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Expression of Anthocyanins and Carotenoids
Expression of Anthocyanins and Carotenoids

Photograph Information Photographer's Comments
Challenge: School Days: Chemistry (Basic Editing III)
Camera: Canon EOS-5D
Lens: Canon EF 24-105mm f/4.0L IS
Location: Rocky Mountain National Park, Estes Park, CO
Date: Sep 12, 2006
Aperture: f/10
ISO: 400
Shutter: 1/50 second
Galleries: Nature, Macro
Date Uploaded: Sep 12, 2006

Autumn Color Change

When leaves appear green, it is because they contain an abundance of chlorophyll. Chlorophyll masks other pigment colors. Anthocyanins, in turn, mask carotenoids. As summer turns to autumn, decreasing light levels cause chlorophyll production to slow. However, the decomposition rate of chlorophyll remains constant, so the green color will fade from the leaves. At the same time, anthocyanin production in leaves increases, in response to surging sugar concentrations. Leaves containing primarily anthocyanins will appear red. Leaves with good amounts of both anthocyanins and carotenoids will appear orange. Leaves with carotenoids but little or no anthocyanins will appear yellow.

Place: 62 out of 90
Avg (all users): 5.0642
Avg (commenters): 6.0769
Avg (participants): 4.5714
Avg (non-participants): 5.1303
Views since voting: 907
Views during voting: 383
Votes: 296
Comments: 14
Favorites: 0

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09/25/2006 07:14:06 PM
Critique Club Review:

Focus is nice and sharp, depth of field was used well to isolate the subject from the background clutter.

Color saturation and hue are done quite well. Lighting, brightness and contrast are done very well also.

Unfortunately I thinky your score suffered from the votes of those who take the challenge litterally. (I don't see no stinking test tubes....)

This is a nice picture. Some evidently didn't grasp the chemistry that goes on in nature. Not enough drama for a top finish here, but certainly not worth over 100 votes less than a 5.
  Photographer found comment helpful.
 Comments Made During the Challenge
09/19/2006 06:51:04 PM
Nice fall shot and I would say there is more Anthocyanins in them leaves then Anthocyanins and Carotenoids but still I fully see the effects. Nice sharp shot and good DOF (out of focus) background.
  Photographer found comment helpful.
09/19/2006 11:59:18 AM
Nice photo.
  Photographer found comment helpful.
09/16/2006 02:57:46 AM
wonderful autumn colours...lets hope the voters are kind as far as you meeting the challenge...lovely shot
  Photographer found comment helpful.
09/15/2006 06:38:03 PM
Whatever you say... Fall is really at door.
  Photographer found comment helpful.
09/15/2006 01:41:56 PM
nice colours, but you're strecting it
  Photographer found comment helpful.
09/13/2006 11:59:22 PM
Interesting take on the challenge. I hope you don't get too many DNMC
  Photographer found comment helpful.
09/13/2006 10:47:33 PM
Nice capture, the colors are beautiful.
  Photographer found comment helpful.
09/13/2006 09:24:22 PM
To many big words! Nice colors and good sharp image. I love aspen leaves and am looking forward to going up to the mountains and seeing the colors in the coming weeks.
  Photographer found comment helpful.
09/13/2006 09:11:21 PM
Nice vivid colours. nice dof.
  Photographer found comment helpful.
09/13/2006 06:55:19 PM
Huh? WAY over my head!
  Photographer found comment helpful.
09/13/2006 03:03:48 PM
Love the sharpness of the leaves.
  Photographer found comment helpful.
09/13/2006 10:20:51 AM
Applied chemistry - botany too. Nice colours but not overtly school chemistry.
  Photographer found comment helpful.
09/13/2006 01:06:18 AM
Awesome title.
  Photographer found comment helpful.

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