Expression profiling of PEG induced water stress responsive genes in Eucalyptus grandis
Ontology highlight
ABSTRACT:
ORGANISM(S): Eucalyptus grandis
SUBMITTER: Genotypic technology
PROVIDER: E-GEOD-73106 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:The study was conducted to identify differentially expressed polyethylene glycol (PEG) induced water stress responsive genes in E. grandis. Forty day old rooted cutting of E. grandis was subjected to -0.225 MPa PEG treatment and total RNA was isolated from leaves of water treated control and PEG treated samples after three hours of treatment. The differential expression of water stress responsive genes was analyzed using microarray technique.
2016-01-01 | GSE73106 | GEO
Project description:Embolism and the refilling of xylem vessels are intrinsic to the ability of plants to handle the transport of water under tension. While the formation of an embolized vessel is an abiotic process, refilling against the pressure gradient requires biological activity to provide both the energy and the water needed to restore xylem transport capacity. We used microarrays to analyze the global transcriptome response of xylem parenchyma cells after embolism formation or infiltration of xylem tissue with sucrose solution. Plants subjected to artificial embolism treatment (ET), to sucrose infiltration treatment (ST), and controls (C) were selected for RNA extraction and hybridization on Affymetrix microarrays. Embolism was artificially induced through air-injection into the stems of the ET plants, while ST plants were exposed to osmotic stress by adding sucrose to the growing solution. Woody stems were respectively collected 90 minutes following the injection and after 90 minutes of exposure to sucrose.
2011-09-22 | E-GEOD-32322 | biostudies-arrayexpress
Project description:Rooting capability is one of the economically traits lost during the juvenile to mature phase change in woody plants. A comprehensive microarray analysis was performed to compare the profiles of gene expression in juvenile and mature cuttings from E. grandis, either auxin treated or untreated on days, 0, 1, 3, 6, 9 and 12 post excision. At the end of the experiment, root primordia were observed only in auxin treated juvenile cuttings. Clustering the expression profiles revealed that the time after excision contributed to expression differences more than the age or auxin. Maximum differences contributed by the age and auxin occurred on day 6 which correlated with the kinetics of root primordia formation. These included genes related to the microtubules (MTs) system. Therefore, expression of 42 transcripts annotated as tubulin or MTs associated proteins (MAPs) was validated in the same RNA samples. The results suggest developmental and auxin regulation of MTs. To determine the relevance to adventitious root (AR) formation, subtle perturbations to MTs were performed with trifluralin during induction. While juvenile cuttings were not affected, improved rooting was obtained in mature cuttings. Taken together it suggests that specific MTs remodeling is required for AR formation in E. grandis. mRNA samlpes from mature and juvenile Eucalyptus sections immediately after cutting served as contorls. The rest of the samples were mature and juvenile sections, treated of not treated with Auxin, 1, 3, 6, 9 and 12 days after the prunning. At each time point, a loop design was performed consisting of a juvenile untreated vs. mature untreated array, a matrue untreated vs. mature auxin treated array, a matrue auxin treated vs. juvenile auxin treated array, and a juvenile auxin treated vs. juvenile untreated array. additional arrays connected between these loops, and between them and the time 0 controls. Most conditions had 3 replicates, but mature-untreated-day1 had 4 replicates, and three conditions had 2 replicates each: Juvenile-auxin-treated-day1, juvenile-untreated-day6, and mature-auxin-treated-day9.
2015-05-01 | E-GEOD-57375 | biostudies-arrayexpress
Project description:In a context of climate changes, water availability is expected to become a limiting factor for plant growth and to have an impact on forest health. In order to identify genes involved in shoot phenotypic plasticity in response to variations in water availability in trees, gene expression patterns were investigated in the shoot apical meristem (SAM) of Populus deltoides M-CM-^W P. nigra hybrid cuttings submitted to a moderate water deficit followed by a rewatering step. Methylome response was also studied and is another GEO submission. Several gene clusters with expression patterns specific to SAM drought response as well as specific to the rewatering condition could be identified. Among them, genes involved in phytohormone pathways like brassinosteroids were found. Populus deltoides M-CM-^W P. nigra 'Carpaccio' hybrid cuttings were submitted to 3 water conditions: non-limiting, water deficit and water deficit/rewatering cycle (14 days treatment). At the end of the experiment, buds were collected and SAM maually isolated for 6 individuals per condition. Total RNA were independently extracted from 3 individuals per condition and used for microarray analyses.
2014-01-01 | E-GEOD-46605 | biostudies-arrayexpress
Project description:The expression pattern of transcripts involved in secondary development was determined in four genotypes of E. tereticornis using 8x60K Gene chip. The genome-wide expression data was used to develop a gene co-expression network for xylogenesis. Agilent one-color experiment, Organism: Eucalyptus,Custom Agilent Eucalyptus 8x60k Microarray Gene expression (AMADID: 59849 ) designed by Genotypic Technology Pvt.Ltd.
2016-07-03 | E-GEOD-73030 | biostudies-arrayexpress
Project description:Illumina HiSeq technology was used to generate mRNA profiles from in vitro Eucalyptus grandis roots interacting with two different Pisolithus microcarpus strains (SI-9 and SI-12) and under two different CO2 concentrations (400 and 650 ppm) . Control roots or ectomycorrhizal root tips were harvested after 1 month and used for RNA extraction. Paired-end (2X150bp) reads were generated and aligned to Eucalyptus grandis transcripts (http://www.phytozome.net/; primarytranscripts only) using CLC Genomics Workbench 6.
2014-10-10 | GSE62227 | GEO
Project description:The daily cycle of night and day affects the behaviour and physiology of almost all living things. At the molecular level, many genes show daily changes in expression levels. To determine whether changes in transcript abundance occur in wood forming tissues of Eucalyptus trees we used a cDNA microarray to examine gene expression levels at roughly four hour intervals throughout the day. Experiments were performed using RNA extracted from two biological replicates - GU (Eucalyptus grandis x E. urophylla) and GC (Eucalyptus grandis x camaldulensis) trees. A loop design was used, linking six time points. A dye swap was incorporated to eliminate dye bias.
2010-06-25 | E-GEOD-11731 | biostudies-arrayexpress
Project description:affy_popsec_nancy_pophydro_roots_poplar - This project aims to identify genes of interest for control of root growth in response to water deficit in a tree species: poplar. We look for genes and gene expression networks related to drought stress. We intend to analyse the transcriptome in root apices of cuttings grown in hydroponics and osmotically stressed with PEG. Root apex is the location of root elongation and these analyses intend to identify genes involved in the control of cell expansion and thus of root elongation. Indeed, root growth maintenance in response to water shortage contributes to plant tolerance to water deficit.-Poplar cuttings (cv Soligo) were grown in hydroponics. A moderate water deficit was applied by adding PEG to the nutrient solution (200g/l). After 3 days, the apex (1 cm-long) of the roots of each cutting were collected. For control and stressed treatments, RNAs were extracted from two pools of 5 to 9 roots (issued from 2 to 5 cuttings). A pool is considered as one biological replicate and corresponds to one Affymetrix slide. Keywords: treated vs untreated comparison 4 arrays - poplar
2011-01-15 | E-GEOD-17225 | biostudies-arrayexpress
Project description:In order to pinpoint the most differentially expressed genes between Eucalyptus grandis leaf blades and vascular (xylem) tissues as well as between E. grandis and Eucalyptus globulus xylem tissues, a total number of nine 50mer-oligoprobes covering the length of each one of 21,432 unique sequences derived from the Genolyptus EST dataset were synthesized “on-chip” in duplicate, randomly distributed in two blocks of each slide. Probes were also synthesized from ten cDNA sequences encoding known human proteins as negative controls, totaling 21,442 sequences. Leaves and xylem samples were taken from two E. grandis clonal trees, i.e., both derived from the same matrix tree and harboring the same genotype. Two additional xylem samples were collected from two other E. grandis clonal trees of a different genotype, as well as from two E. globulus clonal trees. Therefore, ten cDNA samples and ten identical chips were produced at Roche NimbleGen for the microarray assays, with a total number of 385,956 features per slide. Besides the discovery of differentially expressed genes between leaf and xylem, we wanted to test the validity of the assumed “technical” and “biological duplicates” since all trees were field-grown and four years-old in age. A ten chip study using total RNA recovered from mature leaf and vascular (xylem) tissues of Eucalyptus grandis and xylem from Eucalyptus globulus trees. Two clonal trees of E. grandis (E.grandis_Clone A_Ramet 1 and E.grandis_Clone A_Ramet 2), derived from a single matrix tree and therefore genomically identical, were the source of two samples of leaf RNA and two samples of xylem RNA, individually hybridized to four chips after cDNA synthesis/Cy3 labeling. Two other clonal trees of E. grandis (E.grandis_Clone B_Ramet 1 and E.grandis_Clone B_Ramet 2), derived from a different matrix tree, were the source of two additional samples of xylem RNA individually hybridized to four chips after cDNA synthesis/Cy3 labeling. Likewise, two pairs of clonal trees of E. globulus (E.globulus_Clone A_Ramet 1 and E.globulus_Clone A_Ramet 2/ E.globulus_Clone B_Ramet 1 and E.globulus_Clone B_Ramet 2), derived from two distinct matrix trees, were the source of four additional samples of xylem RNA, individually hybridized to four chips after cDNA synthesis/Cy3 labeling. Each chip measures the expression level of 21,432 genes from Eucalyptus sp. and ten human genes (negative controls) with nine 50-mer probe pairs (PM/MM) per gene in two separate blocks per chip (technical duplicate), totalizing 18 hybridization signal values per gene per chip.
2011-12-31 | E-GEOD-31696 | biostudies-arrayexpress
Project description:Background: The change from juvenile to mature phase in woody plants is often accompanied by a gradual loss of rooting ability, as well as by reduced microRNA (miR) 156 and increased miR172 expression. Results: We characterized the population of miRNAs of Eucalyptus grandis and compared by Northern blot the gradual reduction in miR156 and increase in miR172 expression during development to the loss of rooting ability. Forty known and eight novel miRNAs were discovered and their predicted targets are listed. The expression pattern of nine miRNAs was determined during adventitious root formation in juvenile and mature cuttings. While the expression levels of miR156 and miR172 were inverse in juvenile and mature tissues, no mutual relationship was found between high miR156 expression and rooting ability, or high miR172 expression and loss of rooting ability. This is shown both in E. grandis and also in E. brachyphylla, in which explants that underwent rejuvenation in tissue culture conditions were also examined. Conclusions: It is suggested that in these Eucalyptus species, there is no correlation between the switch of miR156 with miR172 expression in the stems and the loss of rooting ability. Examination of microRNA in seedlings of Eucalyptus grandis
2014-10-01 | E-GEOD-58367 | biostudies-arrayexpress