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ABSTRACT: Long-term Impact of Nano Zero-Valent Iron

PROVIDER: PRJNA1010976 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25907234.fastq.gz	Fastqsanger.gz
	SRR25907235.fastq.gz	Fastqsanger.gz
	SRR25907236.fastq.gz	Fastqsanger.gz
	SRR25907237.fastq.gz	Fastqsanger.gz
	SRR25907238.fastq.gz	Fastqsanger.gz

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Project description:Long-term Impact of Nano Zero-Valent Iron on Transcription Activity in Anaerobic Sludge System

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Transcriptomic analysis and cellular responses to nanoscale zero-valent iron in green microalga Raphidocelis subcapitata

Project description:Nanoscale zero valent iron (nZVI) is used to remediate aquifers polluted by organochlorines or heavy metals and was also suggested to eliminate harmful algal blooms. nZVI can therefore affect microorganisms in the vicinity of the application area, including microalgae. However, studies on early transcriptomic effects of microalgae after exposure to nZVI are rare. Here, we described the early physiological and transcriptomic response of the freshwater ecological indicator green microalga, Raphidocelis subcapitata ATCC 22662, to 100 mg/L of reactive nZVI and non-reactive nano-magnetite (nFe3O4). The combined effect of shading and the release of total iron from nZVI posed a short-term inhibition effect leading to 15 % of deformed cells and cytosol leakage, while cells viability increased after 24 h. nZVI triggered a more pronounced transcriptomic response with (7380 differentially expressed genes [DEGs]) compared to nFe3O4 (4601 DEGs) after 1 h. nZVI, but not nFe3O4 increased the expression of genes function in DNA repair and replication, while deactivated carbohydrate-energy metabolisms, mitochondria signaling, and transmembrane ion transport. This study highlights an early fate assessment of algal cells under nZVI and nFe3O4 exposure using next-generation risk assessment methods and will serve as valuable information for safe and sustainable application of nZVI in water remediation.

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Project description:We report a new DSR pathway that directly generates zero-valent sulfur (ZVS) in phylogenetically diverse SRB.

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Project description:transcriptomic study of the impact of iron toxicity on rice plant (Oryza sativa L.; cv M-bM-^@M-^XI Kong PaoM-bM-^@M-^Y ) after short term (3 days) or long term (3 weeks) exposure to ferrous iron (125 ppm). Twenty five days old rice seedlings were exposed to 0 or 125 mg/L ferrous iron for 3 days and 3 weeks in hydroponic culture. Comparison between control and iron stressed plants were done at the shoot and the root levels. The assays were replicated twice on two independent plant cultures. 8 samples, Two-condition experiment, control (0 ppm ferrous iron) vs. iron treated (125 ppm ferrous iron). Biological replicates: 2 replicates for comparison shoot 3 days of stress, root 3 days of stress, shoot 3 weeks of stress and root 3 weeks of stress.

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