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Asked by Raj Last Modified
When a leaf is kept in the dark for an extended period, it undergoes changes in its pigmentation and overall physiology due to the absence of light, which is essential for photosynthesis. The yellowing or pale green coloration of leaves in darkness is primarily attributed to the breakdown of chlorophyll and changes in pigment composition. Here's why:
Chlorophyll Degradation:
Formation of Anthocyanins:
Stability of Pigments:
In summary, the yellowing or pale green coloration of leaves kept in darkness is primarily due to the breakdown of chlorophyll, the primary green pigment, in the absence of light. While some plants may exhibit changes in pigment composition leading to the formation of other pigments like anthocyanins, carotenoids generally remain more stable and may contribute to the observed coloration.
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