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Study of poplar shoot apex transcriptomic response to variations in soil water avaialbility

ABSTRACT: 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 × 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.

ORGANISM(S): Populus x canadensis Populus trichocarpa

PROVIDER: GSE46605 | GEO | 2014/01/01

SECONDARY ACCESSION(S): PRJNA201335

REPOSITORIES: GEO

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Study of poplar shoot apex transcriptomic response to variations in soil water avaialbility

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

Study of poplar shoot apex methylome response to variations in soil water avaialbility

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, DNA methylation 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. Transcriptomic response was also studied and is another GEO submission. 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. DNA was extracted from 3 individuals per condition and pooled. For each condition, methylated DNA was isolated using a MethylDNA Immunoprecipitation (MeDIP) and both total DNA and MeDIP fraction were hybridised to microarrays.

2014-01-01 | E-GEOD-46624 | biostudies-arrayexpress

Study of poplar shoot apex methylome response to variations in soil water avaialbility

2014-01-01 | GSE46624 | GEO

C2-signature in Moricandia under limited soil water availability

Project description:Transcriptome profiling in response to water stress and rewatering of Moricandia species with C3 and C3-C4 intermediate photosynthesis.

2023-02-13 | GSE210653 | GEO

rewatering-Global gene expression in young differentiating xylem of poplar in response to a drought –rewatering cycle

Project description:affy_rewatering_poplar - rewatering - Biological question (15 lines max): Xylogenesis is a complex process and is highly influenced by environmental factors. Numerous studies have shown xylem structural acclimation to moderate and long-lasting water deficits. A decrease in cell lumen size and an increase in vessel density are generally observed. Other preliminary experiments in our laboratory focusing on a short and progressive drought-rewatering cycle in poplar show a gradual decrease in fibre size with decreasing water availability and an important rise in vessel number with irrigation recovery. This suggests a reorientation during the early stages of cambial derivatives differentiation towards vessel formation. The aim of this study is to characterize global gene expression in young differentiating xylem of poplar in response to a drought-rewatering cycle. Results should provide a comprehensive genomic basis for the xylem structural modifications observed.-The experimental design consisted in a differential water supply. Experiments were done on tilted trees to induce tension wood formation. Trees were regularly irrigated at full capacitance until July 18, 2007, the beginning of the experiment. Two sets of plants were designed. For each set, irrigation was withheld until July 25, 2007. At this time, one of the two sets (treated-sample) was re-irrigated at full capacitance during 14hrs (WDR) while the other one was maintained under water deficit (WD). Samples were collected after the 14hrs for all trees. Keywords: treated vs untreated comparison

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rewatering-Global gene expression in young differentiating xylem of poplar in response to a drought ârewatering cycle

2010-06-16 | E-GEOD-20061 | biostudies-arrayexpress

Genetical genomics implicates the IAA biosynthesis pathway in the regulation of Populus adventitious root formation

Project description:Adventitious roots (AR) develop from tissues other than the primary root, in a developmental process physiologically regulated by phytohormones. Adventitious roots provide structural support and contribute to water and nutrient absorption, and are critical for commercial vegetative propagation of several crops. Here we quantified the number of AR, root architectural traits and root biomass in cuttings from a pseudo-backcross population of Populus deltoides and Populus trichocarpa. Quantitative trait loci (QTL) mapping and whole-transcriptome analysis of individuals carrying alternative QTL alleles for AR number wereas used to identify putative regulatorsregions in the genome that regulateof AR development in the genome., and putative candidate genesregulators.

2016-03-01 | GSE71630 | GEO

affy_popsec_nancy_pophydro_roots_poplar -Molecular bases of acclimation and adaptation to water deficit in poplar

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

2011-01-15 | GSE17225 | GEO

affy_popsec_nancy_pophydro_roots_poplar -Molecular bases of acclimation and adaptation to water deficit in poplar

2011-01-15 | E-GEOD-17225 | biostudies-arrayexpress

Response of grapevine shoot apex expression to grafting with rootstocks

Project description:The transcriptional response in the shoot apex to hetero-grafting Cabernet Sauvignon (CS) with the rootstocks 1103 Paulsen (CS/1103P) and Riparia Gloire de Montpellier (CS/RG) compared to the auto-grafted control (CS/CS) four months after grafting. Gene expression profiling was done using the Nimblegen whole genome array with 4 biological replicates of 5 pooled shoot apices.

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