Extending vase life of carnation flowers by postharvest nano silver, humic acid and Aloe Vera gel treatments

Abstract Standard Carnation flowers (Dianthus caryophyllus cv. Dover) were harvested at the paint brush stage in early morning, pre-cooled 4° C for 6-h then moved under dry conditions to laboratory. Flowers weighted and treated 24-h with silver nanoparticles (AgNPs) 0, 5 or 10 ppm plastic buckets. After pulsing treatments, cut transferred 500 mL glass jars containing 300 of preservation solution treatments including, individually, humic acid 200, 400 600 Aloe vera gel 2.5%, 5.0% 7.5% (w/v) till end experiment (when flower color began fade, petals roll). Distilled water was used control prepare tested solutions. 2% sucrose added all including control. Addition preservatives vase solutions significantly increased studied characteristics compared (distilled water, least values). Nanosilver have potential be as preservative improving postharvest life quality carnation flowers. An increment life, relative fresh weight, uptake, diameter well total chlorophylls leaves, carbohydrates phenols leaves observed, addition a decrease bacterial counts solution. Best results obtained using AgNPs + followed by +7.5% gel, especially level, showed better than when alone combined AgNPs. recorded single treatment.