OBJECTIVE FORESTRY

Detailed explanation-1: -Abscisic acid (ABA ) and ethylene are the primary regulators of fruit ripening and senescence. Ethylene is well-known for its role in plant age, including fruit ripening and flower and leaf senescence. Ethylene is a gaseous plant hormone that causes fruit to mature.

Detailed explanation-2: -Ethylene is a gaseous plant hormone that plays an important role in inducing the ripening process for many fruits, together with other hormones and signals. An unripe fruit generally has low levels of ethylene. As the fruit matures, ethylene is produced as a signal to induce fruit ripening.

Detailed explanation-3: -Ethylene is best known for its effect on fruit ripening and organ abscission, and thus has great commercial importance in agriculture. As a gaseous hormone, ethylene can freely diffuse across membranes and is thought to be synthesized at or near its site of action, which is different from other plant hormones.