As the warmth of summer fades away, the autumn season brings with it a refreshing change in the atmosphere, painting the world with vibrant hues of orange, red, and yellow. The crisp air carries the sweet scent of ripe fruits and woodsmoke, beckoning us to step outside and bask in the beauty of nature's canvas.
Behind the postcard-perfect landscapes lies a precise biological clock. As days shorten and temperatures cool, deciduous trees receive a hormonal signal: stop producing chlorophyll, the molecule responsible for both photosynthesis and the green hue of leaves. With chlorophyll vanishing, other pigments long present—carotenoids (yellow and orange) and anthocyanins (red and purple)—finally take the stage. autumn season