Plants are green because they have chlorophyll...

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91TTZ

Lifer
Jan 31, 2005
14,374
1
0
Originally posted by: Mwilding
In the fall, trees turn red, yellow and orange, because the green chlorophyll breaks down leaving the red and yellow kinds behind to color the leaves.

What about evergreens? I bet you didn't think of that one, did you?
 

Iron Woode

Elite Member
Super Moderator
Oct 10, 1999
31,283
12,798
136
Originally posted by: Mwilding
Green Chlorophyll is the predominant form seen in most plants. Some plants have more red or yellow chlorophyll - hence the color variations in leaves. Regardless of the color, all leaves have all (or most) types of chlorophyll in some proportion. In the fall, trees turn red, yellow and orange, because the green chlorophyll breaks down leaving the red and yellow kinds behind to color the leaves.
That is so wrong, its not funny.

First, leaves are green because chlorophyll reflects green light to your eyes. It absorbs the rest of the spectrum.

Second, fall colouring is because of the chemicals trees have ingested while growing. When the tree cuts off flow to the leaves, the clorophyll breaks down and disappears. The resulting minerals and other chemicals become dominant and hence colour changes.
 

Pepsei

Lifer
Dec 14, 2001
12,895
1
0
it's the red mist that was used to make philosopher's stone. the tree absorbed the poison and saved us.
 

GasX

Lifer
Feb 8, 2001
29,033
6
81
Originally posted by: Iron Woode
Originally posted by: Mwilding
Green Chlorophyll is the predominant form seen in most plants. Some plants have more red or yellow chlorophyll - hence the color variations in leaves. Regardless of the color, all leaves have all (or most) types of chlorophyll in some proportion. In the fall, trees turn red, yellow and orange, because the green chlorophyll breaks down leaving the red and yellow kinds behind to color the leaves.
That is so wrong, its not funny.

First, leaves are green because chlorophyll reflects green light to your eyes. It absorbs the rest of the spectrum.

Second, fall colouring is because of the chemicals trees have ingested while growing. When the tree cuts off flow to the leaves, the clorophyll breaks down and disappears. The resulting minerals and other chemicals become dominant and hence colour changes.
Hey, my degree was in animal biology not plant biology... :p
 

azazyel

Diamond Member
Oct 6, 2000
5,872
1
81
Originally posted by: her209
Different chlorophyll use different parts of the light spectrum. In the case of green chlorophyll, they use everything but the green.

Correctamungo! Thus the green is reflected back to us and that is why they appear green.