Ethylenereleasing

Ethylenereleasing refers to substances or processes that release ethylene, a gaseous plant hormone, into the surrounding environment. Ethylene regulates ripening, senescence, abscission, and responses to stress in many plant species, and its controlled release is used to influence developmental timing and quality characteristics in crops.

Most practical ethylene-releasing agents are plant growth regulators that release ethylene under specific conditions. The prototypical compound is ethephon (2-chloroethyl phosphonic acid), which releases ethylene after hydrolysis in plant tissues. Other formulations and precursors generate ethylene through enzymatic or chemical conversion, enabling controlled timing and dosage, often tailored to crop type and growth stage.

Applications of ethylenereleasing agents include inducing fruit ripening in harvested crops such as bananas, tomatoes, and apples, as well as flowering induction or dormancy release in certain bulb crops. They can also promote thinning or abscission in some fruit trees. When used properly, ethylene release can help synchronize harvests, extend the market window, or improve postharvest quality; however, improper use can lead to uneven ripening, quality loss, or regulatory concerns.

Safety and regulation: Agents that release ethylene are typically regulated as plant growth regulators or agricultural inputs. Use is governed by label directions, application timing, and consideration of residues, environmental impact, and worker safety. Handling and storage guidelines are important to minimize degradation, exposure, and unintended release.

See also: Ethylene, Plant hormone, Plant growth regulator, Ethephon.