Question

The changes in the surrounding environment can have
an effect on plants too. For a few weeks in the autumn season, normally green
leaves of deciduous plants acquire a red to yellow colour. How and why does
this change in colour happen?

Answer 1

The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor. At the same time other chemical changes may occur, which form additional colors through the development of red anthocyanin pigments.

Answer 2

dear .......In autumn when it starts to get cold, some plants stop making chlorophyll. Instead, those plants break down chlorophyll into smaller molecules. As chlorophyll goes away, other pigments start to show their colors. This is why leaves turn yellow or red in fall.