Jan 30, 2023
RNA isolation protocol from unwilling plant tissue
- 1Universidad de Chile
Protocol Citation: Samuel Parra 2023. RNA isolation protocol from unwilling plant tissue. protocols.io https://dx.doi.org/10.17504/protocols.io.5jyl8j6n7g2w/v1
Manuscript citation:
Modified from Chang, S., Puryear, J., & Cairney, J. (1993). A simple and efficient method for isolating RNA from pine trees. Plant Molecular Biology Reporter, 11(2), 113–116. doi:10.1007/bf02670468
License: This is an open access protocol distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Protocol status: Working
We use this protocol and it's working
Created: January 30, 2023
Last Modified: January 30, 2023
Protocol Integer ID: 76076
Abstract
This protocol is intended for HIGH quality RNA extraction from plan tissues
We used this protocol after several attempts with Trizol, Qiagen RNeasy plant kit and other protocols with no ressults.
This procedure redered us between 300 to 1000 ng with good RNA
Materials
Extraction buffer:
2% CTAB (hexadecyltrimethylammonium bromide)
2% PVP (polyvinylpyrrolidinone K 30)
100 mM Tris-HCl (pH 8.0)
25 mM EDTA
2.0 M NaC1
0.5g/L spermidine
(mix and autoclave) Alt. microweave heat
2% [B-mercaptoethanol] (add just before )
Ethanol 100%
LiCl2 10M
Chloroform:IAA 24:1
1.5 mL tubes
2 mL tubes
SSTE buffer:
1M NaCl
0.5% SDS
10mM TrisHCl (pH 8)
1mM EDTA (pH 8)
RNA isolation protocol
RNA isolation protocol
This protocol is an adaptation of https://doi.org/10.1007/BF02670468 designed for extraction of RNA from pine needles with high polyphenolic compounds or high sugar content.
For all buffers use DEPC treated water or Nuclease free ddH2O
Extraction buffer:
2% CTAB (hexadecyltrimethylammonium bromide)
2% PVP (polyvinylpyrrolidinone K 30)
100 mM Tris-HCl (pH 8.0)
25 mM EDTA
2.0 M NaC1
0.5g/L spermidine
(mix and autoclave) Alt. microweave heat
2% [B-mercaptoethanol] (add just before )
Ethanol 100%
LiCl2 10M
Chloroform:IAA 24:1
1.5 mL tubes
2 mL tubes
SSTE buffer:
1M NaCl
0.5% SDS
10mM TrisHCl (pH 8)
1mM EDTA (pH 8)
Procedure, Extraction
Procedure, Extraction
For 200 mg sample use3 mL of extraction buffer.
Grind the sample with liquid nitrogen until to a fine powder. Add the 3 ml of Extraction buffer, the frozen paste will become softener in time, use the cold paste to finish grinding any remanent plant tissue.
Separate the mixture in 3 separated 2mL tubes
Keep the tubes on ice
On ice
10m
Add an equal volumen of ChCl:IAA and vortex x 30 sec
Room temperature
Extract the WHOLE aquose phase, do not leave any of it from each tube.
ignore any coloration of the aqueus phase
*Optional : Gycogen can be added at this point
Transfer the phase to 1.5 ml tubes and add 1/4 volume of 10M LiCl and mix by inverting
10m
Precipitate overnight at 4°C4 °C
Phases can be formed due to cold SDS in the buffers, ignore every phase or precipitation and go on.
12h
RNA cleaning
RNA cleaning
2h 30m
2h 30m
13000 rpm, Room temperature, 00:10:00
Centrifuge 10m at 13000 at RT, discard the liquid, mind the pellet!
10m
*If the SSTE buffer is below 25°C SDS on it will form flecks, warm untl sds is completely dissolved
Dissolve the pellet with500 µL of SSTE buffer.
Join the pellet from the 3 initial tubes using the same 500 ul of SSTE.
Extract with an equal volumen of CHCl:IAA by vortexing for 30 sec
13000 rpm, Room temperature, 00:10:00 Centrifuge at 13000 rpm x 10m at RT
10m
Recover the upper phase completely, do not leave ANY traces, a white smudge between the phases must be retrieved. dont worry if SOME chcl2 is tranfered.
Add 2 volumes of cold ETOH100% and precipitate for at least 02:00:00 at -20 °C
2h
After precipitation centrifuge at 13000 rpm, 4°C, 00:10:00
Discard the ethanol, DRY the rna pellet (might be invisible!)
Resuspend the pellet on 30-50 µL of ddH2O nuclease free or TE buffer
10m