In autumn, chlorophyll is degraded in the leaves of deciduous trees. why do the leaves change color to shades of yellow, orange, or red?

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23-12-2017
Biology

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In autumn, chlorophyll is degraded in the leaves of deciduous trees. why do the leaves change color to shades of yellow, orange, or red?

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please answer this teacher.

maryannbrune maryannbrune · Answer 1 · 2017-12-23T18:16:31+01:00

maryannbrune maryannbrune

23-12-2017

Chlorophyll normally masks the yellow pigments known as xanthophylls and theorange pigments called carotenoids — both then become visible when the greenchlorophyll is gone. These colors are present in the leaf throughout the growing season. ... The only pigments that remain are tannins, which are brown.

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Arclight Arclight · Answer 2 · 2019-10-22T04:37:10+02:00

Answer:

Due to the coloring pigment Anthocyanins.

Explanation:

It is the Anthocyanins which is the factor behind the yellow , orange and red color of leaves.

During autumn season, the leaves of a plant stop making food. As a result of this the chlorophyll with in the leaves of such plants start degrading. Since the chlorophyll gives green color to the leaves, thus once this green pigment is degraded leaves no more remain green. They first convert to yellow color , then orange and finally red due to the coloring pigment "Anthocyanins"

In some cases even the stems start changing color due to high level of Anthocyanins