Lichen Placopsis gelida

Images made through a microscope. All subject types.

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ralfwagner
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Lichen Placopsis gelida

Post by ralfwagner »

Hello,

this lichen was found by my wife during her Iceland holiday. Location was near Selfoss, substrate was lava.
Placopsis gelida is a crustose lichen, characterized by pale orange cephalodia in the center of the thallus. Cephalodia contain a second photobiont, in this case the cyanobacterium Stigonema. The other photobiont, situated in the lobes, is a coccoid green algae.

Closeup thallus:
Image

Section cephalodium:
Image

Section lobe, LCB stain:
Image

Section cephalodium, darkfield:
Image

Section cephalodium, polarized light:
Image
Last edited by ralfwagner on Wed Sep 26, 2018 10:46 am, edited 1 time in total.

Lou Jost
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Post by Lou Jost »

Very nice. How do you get them off the substrate without breaking them?

Jacek
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Post by Jacek »

Very nice

vasselle
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Post by vasselle »

Bonjour
Very nice
Cordialement seb
Microscope Leitz Laborlux K
Boitier EOS 1200d

ralfwagner
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Post by ralfwagner »

Hello and thanks @all!

Lou, I was using a scalpell. It is popssible cut off small pieces that are suitable for a section, aprox. 2 or 3 mm in diameter.

WalterD
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Post by WalterD »

Beautiful! Both in- and outside.

ralfwagner
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Post by ralfwagner »

Thank you, Walter.

Smokedaddy
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Post by Smokedaddy »

Excellent

ralfwagner
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Post by ralfwagner »

Thank you, smokedaddy.

ChrisR
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Post by ChrisR »

Beautifully done, as always Ralf.
Chris R

BJ
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Post by BJ »

Ralf,

as usual great images. Your series of lichen photos are always superb.

Thank you for posting,

regards,

brianO

ralfwagner
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Post by ralfwagner »

Thank you for your kind comments, Chris and Brian.

RogelioMoreno
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Post by RogelioMoreno »

Nice!

Rogelio

JH
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Post by JH »

Interesting photos and inspiring!
Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo

ralfwagner
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Post by ralfwagner »

Thank you, Jörgen.

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