Why Do Trees Shed Their Leaves?
When a boat starts sinking, they begin unloading the burden. Similarly, when winters arrive, the process of photosynthesis slows down, and trees begin to store sugars in their stems and roots.
But why do leaves fall off trees only in autumn? Let's Find the reason behind the process of leaf shedding in Autumn.
Impact of Temperature:
The suitable temperature for normal metabolism in plants is 25°C - 30°C, which becomes extremely low during winter. As a result, the metabolic rate decreases, leading to changes in trees' physiology.
Role of Chlorophyll:
Chlorophyll is present in leaves, which is a pigment that converts sunlight into energy.During winters when sunlight is scarce, trees begin to absorb chlorophyll from the leaves because they need nutrients. This process also gives rise to the vibrant colors of autumn leaves.
Different Leaves Color
Hormonal Changes:
One important reason for leaf shedding is a plant hormone called Abscisic acid (ABA). When ABA accumulates in the abscission layer (the part of the leaf attached to the stem), it leads to the formation of this layer.
The abscission layer blocks nutrient transport, causing the leaves to shed.
Seasonal Rest:
Some trees take away all the food from their leaves, leaving them weakened and causing them to fall off. As a result, tired trees will rest like bears sleep through the winter, waiting for spring to arrive with new leaves.
Evergreens:
Not all trees shed their leaves. Some have thick resins and waxes that protect their cells from damage and help them retain moisture, allowing them to keep their leaves throughout the year.
Autumn leaves bring about a mesmerizing transformation in nature, leaving us amazed by the cycle of life.
The process of leaves falling from trees in autumn is a combination of hormonal changes, temperature impact, and nutrient requirements.
The colorful hues of red, yellow, and orange act as a signal from the trees to insects, indicating that their shelter is no longer suitable and that they should seek other hiding spots. It's nature's way of preparing for the colder season.
Resting Period:
So, the next time you witness the vibrant colors of fall, remember that it's nature's way of preparing for the winter slumber and refreshing itself for the coming spring.
