Total Plant RNA Isolation Using Trizol Reagent 1. Crush 100 mg of tissues in 1mL of triazole reagent by pestle mortar or micro pestle 1.5 or 2.0 mL RNase free Eppendorf tubes. *Incubate for 2-3 minutes at room temperature. 2. Add 200 uL chloroform and mix by gently inverting the tube. *Incubate for 2-3 minutes at room temperature. 3. Centrifuge at 12000xg at 4oC for 15 minutes. 4. Transfer the supernatant into fresh 1.5 mL RNA’s free tube. 5. Add 500 μL isopropanol mix gently by inverting the tube. *Incubate for 10 minutes at room temperature. 6. Centrifuge at 12000xg at 4oC for 10 minutes. *Discard the supernatant and keep the pallet in the tube. 7. Add 1mL of ice-chilled 75% ethanol to wash the pallet. 8. Centrifuge at 7500xg at 4oC for 5 minutes. *Discard the supernatant and keep the pallet in the tube. *Keep lid opened tube at 4oC for 15 min to air dry the pallet. 9. Add 50-100 uL RNA’s free water in pallet and mix by gentle pipetting. 10. Incubate for 10-15 m
Isolation And Purification Of Plant Pathogens-Citrus Canker Pierce the margin of an isolated canker lesion on a citrus leaf with an isolated alcohol-flamed dissecting needle. From each tomato sample select, young lesions cut out a small piece of the tissue using an alcohol-flamed sharp scalpel. Use alcohol-flamed tweezers to transfer the excised tissue into an empty Petri dish containing a 2.5 µl drop of sterile tap water. Carefully macerate the tissue using an alcohol-flamed sterile scalpel and tweezer to release the Bacteria. Use a flamed inoculating loop to transfer a small amount of the bacterial suspension onto a Petri plate containing NA Medium. Subsequently perform a quadrant streak on the plate making sure to flame and cool the inoculating loop before each streak. Label the plates with your name and sample type and place the plates upside down in the 28Ĉ incubator. Isolation And Purification Of Plant Pathogens-Citrus Canker ----------------------------------