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Sample GSM184552 Query DataSets for GSM184552
Status Public on Dec 19, 2007
Title Whole roots 2hr KCl control treated then incubated in protoplast-generating solution minus enzymes, biological rep2
Sample type RNA
Source name 12 day old Arabidopsis roots, 2hr KCl control treated then incubated in protoplast-generating solution minus enzymes
Organism Arabidopsis thaliana
Characteristics Genotype: Col-0
All root cells
Biomaterial provider Col-0 (Lehle Seeds)
Treatment protocol At dawn on 12th day plants were either transitory/continuous nitrogen-treated (KNO3 to 5mM added) or KCl treated (KCl to 5mM added) as a control treatment for 2 hrs. To isolate single cell types (LRC, EpiC, EndoP, Peri, Stele) cells were incubated in a solution containing cell-wall digesting enzymes and then Fluorescence Activated Cell Sorting (FACS) sorted as Birnbaum et al (2005) Nature Methods 2: 615-619. To isolate mock FACS-sorted protoplasts the same proceedure was followed but the cells were not FACS-sorted, instead the protoplasts were incubated on ice for the time it takes to FACS-sort (1 hour). After FACS or mock-FACS cell sorting cells were frozen using liquid nitrogen. 5mM KNO3 was either maintained in the protoplast-generating solution (continuous treat) or not (transitory treat) to test how to best preserve the cellular nitrogen-response during the 1 hr protoplast generating procedure. As well as the 'protoplasts' controls we harvested whole roots that were either frozen using liquid nitrogen directly after the 2hr treatment or 3.5hr treatment, or whole roots incubated in protoplast-generating solultion (minus enzymes; transitory or continuous treated) and then frozen. 1mM MSX in combination with 5mM KNO3 (or with 5mM KCl as a control), or also with 5mM glutamine (Gln) for 2 hrs was used to block and then release the block of the assimilation of KNO3 in order to seperate KNO3 effects from assimilated-nitrogen effects in FACS-sorted pericycle cells.
Growth protocol Plants were grown for 12 days in long day (16hr light/8hr dark) 22 oC conditions in a Percival (Percival Scientific). Plants were grown hydroponically in basal MS containing no nitrogen except 0.5mM ammonium succinate and 3mM sucrose. All plant lines are in the Col-0 background.
Extracted molecule total RNA
Extraction protocol Total RNA was either extracted using the Plant RNAeasy kit (Qiagen, Hilden, Germany) for cell samples (LRC, EpiC, EndoP, Peri, Stele, Protoplasts), or for whole root samples using TRIzol reagent (Invitrogen, Carlsbad, CA). Protocols were followed according to manufacturer's instructions.
Label biotin
Label protocol Biotinylated cRNA from all isolated cell samples (LRC, EpiC, EndoP, Peri, Stele) were prepared according to the standard two-cycle Affymetrix protocol from 50 ng total RNA, or from all whole root samples and protoplast samples according to the standard one-cycle Affymetrix protocol from 1 ug total RNA.
Hybridization protocol Following fragmentation, 8 ug of cRNA were hybridized for 16 hr at 45C on an Affymetrix ATH1 GeneChip Arabidopsis Whole Genome Array in the Affymetrix Hybridization oven 640 following standard Affymetrix protocol. GeneChips were washed and stained using the 'EukGE-WS2v4_450' protocol in the Affymetrix GeneChip Fluidics Station 450.
Scan protocol GeneChips were scanned using the Affymetrix GeneChip 3000 Scanner according to standard Affymetrix protocols.
Description n/a
Data processing The data were analyzed with dChip using dChip default analysis settings and 'Average' as the normalization model, PM match only. Note that samples were normalized in two batches according to the sample type: Cell type specific samples (columns B-BC), and protoplasts and whole roots (columns BD-CG), all using the procedure described above. Non nuclear-encoded or ambiguous probe-gene matches were not used (according to latest annotation file from Affymetrix (April 2007). If the signal was log2 less than 6 in both treat and control experiments probes were removed from analysis; the value of 6 based on expression values of previously documented cell-specific genes. Probes determined to be affected by protoplast generation procedure were not analysed.
Submission date Apr 26, 2007
Last update date Aug 28, 2018
Contact name Kenneth David Birnbaum
Phone 212-998-8257
Organization name New York University
Department Biology
Lab Birnbaum
Street address 12 Waverly Place
City New York
State/province NY
ZIP/Postal code 10003
Country USA
Platform ID GPL198
Series (1)
GSE7631 Cell-specific nitrogen responses in the Arabidopsis root
Reanalyzed by GSE119083

Data table header descriptions
VALUE dChip.2006 log2 normalized signal value

Data table
AFFX-BioB-5_at 6.65
AFFX-BioB-M_at 7.162
AFFX-BioB-3_at 7.116
AFFX-BioC-5_at 7.673
AFFX-BioC-3_at 7.402
AFFX-BioDn-5_at 6.907
AFFX-BioDn-3_at 9.451
AFFX-CreX-5_at 10.669
AFFX-CreX-3_at 11.294
AFFX-DapX-5_at 5.196
AFFX-DapX-M_at 5.944
AFFX-DapX-3_at 5.594
AFFX-LysX-5_at 4.354
AFFX-LysX-M_at 5.678
AFFX-LysX-3_at 6.134
AFFX-PheX-5_at 5.269
AFFX-PheX-M_at 6.02
AFFX-PheX-3_at 5.603
AFFX-ThrX-5_at 6.224
AFFX-ThrX-M_at 5.377

Total number of rows: 22810

Table truncated, full table size 356 Kbytes.

Supplementary file Size Download File type/resource
GSM184552.CEL.gz 2.2 Mb (ftp)(http) CEL
GSM184552.EXP.gz 282 b (ftp)(http) EXP
Processed data included within Sample table

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