Analysis of light induced secondary seed dormancy in Aethionema arabicum, Cyprus accession
Ontology highlight
ABSTRACT:
ORGANISM(S): Aethionema arabicum
PROVIDER: GSE237127 | GEO | 2023/09/01
REPOSITORIES: GEO
Similar Datasets
Project description:Light inhibits the seed germination in the Cypriot accession (CYP) of Aethionema arabicum. Extended light illumination also induces a secondary seed dormancy that inhibits the germination even if the seeds were transferred back to darkness. A forward genetic screen identified rgl2 mutant, that show light inhibited germination, but fails to re-enter the secondary dormancy. This analysis aims to compare the seed transcriptome before or after the dormancy was established by light illumination (100 µmol/m2s; white light). One day light treatment (1dL) inhibits the germination but the seeds are not yet dormant. Seven day (7dL) long light treatment induces dormancy in the WT but not in the rgl2 mutant.
2023-09-01 | GSE237220 | GEO
Project description:To establish the basis for understanding molecular mechanism of seed germination response to temperature, we analyzed transcriptomes in freshly harvested dormant and dry stored after-ripened seeds. The after-ripened seeds started to show visible germination from 36h after the start of imbibition, and almost all the seeds germinated after 3 days. The freshly harvested seeds stayed dormant by imbibition at 26°C, and germination of the after-ripened seeds was almost completely inhibited at 34°C. Total RNA was prepared from 0 (dry), 6 and 24h imbibed seeds to find regulatory genes of seed dormancy and germination.
2023-10-20 | GSE229182 | GEO
Project description:Plant embryos can survive years in a desiccated, quiescent state within seeds. In many species, seeds are dormant and unable to germinate at maturity. They acquire the capacity to germinate through a period of dry storage called after-ripening (AR), a biological process that occurs at 5-15% moisture when most metabolic processes cease. Because stored transcripts will be among the first proteins translated upon water uptake, they likely impact germination potential. Transcriptome changes associated with the increased seed dormancy of the GA-insensitive <i>sly1-2</i> mutant, and with dormancy loss through <i>sly1-2</i> after-ripening or constitutive overexpression of the GA receptor (GID1b) were characterized in dry seeds. This experiment used the same seed batches as a previous experiment (E-MTAB-4782) to characterize transcriptional changes associated with the increased seed dormancy and dormancy loss in imbibing seeds. The <i>SLY1</i> gene encodes the F-box subunit of an SCF E3 ubiquitin ligase needed for GA-triggered proteolysis of DELLA repressors of seed germination. In the <i>sly1-2</i> mutant, GA-directed DELLA proteolysis cannot occur leading to DELLA protein accumulation and increased dormancy. <i>sly1-2</i> mutant seeds are fully dormant at 2 weeks of dry storage (0% germination), but germinate well with very long after-ripening (51% germination after 19 months). <i>sly1-2</i> seed germination can also be rescued by overexpression of the GA receptor, <i>GA-INSENSITIVE DWARF1b</i> (<i>GID1b-OE</i>), which resulted in 74% germination at 2 weeks of dry storage. In this experiment, we sampled dry seeds of wild-type L<i>er</i> at 2 weeks of dry storage (non-dormant), dormant <i>sly1-2</i> (2 weeks of dry storage; <i>sly1-2</i>(D)), long after-ripened <i>sly1-2</i> (non-dormant, 19 months of dry storage; <i>sly1-2</i>(AR)), and <i>sly1-2 GID1b-OE</i> (non-dormant, 2 weeks of dry storage). This experimental design allowed comparison between these transcriptomes in dry seeds to determine if dry seed stored mRNA differences contribute to the dormancy phenotypes observed once seeds are imbibed. Seeds for L<i>er</i> wt, <i>sly1-2</i>(D), and <i>sly1-2 GID1b-OE</i> were grown alongside each other under the same conditions and after-ripened for 2 weeks. Seeds from <i>sly1-2</i>(AR) were grown under the same conditions in advance of the other lines to allow for the long after-ripening requirement. RNA was extracted using a phenol-chloroform-based extraction from three biological replicates per treatment.
2018-01-10 | E-MTAB-6135 | biostudies-arrayexpress
Project description:Wheat seed dormancy is released by after-ripening, and germination and seminal root growth of after-ripened/non-dormant seeds can be inhibited by treatment with exogenous ABA. We used Affymetrix GeneChip Wheat Genome Array to detail transcriptional programs affected by after-ripening of dormant seeds and imbibition of after-ripened seeds in ABA.
2013-06-05 | GSE32409 | GEO
Project description:Seed germination is a major step of plant growth and development. It is critical for species competition and spreading capacity in ecosystems. In agrosystems, it eventually impacts crop growth and yield. To prevent unappropriated germination under environmental conditions that do not guarantee the establishment of a robust plantlet, seeds from temperate species are generally dormant at maturity. Dormancy is a physiological mechanism that blocks seed germination even under favorable conditions and dormancy release is therefore required prior to germination [1]. A range of environmental (e.g. temperature, light, oxygen availability) and endogenous (e.g. hormonal) signals regulate these processes and germination completion, i.e. the early emergence of embryo radicle from seed envelope, can be achieved only when promoting mechanisms overcome inhibiting processes [2]. In that sense, the balance between the two antagonistic hormones abscisic acid (ABA) and gibberellins (GA), that inhibit and stimulate seed germination, respectively, promotes either dormancy (high ABA and low GA contents) or germination (low ABA and high GA contents) [3]
2022-07-06 | PXD033347 | Pride
Project description:Seed dormancy is the inability for seeds to germinate even under favorable conditions. In the Arabidopsis Landsberg <i>erecta</i> (L<i>er</i>) ecotype, 2 weeks of dry storage, called after-ripening, is sufficient to relieve seed dormancy. Such seed is referred to as after-ripened (AR) and has a high rate of germination when imbibed. While widespread transcriptome changes have been previously observed with seed dormancy loss, this experiment was designed to characterize transcriptional changes associated with the increased seed dormancy and dormancy loss of the gibberellin (GA) hormone-insensitive <i>sleepy1-2</i> (<i>sly1-2</i>) mutant. The <i>SLY1</i> gene encodes the F-box subunit of an SCF E3 ubiquitin ligase needed for GA-triggered proteolysis of DELLA repressors of seed germination. In the <i>sly1-2</i> mutant, GA-directed DELLA proteolysis cannot occur leading to DELLA protein accumulation and increased dormancy. <i>sly1-2</i> mutant seeds are fully dormant at 2 weeks of dry storage (0% germination), but germinate well with very long after-ripening (51% germination after 19 months). <i>sly1-2</i> seed germination can also be rescued by overexpression of the GA receptor, <i>GA-INSENSITIVE DWARF1b</i> (<i>GID1b-OE</i>), which resulted in 74% germination at 2 weeks of dry storage. In this experiment, we compared seeds of wild-type L<i>er</i> at 2 weeks of dry storage (non-dormant), dormant <i>sly1-2</i> (2 weeks of dry storage; <i>sly1-2</i>(D)), long after-ripened <i>sly1-2</i> (non-dormant, 19 months of dry storage; <i>sly1-2</i>(AR)), and <i>sly1-2 GID1b-OE</i> (non-dormant, 2 weeks of dry storage). Samples were collected at two imbibition timepoints: 1) a 0h timepoint after 4 days at 4°C, and 2) a 12h timepoint after 4 days at 4°C followed by 12 hours in the light at 22°C. These timepoints were selected to capture the transcriptomes at an early and late time in Phase II of imbibition. Using this experimental design we were able to determine transcriptome differences associated with seed dormancy in the <i>sly1-2</i> mutation (L<i>er</i> wt vs <i>sly1-2</i>(D)), and changes associated with <i>sly1-2</i> dormancy loss through dry after-ripening (<i>sly1-2</i>(AR) vs <i>sly1-2</i>(D)) or through <i>GID1b</i>-overexpression (<i>sly1-2 GID1b-OE</i> vs <i>sly1-2</i>(D)). Seeds for L<i>er</i> wt, <i>sly1-2</i>(D), and <i>sly1-2 GID1b-OE</i> were grown alongside each other under the same conditions and after-ripened for 2 weeks. Seeds from <i>sly1-2</i>(AR) were grown under the same conditions in advance of the other lines to allow for the long after-ripening requirement. RNA was extracted using a phenol-chloroform-based extraction from three biological replicates per treatment.
2017-05-09 | E-MTAB-4782 | biostudies-arrayexpress
Project description:affy_sunflower_2010_13 - affy_sunflower_2010_13 - It concerns the interaction between ROS and hormones in dormancy release in sunflower seeds. ABA is responsible for dormancy maintenance, while GA and ethylene promote seed germination. Based on our results, ROS could represent good candidate to shift from a hormone signalling to another determining the dormancy state in sunflower seeds.-We aim to understand the mechanisms controlling sunflower seed dormancy at the transcriptomic level, by the application of treatments which maintain dormancy as ABA, or alleviate dormancy as ROS and ethylene. Transcripts comparison will be performed between dormant and non-dormant sunflower embryo imbibed 24h on water, on ABA, on methylviologen, a pro-oxidant compound or on ethylene.
2013-08-01 | GSE44165 | GEO
Project description:affy_sunflower_2010_13 - affy_sunflower_2010_13 - It concerns the interaction between ROS and hormones in dormancy release in sunflower seeds. ABA is responsible for dormancy maintenance, while GA and ethylene promote seed germination. Based on our results, ROS could represent good candidate to shift from a hormone signalling to another determining the dormancy state in sunflower seeds.-We aim to understand the mechanisms controlling sunflower seed dormancy at the transcriptomic level, by the application of treatments which maintain dormancy as ABA, or alleviate dormancy as ROS and ethylene. Transcripts comparison will be performed between dormant and non-dormant sunflower embryo imbibed 24h on water, on ABA, on methylviologen, a pro-oxidant compound or on ethylene. 12 arrays - SUNFLOWER; treated vs untreated comparison
2013-08-01 | E-GEOD-44165 | biostudies-arrayexpress
Project description:Red rice fully dormant seeds do not germinate even under favourable germination conditions. In several species, including rice, seed dormancy can be removed by dry-afterripening (warm storage); thus, dormant and nondormant seeds can be compared for the same genotype. A weedy (red) rice genotype with strong dormancy was used for mRNA expression profiling, by RNA-Seq, of dormant and nondormant dehulled caryopses (here addressed as seeds) at two temperatures (30 °C and 10 °C) and two durations of incubation in water (8 hours and 8 days). Aim of the study was to highlight the differences in the transcriptome of dormant and nondormant imbibed seeds.
2018-05-10 | E-MTAB-6740 | biostudies-arrayexpress
Project description:Regulation of seed germination by dormancy relies on a complex network of transcriptional and post‐transcriptional modifications during seed imbibition that controls seed adaptive responses to environmental cues. High‐throughput technologies have brought significant progress in the understanding of this phenomenon and have led to identify major regulators of seed germination, mostly by studying the behaviour of highly differentially expressed genes. However, the actual models of transcriptome analysis cannot catch additive effects of small variations of gene expression in individual signalling or metabolic pathways, which are also likely to control germination. Therefore, the comprehension of the molecular mechanism regulating germination is still incomplete and to gain knowledge about this process we have developed a pathway‐based analysis of transcriptomic Arabidopsis datasets, to identify regulatory actors of seed germination. The method allowed quantifying the level of deregulation of a wide range of pathways in dormant versus non‐dormant seeds. Clustering pathway deregulation scores of germinating and dormant seed samples permitted the identification of mechanisms involved in seed germination such as RNA transport or vitamin B6 metabolism, for example. Using this method, which was validated by metabolomics analysis, we also demonstrated that Col and Cvi seeds follow different metabolic routes for completing germination, demonstrating the genetic plasticity of this process. We finally provided an extensive basis of analysed transcriptomic datasets that will allow further identification of mechanisms controlling seed germination.
2019-05-21 | MTBLS662 | MetaboLights