Ontology highlight
ABSTRACT:
PROVIDER: PRJNA454870 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR5277648_1.fastq.gz | Fastqsanger.gz | |||
| SRR5277648_2.fastq.gz | Fastqsanger.gz | |||
| SRR5277649.fastq.gz | Fastqsanger.gz | |||
| SRR6473305_1.fastq.gz | Fastqsanger.gz | |||
| SRR6473305_2.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 13 |
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Project description:Serangium japonicum isolate:SCAU2022 Genome sequencing
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Project description:Winter survival and maintenance strategy is crucial in temperate woody plants. Here, we demonstrate novel aspects of the transcriptional regulations adopted by perennial tree species in winter/dormancy, employing a biochemical and whole transcriptome analysis. As expected, genes related to cold hardiness and defense are over-represented. Interestingly, carbohydrate biosynthesis and transport-related genes were very actively expressed in winter/dormancy. Further biochemical analyses verified the dormancy/winter transcription phenotype. Furthermore, dormancy/winter preferential expression of genes involved in the cell wall biosynthesis/modification, circadian rhythm, the indirect transcriptional regulation (RNA metabolism), and chromatin modification/remodeling were identified. Taken together, regulation of gene expression in the winter survival and maintenance may include not only controlled by promoter binding transcription factors but may also be regulated at the post-transcriptional and chromatin levels.
2011-05-19 | GSE21480 | GEO
Project description:Seed dormancy is an adaptive trait whereby germination is blocked under favourable conditions to avoid germination out of season. Over time mature dry seeds lose dormancy and gradually acquire the capacity to germinate. Dormancy levels, i.e. the time required to release dormancy of the newly produced dry seed, are influenced by the environment of the mother plant and particularly by cold temperatures, which increase dormancy levels. It is also known that the seed coat, a maternal dead tissue, is important to keep seeds dormant over time, probably by shielding the seed living tissues from atmospheric oxygen. Biochemical and genetical evidence previously established that cold promotes polyester accumulation in the seed coat and mutant seeds deficient in polyester biosynthesis have low dormancy and viability. However, it is unclear which seed coat structures, such as apoplastic barriers, are remodeled or created de novo in response to cold during seed development. Combining histological and genetical approaches, a previously uncharacterized apoplastic barrier located in the outer integument 1 (oi1) cell layer was discovered. This barrier is strongly reinforced by cold and this process requires a MYB107 transcription factor , specifically expressed in oi1 cells. myb107 mutants is lacking the MYB107 TF, lacking the barrier and are less dormant, thus providing direct evidence that this barrier promotes dormancy in Arabidopsis.
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Project description:Winter dormancy is an adaptative mechanism that temperate and boreal trees have developed to protect their meristems against low temperatures. In apple trees (Malus domestica), cold temperatures induce bud dormancy at the end of summer/beginning of the fall. Apple buds stay dormant during winter until they are exposed to a period of cold, after which they can resume growth (budbreak) and initiate flowering in response to warm temperatures in spring. It is well-known that small RNAs modulate temperature responses in many plant species, but however, how small RNAs are involved in genetic networks of temperature-mediated dormancy control in fruit tree species remains unclear. Here, we have made use of a recently developed ARGONAUTE (AGO)-purification technique to isolate small RNAs from apple buds. A small RNA-seq experiment resulted in the identification of small RNAs that change their pattern of expression in apple buds during dormancy.
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Project description:Chinese and Philippine strains of the blood fluke Schistosoma japonicum present clear and distinctive phenotypes in areas of fecundity, pathology, drug sensitivity and immunology. Despite these differences large scale sequencing efforts have focused solely on Chinese mainland strain of the parasite. We have undertaken a comparative genomic hybridisation (CGH) approach to highlight some of the structural differences in the genome of two of the major geographical isolates of S. japonicum. We identified seven distinct regions of the S. japonicum genome that present differential CGH between Chinese and Philippine strains of the blood fluke Schistosoma japonicum, representing either deletion or duplication regions in the Philippine strain. Within these regions, genes that may be related to phenotypical differences are identified and discussed.
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Project description:We carried out the transcriptome analysis to explore expression profiles differences and identify the key genes involved in pear seed dormancy release, by comparing callery pear (Pyrus calleryana Decne) seeds at three different stages of cold stratification
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Project description:Winter survival and maintenance strategy is crucial in temperate woody plants. Here, we demonstrate novel aspects of the transcriptional regulations adopted by perennial tree species in winter/dormancy, employing a biochemical and whole transcriptome analysis. As expected, genes related to cold hardiness and defense are over-represented. Interestingly, carbohydrate biosynthesis and transport-related genes were very actively expressed in winter/dormancy. Further biochemical analyses verified the dormancy/winter transcription phenotype. Furthermore, dormancy/winter preferential expression of genes involved in the cell wall biosynthesis/modification, circadian rhythm, the indirect transcriptional regulation (RNA metabolism), and chromatin modification/remodeling were identified. Taken together, regulation of gene expression in the winter survival and maintenance may include not only controlled by promoter binding transcription factors but may also be regulated at the post-transcriptional and chromatin levels. In the first step towards the understanding of molecular mechanisms underlying the winter survival and maintenance of perennial trees, we examined the characteristics of transcription phenotype of the dormancy/winter stem compared to the active growth/summer stem by using a whole transcriptome analysis (GeneChip Poplar Genome Array; Affymetrix). Poplar Genome Array has a total of 61,251 probe sets, representing 57,423 poplar gene models, and allows us to interrogate a total of 41,558 unique gene models because of the probe set redundancy. Slight redundancy of the probe sets within a single chip gave us a unique opportunity to have internal comparisons of the particular genes. Very high reproducibility (R2 > 0.97) between the replicated samples was found. Further confirmation of the GeneChip data was made by semi-quantitative RT-PCR analysis using several genes showing the summer or winter biased expression. Based on these results, further analysis of winter stem transcriptome against summer stem was performed.
2011-05-19 | E-GEOD-21480 | biostudies-arrayexpress
Project description:Leafy spurge (Euphorbia esula) is an herbaceous perennial weed that produces vegetatively from an abundance of underground adventitious buds. The objectives of this study were to determine how mimicking natural seasonal conditions (photoperiod and temperature) under controlled environmental conditions affect dormancy and flowering competence; to determine molecular mechanisms associated with well-defined phases of seasonal dormancy transitions based on transcript profiles obtained by microarray analysis; and to link mechanisms regulating induction and release of endodormancy and flowering competence. Reduction in temperature (27 to 10°C) and photoperiod (16 to 8 h) over a three-month period induced a para- to endo-dormant transition in crown buds. An additional eleven weeks of prolonged cold (5-7°C) and short-photoperiod treatment resulted in accelerated shoot growth from crown buds, and 99% floral competence when plants were returned to growth promoting conditions. Exposure of paradormant plants to short-photoperiod and prolonged cold treatment alone had minimal affect growth potential or on flowering (~1%); whereas endodormant crown buds without prolonged cold treatment, had delayed shoot growth and approximately 2% flowering when returned to growth promoting conditions. Transcriptome analyses revealed that 373 and 260 genes were differentially expressed (p<0.005) during para- to endo-dormant and endo- to eco-dormant transitions, respectively. Transcripts from flower competent vs. non-flower competent crown buds identified 607 differentially expressed genes, and genes involved in cell cycle and DNA processing, oxidative stress, flower regulation, and proteolysis were over-represented. Further, sub-network analysis identified expression targets and binding partners associated with circadian clock, dehydration/cold signaling, phosphorylation cascades, and response to abscisic acid, ethylene, gibberellic acid, and jasmonic acid, suggesting these central regulators affect well-defined phases of dormancy. Potential genetic pathways associated with these dormancy transitions and flowering were used to develop a proposed conceptual model.
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