Hello,
this crustose lichen is from an old lead pit. It is growing on silicate rocks.
- Closeup thallus, 105 mm makroobjective with 36 mm extension ring, 45 picture stack with Helicon
- section apothecium, LCB (lactophenol-cottonblue) stain
- Spore, 43 x 16 µm
- Orange fluorescence of the rhizocarpic acid that is situated in the cortex. Beneath the red chlorophyll autofluorescence of the photobiont, a green algae.
Rhizocarpon lecanorinum
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- ralfwagner
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- Location: Germany, Duesseldorf
- Contact:
Rhizocarpon lecanorinum
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Ralf
http://www.lichenes.de
http://www.dr-ralf-wagner.de
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Ralf
http://www.lichenes.de
http://www.dr-ralf-wagner.de
http://www.youtube.com/user/drralfwagner
- ralfwagner
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- Location: Germany, Duesseldorf
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Mike, this is a very good iadea and will bring you much to see and learn about nature.Mike wrote: Might have to look at the various lichens around my place.
Thanks @ all for your interest in lichens.
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Ralf
http://www.lichenes.de
http://www.dr-ralf-wagner.de
http://www.youtube.com/user/drralfwagner
Ralf
http://www.lichenes.de
http://www.dr-ralf-wagner.de
http://www.youtube.com/user/drralfwagner
It seems that lichens produce quite a lot of different colours with UV autofluorescence. See here.
https://canadianmuseumofnature.wordpres ... -of-light/
https://canadianmuseumofnature.wordpres ... -of-light/
- ralfwagner
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- Joined: Sat Aug 05, 2006 8:34 am
- Location: Germany, Duesseldorf
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Rhizocarpic acid is auto fluorescent. I used a "royal blue led" @ 440 nm for exitation. Look here for the chemical structure: http://www.chemicalbook.com/ChemicalPro ... 202378.htmPau wrote: Is this rizocarpic acid auto fluorescent? Is it present in many lichen species? What excitation wavelength did you use?
Rhizocarpic acid is present in all yellow or yellow-green species of the genus Rhizocarpon. You will find rhizocarpic acid also in many Acarospora species and in some Lecanora spec. (e.g. Lecanora epanora) and in Lecidea lucida. This list is not complete but just what is mentioned in my literature.
As mentioned by Pitufo, there are many auto fluorescent lichen substances. For example many Cladonia spec. show a white fluorescence caused by sqamatic acid, Xanthoria parietina shows the orange fluorescence of parietin.
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Ralf
http://www.lichenes.de
http://www.dr-ralf-wagner.de
http://www.youtube.com/user/drralfwagner
Ralf
http://www.lichenes.de
http://www.dr-ralf-wagner.de
http://www.youtube.com/user/drralfwagner