Disclosed is a method of inhibiting an ethylene response in a plant (particularly a cut flower), comprising applying to the plant an effective ethylene response-inhibiting amount of at least one cyclopropene amine compound having the structure shown herein or a salt or composition thereof, wherein said salt of the compound may be selected from the group consisting of phosphate, acetate, formate, carbonate, hydrobromide, hydrochloride, sulfate, bisulfate, nitrate, acetate, trifluoroacetate, oxalate, valerate, oleate, palmitate, stearate, laurate, borate, benzoate, lactate, tosylate, citrate, maleate, fumarate, succinate, tartrate, naphthylate, mesylate, glucoheptonate, lactiobionate and laurylsulfonate salts, and wherein said ethylene response may be one or more of ripening or senescence of flowers, fruits, and vegetables abscission of foliage, flowers, and fruit the shortening of life of ornamental plants, cut flowers, shrubbery, seeds, or dormant seedlings inhibition of growth stimulation of growth auxin activity inhibition of terminal growth control of apical dominance increase in branching increase in tillering changing the morphology of plants modifying the susceptibility to plant pathogens including fungi changing bio-chemical compositions inducing pest resistance abortion or inhibition of flowering or seed development lodging effects stimulation of seed germination breaking of dormancy hormone effects and epinasty effects.
