Cloning From Dried Tissue
Posted 01 September 2008 - 12:49 PM
If you have good sterile technique, cloning from dried material is a cinch.
I started with an X style petri dish.
One section is poured with gentamycin agar
The other three poured with standard agar prepared in the usual fashion.
I did this two different ways in order to demonstrate just how easy this is.
First, I've selected material from a gourmet sample which was stored in a plastic print baggie and shipped.
During transit the bag was ruptured, the sample squeezed out into the envelope, and the sample seemingly destroyed.
Samples of this material were rescued - as cleanly as possible - and transferred to the gentamycin section of the plates.
New, clean growth was observed after only two days.
So now let's try this with a dried fruitbody sample.
This fruitbody is known to be at least one year old. Was stored in a tool box in a garage and forgotten about. Has been handled many times with no aseptic considerations at all. Sample was returned to the lab for experimentation.
First, I split the sample as best I could.
Material was selected from the cap area. I tried to get material that had previously not been exposed to open air.
Select a tiny sample and transfer to gentamycin agar.
Seal plates with parafilm and incubate
Note the blueing of the transfer as it rehydrates on the agar!
In this manner, dried mycelial tissue can be revived with ease.
I've also done this with culture plates which dried out during storage under refrigeration with excellent results. In the case where sterile tissue is being revived, the gentamycin agar is not necessary.
I hope this helps with your rescue efforts.
- Om shanti, Tenderfoot, Salem and 2 others like this
Posted 01 September 2008 - 01:03 PM
Really needing to do this. For saving redboy ... i'm down to tiny dried mushrooms.
Posted 06 September 2008 - 10:35 AM
Mycelial revivification after 6 days on standard (gent.) agar
From a one + year old, man-handled, filthy specimen.
Tell me that Fungi aren't survivors!!!
DAMN! Talk about will to live!
- Traderkain likes this
Posted 06 September 2008 - 12:45 PM
I'll have to file this for later reference.
Posted 08 September 2008 - 04:49 AM
Posted 08 September 2008 - 09:49 AM
At 85F on agar, I had fresh growth on the first plate within 3 days and all of them within 6. Once it got started, the myc growth was perfectly normal - but they do start kind of slow. Really mashing the tissue down into the agar seems to help a little.
I believe this technique can be used with virtually any kind of mushroom.
Posted 09 September 2008 - 11:43 AM
Posted 09 September 2008 - 12:06 PM
Posted 09 September 2008 - 08:08 PM
Nice write up Myc.Do you think I could transfer to an LC as well?I'm going to try this with a LC as soon as it cools down.
If your sterile technique is really good, you might get away with it.
Part of the purpose of using agar is identifying any contams on the flat surface. Myc grows very quickly and you can cut healthy growth out to start a new plate, usually leaving the contams behind (though sometimes you have to transfer again).
- Traderkain likes this
Posted 15 September 2008 - 03:03 PM
I actually took four transfers.
Two were laid on top of the agar and gently pressed into the surface. Both of these specimens are growing fine.
Two were thouroughly mashed into the agar. These two specimens failed to take off. I'm still going to experiment further and see if a transfer will cause them to grow.
As for transfer to LC, I think BB said it best.
You'll have to be very meticulous.
If you can't work with agar, I would at least add gentamycin to the LC to give a greater chance of success. Never added gent to LC but it makes sense that it would work.
- -=Zeus=- and Traderkain like this
Posted 15 September 2008 - 07:12 PM
And I'm sorry if I misled you with "mash the tissue down" onto the agar. You want some pressure, so it gets good contact and rehydrates, but you don't want to force it down into the agar. I'm not sure why, but the really squished down tissue didn't grow well for me either (which is odd, I thought that would be better).
Just don't "perch" the tissue on the agar - it needs some solid contact with the agar or it won't rehydrate and start growing again.
Hmmm - just thought - maybe swab the dry tissue against the condensation in the edges of the plate cover? That condensation should be sterile.
There have been some term 10 and 20 year studies on reanimating dehydrated tissue from other mushrooms; very high success rates. I think it is a good way to store strains.
- Traderkain likes this
Posted 03 May 2009 - 02:35 AM
Posted 03 May 2009 - 12:00 PM
Posted 23 October 2009 - 10:40 PM
Posted 24 October 2009 - 06:30 AM
Nice myc, it works ^^