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Below are the four steps that were followed,
and a complete list of all the materials used in this project.
Procedure
1. RNA Extraction From Wheat Leaves
Grind about 0.5g of leaf tissue in a -20° C pre-cooled RNase-free
mortars and pestles in liquid nitrogen.
Transfer to an RNase-free container containing 1ml of Trizol per
50-100 mg of leaf tissue, transfer ground leaf and mix
thoroughly.
Transfer 1 ml of extract to RNase-free 2ml tube.
Vortex vigorously and incubate at 15-30°C for 5 minutes.
Add 500 µl of chloroform to each tube a vortex for 15 seconds.
Centrifuge at 3000 rpm (rotations per minute) at 2-8°C for 10
min.
Transfer colorless aqueous phase to new tube RNase-free 2ml
tube.
Repeat chloroform extraction one more time.
Transfer supernatant to new RNase-free 2 ml tube.
Add 500 µl Isopropanol per 1 ml Trizol in initial homogenization
step.
Incubate at 15-30°C for 10 min.
Centrifuge at 3000 rpm at 2-8°C 10 min.
Discard supernatant.
Wash RNA pellet in 1 ml of 75% ethanol.
Centrifuge at 300 rpm at 2-8°C for 10 min.
Dry briefly and re-suspend in 100 µl DEPC-treated water.
Heat at 65°C to ensure complete re-suspension.
Pool aliquots from extractions and quantify RNA. 2. Synthesizing
First Strand cDNA for Real-time PCR
Add 10X Buffer RQ1 (2 µl), DNase (5 µl), and H2O (up to 20 µl)
Incubate at 37°C for 30 min.
Add Reverse Primers 1& 2 (2 µM), 5X First Strand buffer (10
µl), DTT (5 µl), dNTPs (2.5 µl), Superscript III RT (1.0
µl), and H2O (1.5 µl)
Incubate at 50°C for 1 hour.
Store at -20°C
Collect sample 3. Real-Time PCR Set Up
Make a cocktail of H2O (10.25µl), Full Velocity (31.25µl), Forward Primer
(7.5µl)
Add Reverse Primer (7.5µl), Reference dye (1.0µl), Template (1.0µl)
Aliquot 11.5 µl into each of the 5 new tubes.
Add 1 µl of the 1/5 dilution solution.
4. Place the sample in the Real-Time PCR machine.
 Real-Time PCR Machine
Materials
Real-time Polymerase Chain Reaction (PCR) machine
Wheat samples: Norstar (winter wheat) and Manitou (spring wheat)
Taq Polymerase
Deoxy-nucleotide Triphosphates (dNTPs)
Autoclave
Rotary Shaker
Laminar Flow Hood
Mortar and pestle
Liquid nitrogen
Vortex
Centrifuge
Trizol
Diethyl Pyrocarbonate-treated water
Rnase-free 2ml, 1.5 ml, 0.5 ml tubes
Chloroform
Isopropanol
Ethanol
Reverse Primer 1 & 2 (5 µM)
5X First Strand Buffer
Dithiothreitol (DTT)
Superscript III RT
Sterilized water
Incubator
Heating cube
Pipettes
Pipette tips
Cool chamber
RNase-free water
Timer
Spatula
Reference dyes
10X Buffer RQ1
DNase
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