age: 43.5day dev.stage (Boyes et al. Plant Cell 2001):boyes: 6.00-6.50
Treatment protocol
Name:Nitrogen deficiency - time course study - azote concentration,azote:. One experimental treatment was performed after the beginning of flowering: a treatment with a nitrogen deficiency. After this stage, treated plants weren’t supplied in nitrogen (without KNO3). However, a plant set was watered with the classical nutrient solution (N+) and therefore constituted a control group.
Growth protocol
caulin leaf - NA
Extracted molecule
total RNA
Extraction protocol
110_DFLO+14_Rep_N-S+_2:100mg. (Qiagen_RNeasy.pdf)
Label
Cy5
Label protocol
labelling Cy3 and Cy5 direct, amplification=yes, aRNA 5 ug. (Labelling_protocol.txt) Labelling protocol: 5 µg of aRNA (8µl) mixed with 2 µl of random nonamers 1µg/µl and 0.5 µl of RNAse Out 40 U/µl, denatured 10 min at 70 °C and chilled on ice. The followig components were added to the sample 4 µl of first strand buffer 5 X, 1 µl of 10 mM dNTP/2mM dCTP, 2 µl of 0.1 M DTT, 1.5 µl of Cy3-dCTP or Cy5-dCTP (Amersham Pharmacia Biotech, 25nmol tube, PA5502), 1 µl of SuperScript II RT 200U/µl. Then it was incubated at 42°C for 2.5 hours and chilled on ice. The sample was denaturated by adding 2 µl of NaOH 2.5M and incubated at 37 °C for exactly 15 min, then was added 10 µl of 2M MOPS and put on ice. The dyes were purified with the QIAquick PCR Purification Kit (QIAGEN).
Name:Nitrogen deficiency - time course study - azote concentration,azote:. One experimental treatment was performed after the beginning of flowering: a treatment with a nitrogen deficiency. After this stage, treated plants weren’t supplied in nitrogen (without KNO3). However, a plant set was watered with the classical nutrient solution (N+) and therefore constituted a control group.
Growth protocol
caulin leaf - NA
Extracted molecule
total RNA
Extraction protocol
152_DFLO+27_Rep_N-S+_2:100mg. (Qiagen_RNeasy.pdf)
Label
Cy3
Label protocol
labelling Cy3 and Cy5 direct, amplification=yes, aRNA 5 ug. (Labelling_protocol.txt) Labelling protocol: 5 µg of aRNA (8µl) mixed with 2 µl of random nonamers 1µg/µl and 0.5 µl of RNAse Out 40 U/µl, denatured 10 min at 70 °C and chilled on ice. The followig components were added to the sample 4 µl of first strand buffer 5 X, 1 µl of 10 mM dNTP/2mM dCTP, 2 µl of 0.1 M DTT, 1.5 µl of Cy3-dCTP or Cy5-dCTP (Amersham Pharmacia Biotech, 25nmol tube, PA5502), 1 µl of SuperScript II RT 200U/µl. Then it was incubated at 42°C for 2.5 hours and chilled on ice. The sample was denaturated by adding 2 µl of NaOH 2.5M and incubated at 37 °C for exactly 15 min, then was added 10 µl of 2M MOPS and put on ice. The dyes were purified with the QIAquick PCR Purification Kit (QIAGEN).
Hybridization protocol
110_DFLO+14_Rep_N-S+_2 Cy5 / 152_DFLO+27_Rep_N-S+_2 Cy3 : 30pmol. (Hybridization_Protocol.txt) Hybridization Protocol: CATMA slides (Corning Microarray Technology, CORNING) are pretreated in the prehybridisation solution (1 % BSA, 0.1 SDS, 5X SSC ) at 42°C for 60 min. They are dipped a couple of times in distilled water at room temperature, then in isopropanol and dried immediately by compressed nitrogen stream. Slides were placed in Corning hybridization chambers with a 25x60 lifterslip and 10ul of distilled water for each groove. The target was diluted to a final volume of 60 µL as follows 15µl of purified, labeled cDNA, 15 µl of 4X Hybridization Buffer ( 20X SDS, 0.4 % SDS), 30 µL formamide. The target mixture is heated for 3 min at 95°C, put on ice for 30 sec and centrifuged to remove dust for 1 min. The target mixture was put on the chip as quickly as possible. The microarray is sealed in a chamber and submerged in a 42°C water bath for approximately 16 h. The microarray is washed for 4 min in 1xSSC, 0.2% SDS (42°C); 4 min in 0.1x SSC, 0.2% SDS (RT); 4 min in 0.1x SSC, 0.2% SDS (RT); 4 min in 0.1x SSC (RT); dipped a few times in distilled water and dried immediately by compressed nitrogen stream.
Scan protocol
Mapix, Cy3:pmt voltage 532nm,480V,laser power 35%, Cy5:635nm,pmt voltage 480V,laser power 30%
Description
Transcriptome in leaves of Pea plants during the remobilization process . Effect of a nitrogen deficiency on this process.Note that lower leaves correspond to vegetative leaves (FV) and upper leaves correspond to leaves of the reproductive part (FR).
Data processing
For each array, the raw data comprised the logarithm of median feature pixel intensity at wavelengths Cy5 (red) and Cy3 (green).For each array, a global intensity-dependent normalization using the loess procedure (Yang et al., 2002) was performed to correct the dye bias.Log-ratios are then averaged over the duplicate probes to get a value per gene.
