NCBI Logo
GEO Logo
   NCBI > GEO > Accession DisplayHelp Not logged in | LoginHelp
GEO help: Mouse over screen elements for information.
          Go
Sample GSM2527200 Query DataSets for GSM2527200
Status Public on May 18, 2017
Title UV_III_7
Sample type SRA
 
Source name UV_zone 3
Organism Zea mays
Characteristics cultivar: B73 inbred
exposed to: UV-B radiation
tissue: Zone 3 (2-3cm from base of the leaf)
replicate: Biological replicate 1
Treatment protocol UV treatments were done using different plastic filters to screen UV-B. Solar UV-B radiation was removed to produce the minus UV-B (Control) treatment using PE filters (100 mm clear PE plastic, Tap Plastics, Mountain View, CA). This PE filter absorbs UV-B without significantly affecting UV-A or visible radiation. To control for differences in wind or humidity under plastic sheeting, CA sheeting was used (100 mm extra clear CA plastic, Tap Plastics); the CA sheeting transmits most radiation from sunlight and is designated as the full UV treatment. For this experiment, 1 x 2 m of each plastic was draped over 0.5 x 1.4-m wooden frames that were erected outdoors; the excess plastic was stapled to the sides of the frames to reduce shading. The North and South sides were left open to allow air to circulate. However, 50-cm-long curtains with the same plastic were made on the east and west sides to avoid early morning and late afternoon UV exposure. The frames were maintained about 30 cm above the plant canopy during the experiments. Measurements of incoming UV-B radiation were recorded at noon using a UV-B/UV-A radiometer (UV203 A+B radiometer, Macam Photometrics, Ltd, Livingston, UK). The average UV-A radiation was 8 W/m2 in both groups and the average UV-B radiation was 0.35 W/m2 in the control group and 1.5 W/m2 in the UV-B exposed group. The experiment was repeated three times during the summer of 2013.
Growth protocol Maize (Zea Mays) plants from the B73 inbred were used in filed experiments during the summer 2013 in Rosario, Argentina (32º latitude),
Extracted molecule total RNA
Extraction protocol Total RNA was isolated from the first three10-mm leaf segments from the basal 30 mm of leaf 4 three days after leaf emergement, during steady-state growth, from each treatment. The TRIzol reagent (Invitrogen) was used as described in the manufacturer’s protocol. Then, 0.5 to 1.0 mg of total RNA was incubated with RNase-free DNase I (1 unit/mL) following the protocol provided by the manufacturer to remove possible genomic DNA.
Prior to library preparation the RNA quality and integrity was assessed by using a gel cartridge on a QIAxcel platform (Qiagen, Hilden, Germany). Library preparation was done using the TruSeq® Stranded mRNA sample preparation 96 rcx kit (Illumina™) following the low sample protocol according to Illumina™ guidelines. Briefly, approximately 2.5 µg of total RNA was diluted and purified using RNA purification beads targeting the poly-A tail of the mRNA and subsequently was fragmented by means of the enzymes provided in the kit. After the cDNA synthesis adenylation of 3’ ends and ligation of the adaptors were employed. Adaptors were ligated in 12-plex formations, allowing the pooling of 12 samples after the PCR enrichment of the library. Subsequently, the library was quantified using PicoGreen® dye (Life Technologies™) as described in the manufacturer’s protocol. In order to accurately quantify the concentration in nM of our pools, the Kapa SYBR® FAST universal qPCR kit (Kapa Biosystems™) for Illumina™ sequencing was used to quantify the number of the amplifiable molecules in the pools and the Bioanalyzer® (Agilent Technologies™) to determine the average fragment size of our pools. These measurements allowed optimizing the flow cell clustering and proceed with the Run. The illumina HiSeq 1500 was used in the high throughput mode together with the TruSeq® SBS Kit to sequence the samples in a 25 cycle pair-end run. Following the analysis of these runs, rapid run was performed on the samples having yielded below 5 million reads. The rapid runs were performed on the same pools as in the first sequencing round. Data from these rapid runs were added to the high throughput data.
Groups of 12 samples were pooled at equal concentrations to create eight pools for each of the lanes of the flow cell
 
Library strategy RNA-Seq
Library source transcriptomic
Library selection cDNA
Instrument model Illumina HiSeq 1500
 
Data processing Trimming of Illumina adapters (CLC Genomics Workbench v.6 )
Quality control for individual samples (CLC Genomics Workbench v.6 )
Mapping against the reference genome (CLC Genomics Workbench v.6 )
Calculation of expression values using unique matches (CLC Genomics Workbench v.6)
Normalisation by scaling 10.000.000 reads per sample
Genome_build: Zea mays (cv B73) sequence (RefGen V3; http://www.maizegdb.org)
 
Submission date Mar 09, 2017
Last update date May 15, 2019
Contact name Gerrit T.S. Beemster
E-mail(s) gerrit.beemster@uantwerpen.be
Phone +32 3 265 34 17
Organization name University of Antwerp
Department Biology
Lab Molecular Plant Physiology and Biotechnology
Street address Groenenborgerlaan 171
City Antwerpen
State/province Antwerpen
ZIP/Postal code 2020
Country Belgium
 
Platform ID GPL22940
Series (1)
GSE95858 Gene expression analysis of the effect of UV-B radiation in the growth zone of the maize leaf
Relations
BioSample SAMN06554718
SRA SRX2627993

Supplementary data files not provided
SRA Run SelectorHelp
Raw data are available in SRA
Processed data are available on Series record

| NLM | NIH | GEO Help | Disclaimer | Accessibility |
NCBI Home NCBI Search NCBI SiteMap