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Do agar plates bruise?


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#1 macgyver

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Posted 14 January 2020 - 11:13 AM

Looking at some older plates, I'm noticing a trend of blue rings/ spots in many of my plates.

To anyone experienced with agar, does this look like a contamination? Or can the mycelium bruise after a while from lack of air/nutrients?

20200114_110913.jpg 20200114_110908.jpg 20200114_110859.jpg 20200114_110850.jpg

 

 



#2 sandman

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Posted 14 January 2020 - 11:53 AM

Yes old plates bruise a little as they use up the moisture and it dries out over time.



#3 macgyver

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Posted 14 January 2020 - 01:17 PM

Yes old plates bruise a little as they use up the moisture and it dries out over time.

Ok and the bruising will look like these pictures? especially the last one?



#4 sandman

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Posted 14 January 2020 - 01:34 PM

Yea I have seen many plates bruise like that when they get old.


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