Extraction Protocol
1. Weight out 0.3 g of plant tissue
2. Place tissue on a clean glass slide. Chop the tissue into a paste using a clean
single edge razor blade. (we have also modified a Dremel Roto-tool for use as a
simple tissue homogenizer with good success)
3. Immediately transfer tissue to a 1.5 mL microcentrifuge tube (use Kontes
#749520-0090) and (optional) further grind tissue with a tube pestle (Kontes
#749521-1590)
4. Once the sample is prepared add 300 µL EBA, 900µl EBB, and 100 µl SDS.
5. Vortex and incubate at 65o
C for 10 min.
6. Place tube on ice and add 410 µL cold potassium acetate. Mix by inversion and
place tube back on ice for 3 min.
7. Centrifuge at 13,200 rpm for 15 min. (If possible, use a refrigerated microcentrifuge
set to 4o
C)
8. Transfer 1 mL of the supernatant to a new 1.5 mL microcentrifuge tube, add 540
µL of ice cold absolute isopropanol, and incubate in ice for 20 min.
9. Centrifuge at 10,200 rpm for 10 min. discard the supernatant. Wash the pellet
once in 500 µL 70% ethanol and let dry
10. Resuspend the dry pellet in 600 µL of TE. Add 60 µL 3M sodium acetate (pH 5.2)
and 360 µL ice cold absolute isopropanol. Incubate on ice for 20 min.
11. Repeat Steps 9−11 twice.
12. Resuspend the pellet in 50 µL TE and carry out agarose gel QC.
Agarose Gel QC
1. Cast a 1.0% (w/v) regular agarose gel in 1X TBE
2. Place 5 µL of extracted DNA and 5 µL sterile water
in a 0.2 mL microcentrifuge tube along with 2 µL of
gel tracking dye.
3. Run the gel for 20 min. at 100v.
4. Stain gel and view result.