Each hormone can interact with the other causes various result in the plant growth and plant development. These reactions can also be differed by the concentration of the hormone, the plants growth stage, as well as its site of action. Ethylene is defined as the only gaseous plant hormone, responsible for the fruit ripening, growth inhibition, leaf abscission, and aging.
Ethylene is a gaseous by-product of kerosene combustion, which allows fruit to ripen in sheds.
The ethylene is actually a hormone that is produced by the plant. This hormone produces more actions then just fruit ripening. Since this is the only plant hormone that is transported as a gas, it is allowed to diffuse it through the air spaces between the cells. Also this hormone can be transported in the cytosol. Here it travels from cell to cell in the symplast and phloem.