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The longevity of cut Polygonatum multiflorum (L.) All. shoots depending on postharvest handling
The experiment was carried out to investigate the possibility of extension of the postharvest longevity of cut shoots of <i>Polygonatum multiflorum</i> depending on the type of conditioning. The shoots were collected for three experiments in May, June, and July. The following substances were used for conditioning: gibberellic acid (in May, June, and July) at a concentration of 50 and 100 mg dm<sup>-3</sup>, benzyladenine (in May) at a concentration of 50 or 100 mg dm<sup>-3</sup>, and 8-hydroxyquinoline sulfate (in July) at a concentration of 200 mg dm<sup>-3</sup>. The conditioning was carried out at a temperature of 5 °C or 18 °C (May, June) or 18 °C (July). After conditioning, shoots were stored in a room at a temperature of 18 °C (May, June) or at 18 °C or 22 °C (July). The shoots of <i>Polygonatum multiflorum</i> harvested in July and conditioned with gibberellic acid at a concentration of 100 mg dm<sup>-3</sup> were characterized by extended longevity. Benzyladenine at a concentration of 50 mg dm<sup>-3</sup> proved to be useful for conditioning. In turn, 8-hydroxyquinoline sulfate had no influence on the longevity of the shoots. The variation in the temperature during conditioning and storage was found not to have a positive impact on longevity.
The Effect of 8-Hydroxyquinoline Sulphate and Gibberellic Acid on Postharvest Viola odorata L. Leaf Longevity
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.