The small RNA component of Arabidopsis phloem sap and its response to iron deficiency.
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA925510 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR23126039.fastq.gz | Fastqsanger.gz | |||
| SRR23126040.fastq.gz | Fastqsanger.gz | |||
| SRR23126041.fastq.gz | Fastqsanger.gz | |||
| SRR23126042.fastq.gz | Fastqsanger.gz | |||
| SRR23126043.fastq.gz | Fastqsanger.gz |
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Similar Datasets
Project description:We performed small RNA-seq (sRNA-seq) study of Arabidopsis phloem sap under iron-sufficient (+Fe; control) and iron deficient (-Fe) conditions to investigate and identify sRNAs whose expression is regulated by iron deficiency in the phloem sap.
2023-08-08 | GSE223278 | GEO
Project description:The objective of this study was to identify nutrient-responsive small RNAs in different tissues and in phloem sap of rape plants. miRNA microarrays containing all currently known plant miRNAs (Sanger miRBase versions 10.0, 10.1 and 11.0), and a set of unknown small RNAs cloned earlier from Brassica phloem sap (Bn_PsRNA) were used. The phloem, leaf and root response to nutrient deficiency were analyzed by removing either sulfate, copper or iron from the growth medium. The small RNA profile from phloem and inflorescence stems of plants grown under full nutrition conditions was also analyzed and compared. The study demonstrates that the phloem sap sRNA profile is distinct from that of the inflorescence stems, leaves and roots. Furthermore, we could identify phloem-enriched small RNAs and showed that some of them specifically accumulate in the phloem in response to nutrient deprivation.
2010-02-24 | GSE20263 | GEO
Project description:In order to discover sRNA that might function during iron deficiency stress, RNA was prepared from phloem exudates of Arabidopsis thaliana, and used for RNA-seq. Bioanalyzer results indicate that abundant RNA from phloem is small in size-less than 200 nt. Moreover, typical rRNA bands were not observed. Sequencing of eight independent phloem RNA samples indicated that tRNA-derived fragments, specifically 5' tRFs and 5' tRNA halves, are highly abundant in phloem sap, comprising about 46% of all reads. In addition, a set of miRNAs that are present in phloem sap was defined, and several miRNAs and sRNAs were identified that are differentially expressed during iron deficiency.
| S-EPMC10421156 | biostudies-literature
Project description:This sudy focuses on the identification of transcripts in the shoot phloem of the model plant Arabidopsis thaliana. Transcripts expressed in the phloem tissue (parenchyma cell, companion cell, sieve element) were excised by laser microdissection pressure catapulting (LMPC). These were compared with transcripts isolated from leaf phloem exudates by EDTA-chelation technique. Optimization of sample harvest resulted in RNA of high quality from both sources. Modifications of the RNA amplification procedure obtained RNA of sufficient yield and quality for microarray experiments. Microarrays (Affymetrix, ATH1) hybridized with RNA derived from phloem tissue by LMPC or phloem sap allowed us to differentiate between phloem located and mobile transcript species. The datasets provide a search criterion for phloem-based signals and will facilitate reverse genetic studies and forward genetic screens for phloem and long distance RNA signaling mutants. Keywords: profiles of mobile and stationary Arabidopsis phloem transcripts
2008-09-01 | GSE10247 | GEO
Project description:This sudy focuses on the identification of transcripts in the shoot phloem of the model plant Arabidopsis thaliana. Transcripts expressed in the phloem tissue (parenchyma cell, companion cell, sieve element) were excised by laser microdissection pressure catapulting (LMPC). These were compared with transcripts isolated from leaf phloem exudates by EDTA-chelation technique. Optimization of sample harvest resulted in RNA of high quality from both sources. Modifications of the RNA amplification procedure obtained RNA of sufficient yield and quality for microarray experiments. Microarrays (Affymetrix, ATH1) hybridized with RNA derived from phloem tissue by LMPC or phloem sap allowed us to differentiate between phloem located and mobile transcript species. The datasets provide a search criterion for phloem-based signals and will facilitate reverse genetic studies and forward genetic screens for phloem and long distance RNA signaling mutants. Experiment Overall Design: Arabidopsis plants were cultivated under short day conditions (8 h light) until flowering. Phloem tissue was isolated by Lasermicrodissection and Pressure Catapulting (LMPC) and phloem exudate by EDTA-chelation technique. In both experiments poly-A-RNA was extracted and amplified before hybridization of microarrays (Affymetrix, ATH1). For both experiments three LMPC-derived phloem tissue (LMPC-derived phloem_1-3) and three phloem exudate samples (Phloem exudate_1-3) were analysed. Precise protocols of plant growth, sample harvest, RNA extraction and amplification are provided in Deeken et al., 2008.
2008-10-25 | E-GEOD-10247 | biostudies-arrayexpress
Project description:Primary objectives: To evaluate the effect of iron therapy on platelet counts in patients with colorectal cancer and iron deficiency
Primary endpoints: drop in platelet counts>10%
| 2531118 | ecrin-mdr-crc
Project description:To better understand the function of the phloem in plants, we have combined laser capture microdissection (LCM) and RNA-seq for an in-depth transcriptional profile of phloem-associated cells of both petioles and stems of potato. Out of the 27k transcripts assembled that we identified, approximately 15K were present in phloem-associated cells of petiole and stem with greater than ten reads. Approximately 22% of the transcripts in phloem cells contained at least one binding motif for Pumilio, Nova, or polypyrimidine tract-binding proteins in their downstream sequences. Highlighting the predominance of binding processes identified in the gene ontology analysis of active genes from phloem cells, 78% of the 464 RNA-binding proteins present in the potato genome were detected in our phloem transcriptome. As a reasonable alternative when phloem sap collection is not possible, LCM can be used to isolate RNA from specific cell types, and along with RNA-seq, provides practical access to expression profiles of phloem tissue.
2015-08-02 | E-MTAB-4251 | biostudies-arrayexpress
Project description:This SuperSeries is composed of the following subset Series:; GSE10496: Expression analysis of the effect of protoplasting and FACS sorting in roots exposed to iron deficiency (-Fe); GSE10497: Expression analysis of root developmental zones after iron deficiency (-Fe) treatment; GSE10501: Expression analysis of root cell-types after iron deficiency (-Fe) treatment; GSE10502: Time course expression analysis of the iron deficiency (-Fe) response in Arabidopsis roots Experiment Overall Design: Refer to individual Series
2008-06-11 | E-GEOD-10576 | biostudies-arrayexpress
Project description:Phloem is the primary conduit through which photosynthates, hormones, and other biologically important molecules are distributed from aerial plant organs downward and throughout the plant. Increasing evidence suggests that phloem contents are diverse and play a critical role in biotic and abiotic stress adaptation. Drought causes the greatest decreases in agricultural crop productivity among all biotic and abiotic stresses, and the link between water deficiency and phloem protein contents is relatively unexplored. Here we employed the EDTA-facilitated phloem exudate collection method from Solanum lycopersicum leaves during a period of drought stress and recovery. Our analysis resulted in the confident identification and quantification of 2,558 proteins. Comparing our data with previous findings confirms that our exudate collection strategy enriched for known phloem proteins. Independent of drought, enrichment analysis of the total phloem exudate protein profiles from all samples suggest that the exchange of proteins into the phloem is more complex than previously thought, including additional protein chaperone systems, branched-chain amino acid synthesis proteins, trehalose metabolism, and RNA silencing proteins. During the experiment we observed 169 proteins whose abundance changed significantly within the phloem sap, the majority of which were impacted specifically in response to drought. Among these were proteins involved in lipid metabolism, chaperone-mediated protein folding, carboxylic acid metabolism, abscisic acid signaling, cytokinin biosynthesis, and amino acid metabolism are significantly upregulated during drought. Conversely, proteins involved in lipid signaling, sphingolipid metabolism, cell wall organization, carbohydrate metabolism, and a mitogen-activated protein kinase are downregulated in response to drought. Many of these observations are consistent with previous literature findings at the whole plant level but have not been localized to the vasculature in tomato, suggesting phloem plays a critical role in adaptation to drought stress in tomato .
2020-06-26 | PXD018993 | Pride
Project description:Iron plays the central role in the oxygen transport by the erythrocyte as a constituent of heme and hemoglobin. The importance of iron and heme also resides in their regulatory roles during erythroblast maturation. The transcription factor Bach1 may be involved in their regulatory roles since it is inactivated by direct binding of heme. To address whether Bach1 is involved in the responses of erythroblasts to iron status, low iron conditions that induced severe iron deficiency in mice were established. Under iron deficiency, extensive gene expression changes and mitophagy disorder were induced during maturation of erythroblasts. Bach1 mice showed more severe iron deficiency anemia in the developmental phase of mice and a retarded recovery once iron was replenished when compared with wild-type mice. In the absence of Bach1, the expression of globin genes and Hmox1 (encoding heme oxygenase-1) was de-repressed in erythroblasts under iron deficiency, suggesting that Bach1 represses these genes in erythroblasts under iron deficiency to balance the levels of heme and globin. Moreover, an increase in genome-wide DNA methylation was observed in erythroblasts of Bach1–/– mice under iron deficiency. These findings reveal the principle role of iron as a regulator of gene expression in erythroblast maturation and suggest that the iron-heme-Bach1 axis is important for a proper adaptation of erythroblast to iron deficiency to avoid toxic aggregates of non-heme globin.
2016-12-14 | GSE78955 | GEO