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tree or shrub species displays its particular color. But each individual plant has its own shade of that color, which is influenced by climatic and soil conditions.
Just before the leaves drop in autumn, the nutrients they contain start to move back into the stems and roots. The green chlorophyll pigment is no longei produced, and that which is in the leaf, is destroyed by light.
Most leaves contain yellow color which is hidden during the summer by the green pigment When the chlorophyll disappear: in the fall, the yellow color:
96.6%