Shant LalPunetha, Parul2016-06-152016-06-152013-10http://krishikosh.egranth.ac.in/handle/1/67427Thesis-PhDThe present investigation was carried out at Model Floriculture Centre, Department of Horticulture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, during the year 2010-11 to 2011-12 to study the effect of pulsing solutions, wrapping materials and antitranspirants on the post harvest life of rose cv. Naranja. During the course of study, flowers of uniform length i.e. 40 cm were used at tight bud stage. The experiments were laid out in Completely Randomized Design and replicated thrice. Pulsing treatments comprised of 12 and 24 hour pulsing duration and three different chemicals (STS, 8-HQC and chlorine) which were tested alone in different concentrations and in combination with sucrose also. Studies revealed that flowers pulsed with sucrose 5% + 8-HQC 200 ppm for 24 hrs was the best treatment and helped the stems to maintain better water relation in terms of water uptake, water balance, total sugars, appearance score which consequence the maximum vase life of 10.50 days as compared to control (4.02 days). Wrapping materials viz. Cellophane, polypropylene, Newspaper, LDPE (100 gauge), LDPE (200 μ) and Butter paper were used and then stored at 4˚C for five durations i.e., 0, 3, 6, 9 and 12 days. The studies revealed that wrapping the flowers in LDPE (100 gauge) proved promising in augmenting the keeping quality of flowers. The keeping quality of unpackaged flowers were highly deteriorated and decreased with increase in storage duration. Another experiment on the standardization of antitranspirant solution was performed, in which all the antitranspirant treatments (Glycerol, MgCO3, Paclobutrazol) significantly increased the vase life over control, but out of the different treatments, spraying of glycerol 8% delayed the process of flower opening, slow down the rate of stomatal conductance, decrease the water loss and prolong the vase life of cut rose cv. Naranja. Thus the present investigation revealed that out of the different treatments, effect of wrapping materials was found to be beneficiary to enhance the vase life of cut rose cv. Naranja.enfloriculture, roses, pulsing, packaging materials, transpiration, postharvest life, cut flowersThesis