Agar drying in petri dishes, why?
rpeter at nmsu.edu
Sat Oct 25 19:37:18 EST 1997
Alan S. Wicks wrote:
> I transferred some Coprinus comatus to MEA in petri dishes the other day
> (Wednesday). I wrapped the dished with Parafilm and set them on the
> bench in my lab. I looked at them this morning, Friday, and they are
> growing but the agar is cracking, even with the Parafilm seal. The
> other dishes of MEA that I didn't use are still in the transfer hood,
> with the air on, are unsealed, and are NOT cracking.
> Any ideas why or is this normal?
I don't know about Coprinus specifically, but many fungi pull a lot of
water from the agar when they grow. In many cases you see cracking agar
and condensate on the tops of the petri dishes.
* Peter Herman, Dept. of Biology Phone: +1 505 646 4532 *
* New Mexico State University Fax: +1 505 646 5665 *
* Box 30001, Dept. 3AF *
* Las Cruces, NM 88003 USA e-mail rpeter at nmsu.edu *
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