Now Playing Tracks

IMAGE  Australian Beefwood (Casuarina cunninghamiana)
Cross-section of a stem and seven small leaves (microphylls)
_________________________________

Under an Ultraviolet [UV] lamp, things fluoresce in different ways. They don’t look the same color as under daylight.  So, ultraviolet light is used ‒ here, under a microscope  to reveal features and differences not seen in visible light.

When examined with the unaided eye, the specimen above appeared to have needles (which it is not supposed to).

Investigating with a UV microscope revealed that instead of a single needle this is a stem with seven small leaves. Not everything is as it appears to our eye.

  • The red fluorescence is from chlorophyll in the very small pentagon shaped leaves.
  • The blue fluorescence is from secondary metabolites in the vascular (central) and epidermal (outer) tissue.

IMAGE: Gregory Johnson and ASU - Ask A Biologist

66 notes

  1. imfuckincrazyyyy reblogged this from cockkkkkkkk
  2. kimstim reblogged this from cockkkkkkkk
  3. atquii reblogged this from cockkkkkkkk
  4. maiwwe reblogged this from cockkkkkkkk
  5. basedgod-png reblogged this from cockkkkkkkk
  6. moths-among-the-whisperings reblogged this from cockkkkkkkk
  7. wanted-hunter reblogged this from cockkkkkkkk
  8. cockkkkkkkk reblogged this from idcetc
  9. idcetc reblogged this from mucholderthen
  10. buttflower reblogged this from mucholderthen
  11. everythingbio reblogged this from mucholderthen
  12. lordrash reblogged this from mucholderthen
  13. bythetaillights reblogged this from mucholderthen
  14. dayringer reblogged this from mucholderthen
  15. cooterbee reblogged this from mucholderthen
  16. bossyraptor reblogged this from myvoicemyright
  17. whatthehorsedoicallthisblog reblogged this from setiniron
  18. nattvp reblogged this from mucholderthen
  19. setiniron reblogged this from mucholderthen
  20. threadbloomsandthorns reblogged this from mucholderthen
  21. oomacias reblogged this from mucholderthen
  22. myvoicemyright reblogged this from mucholderthen
  23. crazy--insanity reblogged this from mucholderthen
  24. jyotiursula reblogged this from mucholderthen
To Tumblr, Love Pixel Union