Overexpression of a Medicago truncutula homeodomain finger protein, MtPHD6, enhances drought tolerance in Arabidopsis
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ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
PROVIDER: GSE134945 | GEO | 2020/01/08
REPOSITORIES: GEO
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2017-06-13 | GSE93979 | GEO
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2018-03-02 | GSE101699 | GEO
Project description:Purpose: We aimed to dissect transcriptomic responses of Tulipa gesneriana during petal senescence and characterize function of senescence related genes. Methods: A total amount of 3 µg RNA was used for generation of sequencing libraries using NEBNext® Ultra™ RNA Library Prep Kit for Illumina® (NEB, USA) following manufacturer’s recommendations and index codes were added to attribute sequences to each sample. After cluster generation, the library preparations were sequenced on an Illumina Hiseq platform and 125 bp/150 bp paired-end reads were generated. Clean reads were obtained by removing low quality reads, reads containing adapter and ploy-N from raw data. At the same time, Q20, Q30 and GC content the clean data were calculated. Index of the Arabidopsis genome was built using Bowtie v2.2.3 and paired-end clean reads were aligned to the reference genome using TopHat v2.0.12. HTSeq v0.6.1 was used to count the reads numbers mapped to each gene. And then FPKM (Fragments Per Kilobase of transcript sequence per Millions base pairs sequenced) of each gene was calculated based on the length of the gene and reads count mapped to this gene. Differential expression analysis between each two different stages was performed using the DESeq R package (1.18.0). Results:In total, 15 samples with three biological replicates per stage combination were used for RNA sequencing analysis. At least 6 G clean bases were generated for each sample. Comparative analysis identified genes involved in flower development and/or fllower senescence.
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2022-11-01 | GSE140362 | GEO
Project description:Purpose: To obtain an overview of the metabolic changes associated to the absence of KpsM in Synechocystis, in particular on carbon-related metabolic pathways Methods: The trancriptomes of Synechocystis wild type and kpsM mutant were analyzed by RNA sequencing, using three biological replicates. Cultures were grown until reaching an OD730nm of 1.5. Sequencing libraries were generated using NEBNext® Ultra TM RNA Library Prep Kit for Illumina®. PCR products were purified (AMPure XP system) and library quality was assessed on the Agilent Bioanalyzer 2100 system. The clustering of the index-coded samples was performed on a cBot Cluster Generation System using PE Cluster Kit cBot-HS (Illumina). Raw data (raw reads) of FASTQ format were firstly processed through in-house scripts. In this step, clean data (clean reads) were obtained by removing reads containing adapter and poly-N sequences and reads with low quality from raw data. Paired-end clean reads were mapped to the reference genome using HISAT2 software.HTSeq was used to count the read numbers mapped of each gene, including known and novel genes. And then RPKM of each gene was calculated based on the length of the gene and reads count mapped to this gene. RPKM, Reads Per Kilobase of exon model per Million mapped reads, considers the effect of sequencing depth and gene length for the reads count at the same time, and is currently the most commonly used method for estimating gene expression levels. Differential expression analysis between two conditions/groups (three biological replicates per condition) was performed using DESeq2 R package. DESeq2 provides statistical routines for determining differential expression in digital gene expression data using a model based on the negative binomial distribution. The resulting P values were adjusted using the Benjamini and Hochberg’s approach for controlling the False Discovery Rate (FDR). Genes with an adjusted P value < 0.05 found by DESeq2 were assigned as differentially expressed. Results: Approximately 700 genes (out of the 3636 identified and 215 quantified, representing a coverage of 85,12%) were significantly differentially expressed (P 216 value < 0.05) in the kpsM mutant compared to the wild type. Of those, 406 were down217 regulated, while 297 were up-regulated. Conclusions: Overall, our transcriptomic data indicates alterations in the mechanisms of energy production and conversion in the kpsM mutant compared to the wild type. The approach resulted in the identification of altered levels of transcripts belonging to a variety of functional categories and highlighting a number of key metabolic processes affected by the disruption of kpsM, namely photosynthesis, oxidative phosphorylation and carbon metabolism.
2021-01-20 | GSE165073 | GEO
Project description:Purpose: We aimed to dissect response of Perennial_ryegrass to drought, heat and cold stresses and identify stress responsive genes in Perennial_ryegrass. Methods: The sequencing libraries was constructed using NEBNext® UltraTM RNA Library Prep Kit for Illumina®, sequenced on an Illumina Hiseq platform and 125 bp/150 bp paired-end reads were generated. Clean data (clean reads) were obtained after removing reads containing poly-N or adapter, and low quality reads from raw data. Transcriptome assembly was accomplished based on the left.fq.gz and right.fq.gz using Trinity. Gene function was annotated based on the following databases: NR (NCBI non-redundant protein sequences), Pfam (Protein family), KOG/COG/eggNOG (Clusters of Orthologous Groups of proteins), Swiss-Prot (A manually annotated and reviewed protein sequence database), KEGG (Kyoto Encyclopedia of Genes and Genomes) and GO (Gene Ontology). Differential expression analysis of two groups was performed using the DESeq R package (1.10.1). Genes with an adjusted P-value<0.05 and fold change>2 found by DESeq were assigned as differentially expressed. Results:In total, four samples with two biological replicates per genotype/treatment combination were used for RNA sequencing analysis. At least 5 G clean bases were generated for each sample.After sequencing quality control, a total 137822219 clean reads and 41.05 G clean bases were generated. The Q30 base percentage of each sample was higher than 91.0% (Table S1). A total of 32840 unigenes were obtained after transcriptome assembly. Comparative analysis identified genes modulated by drought, heat and cold stresses
2020-11-08 | GSE141654 | GEO