Studies regarding the bioregulators influence over the morphologic and ornamental characters of Allium ’Purple Rain’

Abstract

The experiment was carried out to study the effect of the bioregulators on the Allium ’Purple Rain’ ornamental onion cultivar morphologic and decorative traits. There were used two bioregulators, represented by a growth retardant, Cycocel (CCC), and a growth stimulant, gibberellic acid (GA3), applied by foliar spraying, in three concentrations (250, 500 and 1000 ppm). The plants were studied during the vegetation season. They were evaluated regarding the main morpho-decorative characters, like leaves length, leaves number/plant, flowering stem height, inflorescence diameter, bulbs weight/plant and bulbs number/plant. The aim of this study was to indentify the product and concentration witch favors the studied characters. The most favorable influence was registered in case of the GA3 treatment, in the 500 ppm doses for leaves length, flower stem length, inflorescence diameter and bulb yield and CCC, in 500 ppm doses for bulbs number.