Abstract
The aim of the study was to evaluate the postharvest longevity of cut leaves of Viola odorata and determine their usefulness as a florist green. The research also involved the study of the influence of chemical compounds used as plant preservatives on the longevity of leaves of V. odorata. The leaf stalks of V. odorata were soaked in water or conditioned in a 200 mg·dm−3 solution of 8–hydroxyquinoline sulphate, or a 50 or 100 mg·dm−3 solution of gibberellic acid. After one day, the leaves were kept in water or 200 mg·dm−3 of 8–hydroxyquinoline sulphate. The leaves of V. odorata had a longevity of about 31 days in water. Both the conditioning in gibberellic acid and 8–hydroxyquinoline sulphate and the maintenance in 8–hydroxyquinoline sulphate reduced the vase life of cut V. odorata leaves. The application of conditioners resulted in a significantly greater reduction of the leaf mass. The Soil Plant Analysis Development value of the leaves was best affected by conditioning them in 100 mg·dm−3 gibberellic acid followed by keeping them in water. Cut leaves of V. odorata with water treatment may be used as a florist green.
Highlights
Gibberellic Acid on Postharvest ViolaThe development of the flower industry has resulted in an increased demand for new plant materials that could be used as decoration in flower arrangements
The postharvest longevity of cut leaves of Viola odorata kept in water was approxi‐
Conditioning cut V. odorata leaves in gibberellic acid applied at a concentration of 50 or 100 mg∙dm−3 and 8‐hydroxyquinoline sulphate at a concentration of 200 mg∙dm−3 significantly reduced their vase life
Summary
Gibberellic Acid on Postharvest ViolaThe development of the flower industry has resulted in an increased demand for new plant materials that could be used as decoration in flower arrangements. The cultivation of warmer-climate greenery in the temperate climate conditions is often unprofitable or even impossible. Such florist greens are replaced by temperate-climate plants grown in greenhouses and in open fields. Viola odorata L. is a perennial indigenous to the temperate climate zone. The leaves are small and not very showy at the beginning of the vegetation period, and could reach a diameter of up to 8 cm. They are ovate with serrated edges [2]. The mature leaf stalks of V. odorata look very attractive and seem suitable for floral arrangements
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