Wednesday, May 1, 2013


Aesculin is a glucoside, an organic molecule that bounds an alcohol molecule with a sugar molecule and that occurs in the horse chestnut (Aesculus hippocastanum). Aesculin fluoresces in long wave ultraviolet light with a blue color. It is enriched in the bark of branches and fresh sprouts of the tree. This are some photos of sections from a fresh spring sprout of horse chestnut tree in ultraviolet light with a wavelength of 360 nm. They are some nice examples of the aesculin distribution inside the plant. In addition, there are also mystical colors indicate that small miracles can be found on the doorstep (in my opinion).

These are some longitudinal sections trough a fresh sprouts in visible and in ultraviolet light.

A part with fresh grown leafs:

horse chestnut

Section trough fresh grown sprouts:

Fluorescence aesculin

Cross section trough a fresh branch:

You may also see my post with horse chestnut flowers in ultraviolet light.
 This post is shared with Wordless Wednesday and NatureFootstep.



  1. Nice abstract pictures, all of them.

  2. Interesting series of photos♫ My Abstract:

  3. huh, something else I've never seen. I'm not sure I can tell what the UV light shows in this case that regular light didn't.


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