Thermospermine-induced transcriptomic changes in Populus stem
Ontology highlight
ABSTRACT:
ORGANISM(S): Populus sp. Populus tremula x Populus tremuloides
PROVIDER: GSE45879 | GEO | 2015/06/01
SECONDARY ACCESSION(S): PRJNA196529
REPOSITORIES: GEO
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Project description:The expression of stress-related genes induced by feeding of chestnut moth larvae (Conistra vaccinii L.) was studied with Vitreoscilla hemoglobin-expressing (VHb) and non-transgenic hybrid aspen lines (Populus tremula x P. tremuloides). Besides the herbivore-injured leaves (L1), cDNA microarray analyses were conducted using uninjured leaves of hybrid aspen lines positioned above (A) and below (B) the herbivory exposed leaves.
2013-04-24 | GSE46331 | GEO
Project description:Aim of the project: Genome wide gene expression profiles across the cambial zone are analyzed in 35um resolution from wild type hybrid aspen (Populus tremula x tremuloides) and two independent LMX5::AtIPT7 over expressor transgenic Populus tree lines.
2016-07-14 | E-MTAB-4631 | biostudies-arrayexpress
Project description:The expression of stress-related genes induced by feeding of chestnut moth larvae (Conistra vaccinii L.) was studied with Vitreoscilla hemoglobin-expressing (VHb) and non-transgenic hybrid aspen lines (Populus tremula x P. tremuloides). Besides the herbivore-injured leaves (L1), cDNA microarray analyses were conducted using uninjured leaves of hybrid aspen lines positioned above (A) and below (B) the herbivory exposed leaves. Two-condition experiment, control vs. herbivory exposure. Two hybrid aspen lines: non-transgenic V617 and VHb expressing V617 /45. Of each plant, three leaf types were analysed: the injured/uninjured leaf (L1) and nonorthostichous leaf positioned above (A) and below (B). Biological replicates: 3. On each array, two samples representing L1, A or B leaf type of control and herbivory treatment of either V617 or V617/45 line. line V617: wt_A_rep1-3, wt_B_rep1-3, wt_L1_rep1-3 line V617/45: VHb_A_rep1-3, VHb_B_rep1-3, VHb_L1_rep1-3 leaf type A: wt_A_rep1-3, VHb_A_rep1-3 leaf type B: wt_B_rep1-3, VHb_B_rep1-4 leaf type L1: wt_L1_rep1-3, VHb_L1_rep1-5
2013-04-24 | E-GEOD-46331 | biostudies-arrayexpress
Project description:Metacaspases (MCs) are cysteine proteases that are implicated in programmed cell death of plants. AtMC9 (Arabidopsis thaliana Metacaspase9) is a member of the Arabidopsis MC family that controls the rapid autolysis of the xylem vessel elements, but its downstream targets in the xylem remain uncharacterized. PttMC13 and PttMC14 were identified as AtMC9 homologs of hybrid aspen (Populus tremula x tremuloides). A proteomic analysis was conducted in xylem tissues of transgenic hybrid aspen trees which carried either an overexpression or an RNAi construct for PttMC13 and PttMC14. The proteomic analysis revealed modulation of levels of both previously known targets of metacaspases, such as Tudor staphylococcal nuclease, heat shock proteins and 14-3-3 proteins as well as novel targets, such as homologs of the PUTATIVE ASPARTIC PROTEASE 3 (PASPA3) (PASPA) and the cysteine protease RD21 by PttMC13 and PttMC14. We identified here the pathways and processes that are modulated by PttMC13 and PttMC14 in xylem tissues. In particular, the results indicate involvement of PttMC13 and/or PttMC14 in controlling not only xylem cell autolysis but also cell death. This work provides a valuable reference dataset on xylem specific metacaspase functions for future functional and biochemical analyses.
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2018-03-13 | E-MTAB-4516 | biostudies-arrayexpress
Project description:In this study we report on transgenic hybrid aspen (Populus tremula x P. tremuloides) lines that showed potential to increase biomass production both in the greenhouse and after five years of growth in the field. The transgenic lines carried an overexpression construct for Populus tremula x tremuloides vesicle-associated membrane protein (VAMP)-associated protein PttVAP27-17 (Potri.019G116400) that was selected from a gene-mining program for novel regulators of wood formation. A proteomic analysis was performed to characterize the overall effect of the overexpression of PttVAP27-17 on plant metabolic pathways. 20 mg of xylem sample for the selected wild type (WT) and three transgenic lines (lines 1,2 and 3) was collected in the following manner from two-months-old, greenhouse grown trees: The frozen bottom-part of the stem (10-17 cm portion from the base of the stem) was peeled, and the surface of the secondary xylem consisting of living vessels and fibers (into the depth of approximately one mm from the surface) was scraped. The xylem scrapings were ground to fine powder in liquid nitrogen and stored at -80oC. The analyses included 3-5 biological replicates for each of the transgenic lines, and seven replicates for the wild type.
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Project description:The Poplar transcriptome was analyzed in mycorrhizal root tips in contact with Laccaria bicolor for 2 weeks. During mycorrhization the roots were treated with either 250M-BM-5m ACC, 10nM JA or 500M-BM-5M SA and compared to untreated mycorrhiza or control roots without contact to L. bicolor. In addition the poplar mutants 35S::PttACO1 and 35S::Atetr1 were used We performed 27 hybridizations (NimbleGen) with samples derived from Populus tremula x Populus alba clone 717-1B4 control roots, untreated mycorrhiza, SA-treated mycorrhiza, ACC-treated mycorrhiza and JA-treated mycorrhiza (3 biological replicates each) as well as Populus tremula x Populus tremuloides T89 control roots, mycorrhiza, 35S::PttACO1 mycorrhiza and 35S::Atetr1-1 mycorrhiza (3 biological replicates). All samples were labeled with Cy3.
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Project description:The majority of trees live in association with symbiotic fungi, which facilitate their access to soil nutrients. The ectomycorrhizal symbiosis represents a complex biological system involving multifaceted interactions between the two partners. The establishment of the symbiosis depends on various conditions (e.g. climate), but also on the genetic traits of the partners. To evaluate the impact of the genetic predisposition on the development and functioning of ectomycorrhizas, we compared the transcriptome of roots from Populus trichocarpa and Populus deltoides colonized with Laccaria bicolor. The Populus whole-genome expression array version 2.0 (S. DiFazio, A. Brunner, P. Dharmawardhana, and K. Munn, unpublished data) manufactured by NimbleGen Systems Limited (Madison, WI) contains in duplicates three independent, non-identical, 60-mer probes per whole gene model plus control probes and labeling controls. Included in the microarray are 65,965 probe sets corresponding to 55,970 gene models predicted on the P.trichocarpa genome sequence version 1.0 and 9,995 aspen cDNA sequences (Populus tremula, Populus tremuloides, and P. tremula x P. tremuloides). NimbleGen whole genome microarray analyses were performed in triplicate as per manufacturer's instructions. We carried out six hybridizations (NimbleGen) with samples derived from Populus trichocarpa and Populus deltoides mycorrhizal root tips. Three samples (biological replicates) originated from Populus trichocarpa (GSM648401, GSM648403, GSM648405) and three biological replicates from Populus deltoides (GSM648408, GSM648411, GSM648414). cDNA was synthesized using CLONTECH Super Smart cDNA Synthesis kit containing an amplification step on the cDNA level. All samples were labeled with Cy3.
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