C.elegans transcriptomic response to Mn exposure
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ABSTRACT:
PROVIDER: PRJEB52734 | ENA |
REPOSITORIES: ENA
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Project description:Despite its necessity, manganese (Mn) can causes phytotoxicity when present in excess. Stylo (Stylosanthes) is a dominant tropical legume with high Mn adaptability, but its Mn tolerance mechanisms are not well documented. This study integrated both physiological and transcriptome analyses of stylo in response to excess Mn toxicity. Results showed that stylo growth was decreased by excess Mn higher than 200 µM, as reflected by reductions in leaf chlorophyll and plant dry weight. Increases in enzyme activities of peroxidase (POD), ascorbate peroxidase (APX) and phenylalanine ammonia-lyase (PAL) and concentrations of secondary metabolites, including total phenols, flavonoids, tannins and anthocyanidins, were observed in stylo leaves at high Mn stress. Transcriptome analysis in stylo leaves resulted in identification of 2,471 up-regulated and 1,623 down-regulated genes under excess Mn toxicity. Among them, a set of differentially expressed genes (DEGs) involved in secondary metabolism, including PAL, chalcone synthase (CHS), chalcone isomerase (CHI) and flavonol synthase (FLS), were up-regulated in stylo under Mn toxicity, which were closely associated with the accumulation of secondary metabolites, suggesting that activation of secondary metabolism and corresponding gene expression might be important for stylo adaptation to Mn toxicity. Furthermore, a group of DEGs encoding transcription factors, such as genes belonged to C2H2 zinc finger transcription factor, WRKY, MYB and AP2 family, may be involved in stylo responses to Mn toxicity. Taken together, this study suggests that enhancing defense response and secondary biosynthesis pathway is adaptive strategy of stylo during Mn exposure, which might be regulated by complex transcriptional regulatory networks.
2020-12-08 | GSE147431 | GEO
Project description:The aim of this work was to study the effects of Fe and Mn deficiencies and Mn toxicity on the protein profile of the root of tomato (Solanum lycopersicum), with the aim of elucidating plant response mechanisms to these nutritional stresses. Tomato was chosen as a model plant because the tomato genome has been published. The high-throughput shotgun analysis has permitted to identify and quantitate a large number of low abundance proteins in the tomato root. Protein identification was carried out using the Mascot search engine and the non-redundant databases NCBInr and ITAG v2.3.
2018-08-06 | PXD008326 | Pride
Project description:The aim of this work was to study the effects of Fe and Mn deficiencies and Mn toxicity on the protein profile of the xylem sap of tomato (Solanum lycopersicum), with the aim of elucidating plant response mechanisms to these nutritional stresses. Tomato was chosen as a model plant because the tomato genome has been published and this plant species has adequate root pressure and turgid stems that permit xylem sap sampling in sufficient amounts by de-topping. The high-throughput shotgun analysis has permitted to identify and quantitate a large number of low abundance proteins in the tomato xylem sap.
2017-11-30 | PXD007517 | Pride
Project description:Chlamydia psittaci MN strain:MN Genome sequencing
| PRJNA171914 | ENA
Project description:Chlamydia psittaci MN strain:MN Genome sequencing
| PRJNA186625 | ENA
Project description:The effect of microgravity on gene expression in C.elegans was comprehensively analysed by DNA microarray. This is the first DNA microarray analysis for C.elegans grown under microgravity. Hyper gravity and clinorotation experiments were performed as reference against the flight experiment.
2012-03-31 | GSE36358 | GEO
Project description:Manganese (Mn), an essential element for plants, can be toxic when present in excess. Stylo (Stylosanthes) is a pioneer tropical legume with great potential for Mn tolerance, but its Mn tolerance mechanisms remain poorly understood. In this study, the mechanisms underlying stylo response to Mn toxicity were investigated using two stylo genotypes with contrasting Mn tolerance. Results showed that stylo genotype RY5 exhibited Mn tolerance superior to that of genotype TF2001, showing lower reductions in leaf chlorophyll concentration, maximum quantum yield of photosystem II (Fv/Fm) value and plant dry weight under Mn toxicity. Furthermore, RY5 tolerance to Mn toxicity could be attributed to stimulation of antioxidant protection and regulation of Mn homeostasis. Subsequently, a label-free quantitative proteomic analysis was conducted to investigate the protein profiles in the leaves and roots of stylo in response to Mn toxicity. A total of 356 differentially expressed proteins (DEPs) were identified, including 206 proteins from leaves and 150 proteins from roots, which consisted of 71 upregulated, 62 downregulated, 127 strongly induced and 96 completely suppressed proteins. These DEPs were mainly involved in defense response, photosynthesis, carbon fixation, metabolism, cell wall modulation and signaling. The qRT-PCR analysis verified that 10 out of 12 corresponding gene transcription patterns correlated with their encoding proteins after Mn exposure. Furthermore, stylo plants coped with Mn toxicity may be through enhancement of defense response and phenylpropanoid pathway, adjustment of metabolic process, and modulation of protein synthesis and turnover. Taken together, this study increases our understanding of tropical legume responses to Mn toxicity.
2019-05-06 | PXD012379 | Pride
Project description:The goal of this study is to find skate pectoral fin motor neuron markers. Total RNA was extracted from manually sorted pectoral fin MNs, which were retrogradely labeled and tail spinal cord cells. By comparing RNA expression profiles of pectoral fin MNs and tail spinal cord neurons, we could identity general MN, MN columnar, and subset MN pool markers for fin MNs.
2018-02-08 | GSE105156 | GEO
Project description:Liquid cultures of the unicellular green alga, Chlamydomonas reinhardtii were grown in media with 6 uM Mn (control) or 1000 uM Mn (experimental), and analyzed by RNA-Seq to identify genes that are differentially expressed in response to excess Mn.
2022-03-25 | GSE169756 | GEO
Project description:Exposure of adult humans to manganese (Mn) has long been known to cause neurotoxicity. Recent evidence also suggests that exposure of children to Mn is associated with developmental neurotoxicity. Astrocytes are critical for the proper functioning of the nervous system, and they play active roles in neurogenesis, synaptogenesis and synaptic neurotransmission. In this report, to help elucidate the molecular events underlying Mn neurotoxicity, we systematically identified the molecular targets of Mn in primary human astrocytes by using microarray gene expression profiling and computational data analysis algorithms. We found that Mn altered the expression of diverse genes ranging from those encoding cytokines and transporters to signal transducers and transcriptional regulators. Particularly, 28 genes encoding proinflammatory chemokines, cytokines and related functions were up-regulated whereas 15 genes encoding functions involved in DNA replication and repair and cell cycle checkpoint control were down-regulated. These results are further supported by data from real-time RT-PCR, Western blotting and flow cytometric analyses. In addition, analysis of common regulators revealed that 16 targets known to be positively affected by the IFN-gamma signaling pathway were up-regulated by Mn, suggesting that the proinflammatory IFN-gamma signaling pathway was likely activated. These results raise the possibility that inflammatory activation of astrocytes and the increased expression of proinflammatory cytokines and chemokines and/or the activation of related signaling pathways might be an important mechanism leading to Mn neurotoxicity. Keywords: treatment comparison
2007-06-14 | GSE5079 | GEO