Why do leaves fall down from the tree after turning yellow?
Answers
Answer:
CHLOROPHYLL is the pigment which helps leaven to get green colour. ... When the plant lose chlorophyll they can't make food in the form of photosynthesis. Like human beings, they also ie without getting enough food.So the leaves fall down from the tree when they turn into yellow.
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Answer:
Chlorophyll that gives green colour to the leaf is recycled and decomposed just before it is supposed to fall ,other pigments become prominent giving it a yellow colour.
Explanation:
•The leaves stop producing food in the fall due to changes in temperature and the length of daylight. Chlorophyll decomposes, the green colour vanishes, and the yellow to orange hues emerge.
•It is known as "programmed cell death." In comparison to newly emerging or younger leaves, an older leaf will become less functional and perform fewer physiological operations including photosynthesis and respiration.
•The younger leaves will receive the mobile nutrients, such as nitrogen, phosphorus, and potassium.
•The leaves turn yellow when nutrients are lost. The plant growth hormone, ABA (abscisic acid), creates an abscission zone at the end of the petiole, which causes the leaf to fall off of the plant. All plants and trees go through this procedure.