A little wonder, every day
Autumn color depends on pigments and season
Справжнє фото різнобарвного осіннього листя на воді; контекст сезонного забарвлення, не вимірювання пігментів / Real photograph of colored autumn leaves on water; seasonal context, not a pigment measurement. Credit: Free Nature Stock; CC0. http://creativecommons.org/publicdomain/zero/1.0/deed.en Source: https://commons.wikimedia.org/?curid=117613581
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Autumn coloration in deciduous leaves involves more than cold alone. Shortening days and seasonal temperature changes influence leaf senescence and the breakdown of green chlorophyll. Yellow and orange carotenoids become visible, while some species produce red anthocyanins in autumn. Species, light, moisture and weather affect timing and intensity, so there is no single rule for every tree.