The present work was aimed to study the effects of some pretreatment practices as growth regulators sprays (GA3 at 200 & 300ppm, BA at 25 & 50ppm and kinetin at 50 & 100ppm ) and periods of cold storage each alone, as well as their interaction treatments on the vegetative and Flowering parameters, postharvest characters, water relation characters and some chemical constituents of tuberose and strelitzia plants and cut flower stalks. Furthermore a study fore the effect of some preservative materials treatments (pulsing and Holding solutions each alone, as well as their interaction treatments on the postharvest characters, water relation characters and some chemical constituents of tuberose and strelitzia cut flower stalks. The recorded data were some vegetative growth and flowering characters (longevity; floret opening and wilting percentages and change percentage in fresh weight of cut flower spike), water relation characters (water uptake , water loss and water balance), and some chemical constituents (chlorophyll "a", chlorophyll "b" and coroteniods , percentages of total, reducing and non reducing sugars, total phenols ,total nitrogen, total protein, phosphorus and potassium). Generally, the highest quality and the longest vase life were obtained by using the interaction treatments between GA3 at 300ppm or kinetin at 100ppm and storage periods at 4±1°C for (O-time and 7 days) of tuberose or 7±1°C for (O-time , 7 days and 14 days )of strelitzia. Furthermore using the interaction treatments between pulsing solutions of STS (1: 4mM) for 15 minutes of tuberose or 30 minutes of strelitzia and holding solution contained (sucrose at 40 g/l + 8-hydroxy-quinolene sulphate at 200 mg/l + citric acid at 200 mg/l) Compared to the other treatments under study. |
