In response to shortened day length and cool temperatures in the fall, many trees begin a period of senescence when the breakdown of chlorophyll exceeds chlorophyll production. The leaves of these trees appear to change to yellow and orange. Using your knowledge of photosynthetic pigments, explain the source of these yellow-orange hues.
In response to shortened day length and cool temperatures, many trees begin a period of senescence where the breakdown of chlorophyll exceeds chlorophyll production. The leaves of these trees appear to change to yellow and in orange.
