding and/or treatments that mimic insect feeding damage. For each stress treatment, we compared RNA from leaves of four individual treated trees versus four individual control trees, with dye balance, using a total of 16 slides for the four treatments examined. Based on an earlier study using pooled biological replicates (90 trees) to examine a large combination of 18 treatments and time points, we selected the peak response time point for each treatment for further investigation using individual tree replicates. The time points and treatments examined were as follows: 24 hours for insect feeding, 6 hours for mechanical wounding, and 2 hours for both wouding plus oral secretions and methyl jasmonate. In the original experiment, leaves were harvested 2, 6 or 24 hours after the initiation of each treatment. For each tree, the lowest five mature leaves were caged in nylon mesh bags, treated or left untreated as a control. As a control for methyl jasmonate treatments, we used a tween solvent.
2010-09-09 | E-GEOD-14081 | biostudies-arrayexpress
Project description:We investigated the transcriptional response of hybrid poplar (Populus trichocarpa x deltoides) leaves to a variety of stress treatments (insect feeding by Malacosoma disstria larvae, mechanical wounding, and wounding plus the application of insect oral secretions) over a 24 hour time course. Experiments were conducted using clonal trees under greenhouse conditions at the University of British Columbia. We used the 15.5K poplar cDNA microarray platform previously described by Ralph et al. (Molecular Ecology 2006, 15:1275-1297). Differentially expressed genes were determined using three criteria: fold-change between treated and untreated control leaves > 1.5-fold, P value < 0.05 and Q value < 0.05. This study identified > 1,000 differentially expressed genes in response to insect feeding and/or treatments that mimic insect feeding damage.
2008-12-31 | GSE13767 | GEO
Project description:We investigated the transcriptional response of hybrid poplar (Populus trichocarpa x deltoides) leaves to a variety of stress treatments (insect feeding by Malacosoma disstria larvae, mechanical wounding, and wounding plus the application of insect oral secretions) over a 24 hour time course. Experiments were conducted using clonal trees under greenhouse conditions at the University of British Columbia. We used the 15.5K poplar cDNA microarray platform previously described by Ralph et al. (Molecular Ecology 2006, 15:1275-1297). Differentially expressed genes were determined using three criteria: fold-change between treated and untreated control leaves > 1.5-fold, P value < 0.05 and Q value < 0.05. This study identified > 1,000 differentially expressed genes in response to insect feeding and/or treatments that mimic insect feeding damage. A factorial hybridization design was chosen to assess gene expression among the untreated control leaves, and leaves subjected to one of three stress treatments: forest tent caterpillar (Malacosoma disstria) feeding, mechanical wounding, and mechanical wounding plus the application of forest tent caterpillar oral secretions. For each tree, the lowest five mature leaves were caged in nylon mesh bags, treated or left untreated as a control. Leaves were harvested 2, 6 or 24 hours after the initiation of each treatment and total RNA was individually isolated from each tree. For each treatment and time point, equal amounts of total RNA were combined from each of the five biological replicate trees prior to cDNA microarray analysis. For the herbivory, mechanical wounding and oral secrection treatments, total RNA from treated and untreated control leaves was compared using a balanced loop consisting of direct and indirect comparisons across treatments and time points, with dye balance, using a total of 54 hybridizations.
2008-12-30 | E-GEOD-13767 | biostudies-arrayexpress
Project description:Gene expression response of Populus cell cultures subjected to methyl jasmonate feeding was analyzed using the Affymetrix poplar genome microarrays. Keywords: Stress response
2009-12-01 | GSE16773 | GEO
Project description:Gene expression response of Populus cell cultures subjected to methyl jasmonate feeding was analyzed using the Affymetrix poplar genome microarrays. Experiment Overall Design: Populus tremuloides suspension cells were treated with methyl jasmonate (MJ) in DMSO or with DMSO alone (C). Cells were harvested after 48 hours. Two biological replicates were obtained for each condition.
2009-12-14 | E-GEOD-16773 | biostudies-arrayexpress
Project description:To better understand the role of phenylpropanoid pathway perturbation in plant metabolism, Populus tremuloides cell cultures previously established from leaf mesophyll tissue were fed with methyl jasmonate, alpha-aminooxy-beta-phenylpropionic acid (AOPP), or both approximately 5 days after transfer to fresh medium. Methyl jasmonate is an elicitor that activates a suite of defense responses including phenylpropanoid metabolism. In contrast, AOPP acts as an inhibitor of phenylalanine ammonia lyase (PAL). Samples were harvested 48 hrs after initiation of the experiment. Total RNA was extracted and gene expression measured using Affymetrix poplar genome microarrays.
2022-05-06 | GSE154224 | GEO