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Arabidopsis thaliana

ABSTRACT: Mutation detection in M1 plants after seed irradiation with gamma-rays

PROVIDER: PRJDB11954 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR307349_1.fastq.gz	Fastqsanger.gz
	DRR307349_2.fastq.gz	Fastqsanger.gz
	DRR307350_1.fastq.gz	Fastqsanger.gz
	DRR307350_2.fastq.gz	Fastqsanger.gz
	DRR307351_1.fastq.gz	Fastqsanger.gz

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Expression data from Arabidopsis leaves after gamma irradiation of 200 Gy

Project description:Arabidopsis cmt3 mutant showed neither DNA hypomethylation nor transcriptional activation of silenced repeats by gamma rays, which was found in wild type (WT). We used microarrays to compare the global transcriptional changes between the WT and cmt3 after the irradiation of 200 Gy. Transcriptions of transposition-related genes seemed to be differently affected in the WT and cmt3 by gamma rays, depending on the epigenetic codes of the genome. However, genome-wide transcriptions of the WT and cmt3 couldn't be positively correlated with the different levels of DNA methylation after the irradiation of 200 Gy. Rosette leaves from more than 10 plants were pooled for total RNA extraction and hybridization on Affymetrix Arabidopsis ATH1 genechips. We performed two independent array experiments using totally different biological replicates of WT and cmt3 mutant plants with or without gamma irradiation.

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Expression data from Arabidopsis leaves after gamma irradiation of 200 Gy

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Project description:The Cosmic Ray Exposure Sequencing Science (CRESS) payload system is a proof of concept experiment to assess the genomic impact of space radiation on seeds. CRESS was designed as a secondary payload for the December 2016 high-altitude, high-latitude, and long-duration balloon flight carrying the Boron And Carbon Cosmic Rays in the Upper Stratosphere (BACCUS) experimental hardware. Investigation of the biological effects of Galactic Cosmic Radiation (GCR), particularly those of ions with High-Z and Energy (HZE), is of interest due to the genomic damage this type of radiation inflicts. The biological effects of upper-stratospheric mixed radiation above Antarctica (ANT) were sampled using Arabidopsis thaliana seeds and were compared to those resulting from a controlled simulation of GCR at Brookhaven National Laboratory (BNL) and to laboratory control seed. The payload developed for Antarctica exposure was broadly designed to 1U CubeSat specifications (10cmx10cmx10cm, ≤1.33kg), maintained 1 atm internal pressure, and carried an internal cargo of four seed trays (about 580,000 seeds) and twelve CR-39 Solid-State Nuclear Track Detectors (SSNTDs). The irradiated seeds were recovered, sterilized and grown on Petri plates for phenotypic screening. BNL and ANT M0 seeds showed significantly reduced germination rates and elevated somatic mutation rates when compared to non-irradiated controls, with the BNL mutation rate also being significantly higher than that of ANT. Genomic DNA from mutants of interest was evaluated with whole-genome sequencing using PacBio SMRT technology. Sequence data revealed the presence of an array of genome structural variants in the genomes of M0 and M1 mutant plants.

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2 doses of ionising radiations (x-rays) -Transcriptomic analysis of effects of ionising radiation on Arabidopsis thaliana.

Project description:au09-03_gamma-irradiation - 2 doses of ionising radiations (x-rays) - Metabolic pathways involved in the response of plants to ionising radiation treatment. - Arabidopsis thaliana (Col-0) seeds were grown in Petri dishes under sterile conditions until they had 2-rosette-leaves (on average 10 days). Then they received a dose of 10 or 40 gray of X-ray (Faxitron HP). Plant were harvested 2 and 26 hours after irradiation, immediatly frozen and stored at -80°C until RNA extraction (Rneasy plant mini Kit, Qiagen) . Experiment was carried in duplicates and a non irradiated control was done for each time.

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