E-MTAB-4114
Ontology highlight
ABSTRACT:
TISSUE(S): Shoot Apex, Leaf
PROVIDER: E-MTAB-4114 | ExpressionAtlas | 2016-04-28
REPOSITORIES: ExpressionAtlas
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| E-MTAB-4114-analysis-methods.tsv | Tabular | |||
| E-MTAB-4114-analytics.tsv | Tabular | |||
| E-MTAB-4114-analytics.tsv.undecorated | Tabular | |||
| E-MTAB-4114-analytics.tsv.undecorated.unrounded | Tabular | |||
| E-MTAB-4114-analytics.tsv.unrounded | Tabular |
Items per page: 5 1 - 5 of 147 |
Similar Datasets
Project description:The timing of reproductive development determines spike architecture and thus yield in temperate grasses such as barley (Hordeum vulgare L.). Reproductive development in barley is controlled by the photoperiod response gene Ppd-H1 which accelerates flowering time under long-day (LD) conditions. A natural mutation in Ppd-H1 prevalent in spring barley causes a reduced photoperiod response, and thus, late flowering under LD. However, it is not very well understood how LD and Ppd-H1 control pre-anthesis development, and thus spike architecture and yield in barley. We performed a detailed morphological analysis of the pre-anthesis development in the spring barley cultivar Scarlett and its wild barley derived introgression line S42-IL107, carrying the photoperiod responsive Ppd-H1 allele. Characterization of shoot apex development in these genotypes indicated that floral transition and initiation of floral primordia occurred under LD (16h light/ 8h dark) and short day (SD, 8h light/ 16h dark) conditions, while inflorescence and seed development strictly required LDs. Additionally, a fast photoperiod response in the presence of the dominant Ppd-H1 allele promoted floret fertility under LDs. To characterize the effects of the photoperiod and allelic variation at Ppd-H1 on gene expression during pre-anthesis development we performed RNA sequencing of leaves and developing main shoot apices during the vegetative phase and early stages of inflorescence development in Scarlett and S42-IL107 grown under SD and LD conditions. Main shoot apices of both genotypes were sampled at defined developmental stages, i.e. Waddington stage W0.5, W1.0, W2.0 and W3.5, respectively. Leaf samples were harvested from plants before (W1.0) and after floral transition (W2.0). We identified genes that were specifically regulated at floral transition independent of day-length and Ppd-H1 and thus may serve as markers for the staging of floral transition. Furthermore, we identified transcripts differentially expressed between photoperiods and between genotypes in leaves and in shoot apices. This set of transcripts might act as candidates downstream of Ppd-H1 and are correlated with the promotion of shoot apex development and higher floret fertility under LD and in the presence of the photoperiod responsive Ppd-H1 allele.
2015-03-10 | E-MTAB-4114 | biostudies-arrayexpress
Project description:Expression profiling of developing barley main shoot apices and leaves during the vegetative phase and early inflorescence development in response to the photoperiod and natural allelic variation at Ppd-H1
| PRJEB8748 | ENA
Project description:Natural variation in the barley homolog of CENTRORADIALIS (HvCEN), was found to contribute to the expansion of barley cultivation into diverse habitats. It has been shown that induced hvcen mutants, originally designated as praematurum-c/maturity-c (mat-c) mutants, flowered a few days earlier under natural long-day conditions. All hvcen mutants flowered early and showed a reduction in spikelet number per spike, tiller number and yield in the outdoor experiments. Further evaluating development of main shoot apex of hvcen mutants and wild type under controlled long day and short day conditions showed that mutations in hvcen accelerated spikelet initiation and reduced axillary bud number in a photoperiod independent manner, but promoted floret development only under long days. In this project we investigate the pleiotropic effects of HvCEN on developmental timing and shoot and spike morphologies of barley and dependence on these effects on photoperiod. This RNAseq dataset was generated to identify the putative transcriptional targets of HvCEN. To this end, we used global transcriptome profiling in developing shoot apices and inflorescences of two allelic hvcen mutants (mat-c.907 and mat-c.943) and wild-type (Bonus) plants grown under long- and short-day photoperiods.
2019-04-23 | E-MTAB-7807 | biostudies-arrayexpress
Project description:Plants grow continuously and undergo numerous changes in their vegetative morphology and physiology during their life span. The molecular basis of these changes is largely unknown. To provide a more comprehensive picture of shoot development in Arabidopsis, microarray analysis was used to profile the mRNA content of shoot apices of different ages, as well as leaf primordia and fully-expanded leaves from 6 different positions on the shoot, in early-flowering and late-flowering genotypes. This extensive dataset provides a new and unexpectedly complex picture of shoot development in Arabidopsis. At any given time, the pattern of gene expression is different in every leaf on the shoot, and reflects the activity at least 6 developmental programs. Three of these are specific to individual leaves (leaf maturation, leaf aging, leaf senescence), two occur at the level of the shoot apex (vegetative phase change, floral induction), and one involves the entire shoot (shoot aging). Our results demonstrate that vegetative development is a much more dynamic process that previously imagined, and provide new insights into the underlying mechanism of this process.
2019-11-30 | GSE122691 | GEO
Project description:In the present study, we elucidate the molecular and hormonal role of the Six-rowed spike 2 (Vrs2) — a SHORT INTERNODES (SHI) transcriptional regulator during barley inflorescence and shoot development. Here we show that Vrs2 is specifically involved in floral organ patterning and phase duration by maintaining hormonal homeostasis and gradients during normal spike development; but similarly influenced plant stature traits. Furthermore, we establish a first link between the SHI-protein family and sucrose metabolism during organ growth and development, which may have implications for deeper molecular insights into crops' inflorescence and plant architecture. Differential gene expression study between BW-NIL(vrs2.e) vs. Bowman was done on the extracted RNA from immature shoot apices to infer the differences at level of expression at early spike developmental stages (triple mound (TM), glume primordia (GP), stamen primordia (SP), awn primordia (AP)).
2016-10-07 | GSE87731 | GEO
Project description:Many plants dramatically elongate their vegetative stems following flowering, yet it is unclear how this response is linked to the reproductive phase. We show that microRNA (miRNA) control of a deeply conserved phase change transcription factor, APETALA (AP2), is required for rapid and complete elongation of stem internodes in barley, especially of the final 'peduncle' internode directly underneath the inflorescence. Disrupted miR172-targeting of AP2 causes leads to short peduncles in the Zeo barley mutant due to reduced cell number and late stage cell expansion, which was associated with lower mitotic activity, delayed growth dynamics and premature lignification. In agreement, multiple, stage and tissue specific comparative transcriptomics revealed decreased expression of proliferation-associated genes, and ectopic expression of maturation-related genes in Zeo1.b. In addition, Zeo1.b peduncles showed persistent, elevated expression of genes associated with jasmonate (JA) and stress responses. Reproductive development including stem elongation in Zeo1.b was hypersensitive to inhibition by methyl JA (MeJA) but less responsive to promotion via gibberellin (GA). Based on these data, we propose that miR172- restriction of AP2 during flowering may release JA-associated vegetative growth restraint in order to facilitate GA-promoted stem growth in the reproductive phase. Microarray experiment MS. Comparison of control Bowman (Bw) and mutant (Zeo1.b) lines in spike (developing flower) tissue at 21 days post-anthesis.
2019-05-01 | E-MTAB-7228 | biostudies-arrayexpress
Project description:We were interested in changes in small RNA abundance changes in response to developmental transitions in Arabidopsis thaliana shoots, with special focus on vegetative phase change. We specifically wanted to separate the temporal changes in gene expression that result from vegetative phase change and those from flowering. Because of the close timing between the juvenile-to-adult and adult-to-reproductive developmental transitions in Arabidopsis grown under long day conditions, we used the late-flowering genotype FRI;FLC developed by the lab of Richard Amasino by introgressing the FRI allele from Sf-2 into the Col-0 genetic background, which is fri;FLC. For the early flowering genotype, we used FRI;flc-3, also developed by the Amasino lab by EMS-mutagenizing FRI;FLC, identifying early flowering mutants, and backcrossing multiple times to eliminate other EMS-induced mutations. The onset of vegetative phase change in FRI;FLC and FRI;flc-3 under our growth conditions was identical, but the progression was slower in FRI;FLC. By sequencing small RNAs from shoot apices at different time points and fully-expanded leaves at different positions on the shoot and comparing the results between the two genotypes, we were able to obtain a clear picture of changes in small RNA abundance in response to vegetative phase change and flowering in Arabidopsis. For the small RNA samples, we performed two replicates using two different indices in the 5'-adapter and ran each replicate pair on the same sequencing lane. For the cotyledon and leaf samples we only performed one replicate using the same index for all samples because we obtained significantly different results with the two adapters used for the shoot apices, preventing us from using them as true replicates.
2016-02-01 | GSE72303 | GEO
Project description:Many plants dramatically elongate their vegetative stems following flowering, yet it is unclear how this response is linked to the reproductive phase. We show that microRNA (miRNA) control of a deeply conserved phase change transcription factor, APETALA (AP2), is required for rapid and complete elongation of stem internodes in barley, especially of the final 'peduncle' internode directly underneath the inflorescence. Disrupted miR172-targeting of AP2 causes leads to short peduncles in the Zeo barley mutant due to reduced cell number and late stage cell expansion, which was associated with lower mitotic activity, delayed growth dynamics and premature lignification. In agreement, multiple, stage and tissue specific comparative transcriptomics revealed decreased expression of proliferation-associated genes, and ectopic expression of maturation-related genes in Zeo1.b. In addition, Zeo1.b peduncles showed persistent, elevated expression of genes associated with jasmonate (JA) and stress responses. Reproductive development including stem elongation in Zeo1.b was hypersensitive to inhibition by methyl JA (MeJA) but less responsive to promotion via gibberellin (GA). Based on these data, we propose that miR172- restriction of AP2 during flowering may release JA-associated vegetative growth restraint in order to facilitate GA-promoted stem growth in the reproductive phase. Microarray experiment M1. Comparison of control Bowman (Bw) and mutant (Zeo1.b) lines in peduncle initials tissue.
2019-05-01 | E-MTAB-7229 | biostudies-arrayexpress
Project description:Many plants dramatically elongate their vegetative stems following flowering, yet it is unclear how this response is linked to the reproductive phase. We show that microRNA (miRNA) control of a deeply conserved phase change transcription factor, APETALA (AP2), is required for rapid and complete elongation of stem internodes in barley, especially of the final 'peduncle' internode directly underneath the inflorescence. Disrupted miR172-targeting of AP2 causes leads to short peduncles in the Zeo barley mutant due to reduced cell number and late stage cell expansion, which was associated with lower mitotic activity, delayed growth dynamics and premature lignification. In agreement, multiple, stage and tissue specific comparative transcriptomics revealed decreased expression of proliferation-associated genes, and ectopic expression of maturation-related genes in Zeo1.b. In addition, Zeo1.b peduncles showed persistent, elevated expression of genes associated with jasmonate (JA) and stress responses. Reproductive development including stem elongation in Zeo1.b was hypersensitive to inhibition by methyl JA (MeJA) but less responsive to promotion via gibberellin (GA). Based on these data, we propose that miR172- restriction of AP2 during flowering may release JA-associated vegetative growth restraint in order to facilitate GA-promoted stem growth in the reproductive phase. Microarray experiment M3. Comparison of control Bowman (Bw) and mutant (Zeo1.b) lines in peduncle (stage 3) tissue.
2019-05-01 | E-MTAB-7231 | biostudies-arrayexpress
Project description:Many plants dramatically elongate their vegetative stems following flowering, yet it is unclear how this response is linked to the reproductive phase. We show that microRNA (miRNA) control of a deeply conserved phase change transcription factor, APETALA (AP2), is required for rapid and complete elongation of stem internodes in barley, especially of the final 'peduncle' internode directly underneath the inflorescence. Disrupted miR172-targeting of AP2 causes leads to short peduncles in the Zeo barley mutant due to reduced cell number and late stage cell expansion, which was associated with lower mitotic activity, delayed growth dynamics and premature lignification. In agreement, multiple, stage and tissue specific comparative transcriptomics revealed decreased expression of proliferation-associated genes, and ectopic expression of maturation-related genes in Zeo1.b. In addition, Zeo1.b peduncles showed persistent, elevated expression of genes associated with jasmonate (JA) and stress responses. Reproductive development including stem elongation in Zeo1.b was hypersensitive to inhibition by methyl JA (MeJA) but less responsive to promotion via gibberellin (GA). Based on these data, we propose that miR172- restriction of AP2 during flowering may release JA-associated vegetative growth restraint in order to facilitate GA-promoted stem growth in the reproductive phase. Microarray experiment M2. Comparison of control Bowman (Bw) and mutant (Zeo1.b) lines in peduncle (stage 2) tissue.
2018-12-01 | E-MTAB-7230 | biostudies-arrayexpress