EFFECT OF GROWTH REGULATORS AND ETHYLENE INHIBITORS ON THE WATER UPTAKE, TRANSPIRATION LOSS OF WATER, FLOWER DIAMETER AND VASE LIFE OF CUT CARNATION FLOWERS CV. CHARMANTM. Madhuri, R. Bindu Praveena, N. Hari Prasad Rao and I. VijayAbstract The vase life of cut carnation flowers were studied to determine the physiological, biochemical and microbial factors that affect the rate of senescence. Cut carnations were obtained from the commercial grower in Nujiveedu and treated with biocides at different concentrations. Longevity was determined on the basis of petal wilting, chlorophyll retention and carbohydrate degradation. The experimental flowers were held in the laboratory at about 25±2oC ambient room temperature, 45 to 55 per cent relative humidity (RH) and 40W cool white fluorescent tubes to maintain 12 hours photoperiod. The experiment was held in laboratory of the Department of Horticulture, College of Horticulture, A P Horticulture University, Venkataramannagudem, West Godavari dist, A.P. The experiment extended from October 2010 to March 2011. Among the different growth regulators and ethylene inhibitors, the carnation cut flower held in STS 0.25 mM vase solution recorded highest water uptake, transpiration loss of water and flower diameter. Whereas, the flowers held in control recorded the lowest water uptake, transpiration loss of water and flower diameter. Highest vase life (13.72 days) was observed with STS 0.25 mM vase solution and it was on par with BA 15 ppm. The lowest was however, recorded with control (6.61 days).
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