Theory:

It is a gaseous plant hormone that also acts as a growth inhibitor. It is involved in the maturing and ripening of fruits. Hence, most ethylene is synthesized during the development of fruits such as apples, bananas, and melons.
Ethylene-2D.jpg
Ethylene
Physiological effects of ethylene:
  • Ethylene is a gas that promotes the ripening of fruits such as tomato, apple, mango, banana, etc.
  • It inhibits the elongation of the stem and root of dicots.
  • Ethylene accelerates the senescence of leaves and flowers.
  • It stimulates the formation of an abscission zone in leaves, flowers, and fruits, leading to premature shedding.
  • It breaks the dormancy of buds, seeds and storage organs.
ripe-3236210_1920.jpg
Mangoes ripened with ethylene
Reference:
https://commons.wikimedia.org/wiki/File:Ethylene-2D.jpg