Question

Give one word for the following:

A gaseous plant growth regulator.

Answer 1

Ethylene:

1. Ethylene is a gaseous plant hormone that regulates plant growth.
2. This hormone promotes root growth and root hair formation.
3. It also helps in fruit ripening.
4. It plays an important role in fruit ripening.

Abscisic acid(ABA):

1. ABA also induces senescence and abscission in leaves and other parts of the plants.

A gaseous plant growth regulatory hormone is ethylene.