Ontology highlight
ABSTRACT:
PROVIDER: PRJNA743716 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR15049700_1.fastq.gz | Fastqsanger.gz | |||
| SRR15049700_2.fastq.gz | Fastqsanger.gz | |||
| SRR15049701_1.fastq.gz | Fastqsanger.gz | |||
| SRR15049701_2.fastq.gz | Fastqsanger.gz | |||
| SRR15049702_1.fastq.gz | Fastqsanger.gz |
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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:CMT-Stylo is a canine mammary gland adenocarcinoma cell line. From this cell line, a doxorubicin resistant subline called CMT-Star was developed by culturing the cells in the presence of doxorubicin from low concentration to 100 nM doxorubicin (to induce drug resistance). The CMT-Stylo cells were maintained in Dulbecco’s modified eagles medium (DMEM) supplemented with 10% Foetal bovine serum (FBS) and 1% Penicillin-Streptomycin (ThermoFisher Scientific, USA) in 5% CO2 at 370C. The CMT-Star cell line was maintained in additional 5 nM doxorubicin to maintain its resistant phenotype.
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Project description:Phosphorus (P) is an important macronutrient for plant growth that participates in a series of biological processes. Thus, P deficiency is considered as one of the major constraints limiting crop growth and yield. Although stylo (Stylosanthes) is a dominate tropical legume that displays adaptation to low phosphate (Pi) availability in acid soils, its adaptive mechanisms remain largely unknown. In this study, variation in low P stress tolerance was investigated using two stylo cultivars in hydroponics, which revealed that the stylo RY2 cultivar exhibited higher adaptability to Pi starvation than the RY5 cultivar, as reflected by less reduction in dry weight under P deficient condition, and accompanied by higher P concentrations in shoot and root. Furthermore, better root growth performance and higher APase activity were found in leaves and roots of stylo RY2 cultivar compared to RY5. RNA‐seq analysis revealed 8,348 genes that exhibited differentially expressed under P deficient and sufficient conditions in RY2 roots, with many Pi starvation up-regulated genes associated with P metabolic process, protein modification process, transport and other metabolic processes. A group of differentially expressed genes (DEGs) involved in Pi uptake and homeostasis were identified, such as genes encoding Pi transporter (PT), purple acid phosphatase (PAP), multidrug and toxin extrusion (MATE) and aluminum-activated malate transporter (ALMT). Furthermore, a variety of genes related to transcription factors (TFs) and regulators involved in Pi signaling, including genes belonging to the PHOSPHATE STARVATION RESPONSE 1-like (PHR1), WRKY family, the SYG1/PHO81/XPR1 (SPX) domain, bHLH and ARP family, were also regulated by P deficiency in stylo roots. Taken together, this study suggests a complex adaptive response of stylo to P deficiency, contributing to maintain Pi homeostasis.
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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.
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Project description:CMT-Stylo is a canine mammary gland adenocarcinoma cell line. From this cell line, a doxorubicin resistant subline called CMT-Star was developed by culturing the cells in the presence of doxorubicin from low concentration to 100 nM doxorubicin (to induce drug resistance). The CMT-Stylo cells were maintained in Dulbecco’s modified eagles medium (DMEM) supplemented with 10% Foetal bovine serum (FBS) and 1% Penicillin-Streptomycin (ThermoFisher Scientific, USA) in 5% CO2 at 370C. The CMT-Star cell line was maintained in additional 5 nM doxorubicin to maintain its resistant phenotype.
2020-12-31 | GSE114888 | GEO