Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810117977
Authors: Ankam, Nirmala
Advisor: Dr.A.Manohar Rao
Title: “STUDIES ON THE EFFECT OF POSTHARVEST CHEMICALS AND HANDLING TECHNIQUES ON EXTENSION OF VASE LIFE OF CUT CHRYSANTHEMUM (Dendranthema grandiflora) CV. ARCTICQUEEN”
Publisher: Dept. of Floriculture and Landscape Architecture , College of Horticulture, SKLTSHU, Rajendranagar, Hyderabad
Language: en
Type: Thesis
Pages: 411
Agrotags: null
Keywords: “STUDIES ON THE EFFECT OF POSTHARVEST CHEMICALS AND HANDLING TECHNIQUES ON EXTENSION OF VASE LIFE OF CUT CHRYSANTHEMUM (Dendranthema grandiflora) CV. ARCTICQUEEN”
Abstract: The present investigation entitled “Studies on the effect of postharvest chemicals and handling techniques on extension of vase life of cut chrysanthemum (Dendranthema grandiflora) cv. Arcticqueen” was carried out in the Department of Floriculture and landscape Architecture laboratory, College of Horticulture, Rajendranagar, Hyderabad during the year 2017-2018, 2018-2019. The main objective of the investigation was to find out the efficacy of different floral preservatives and packaging material on physical (fresh weight of flower, diameter of flower, percent neck bending, vase life and over all acceptability of flowers), physiological (water uptake, transpiration loss of water, fresh weight change, relative water content, chlorophyll content in calyx), biochemical parameters (TSS of petals, pH of vase solution, optical density of vase solution, electrolyte leakage) in two days interval were recorded during the vase life period of cut chrysanthemums. All the experiments were laid out in completely randomized design with factorial concept and replicated thrice. A total of seven experiments were conducted, from which the first experiment was conducted to evaluate the best pulsing solution, where the flowers were held in sucrose solution alone and in combination with sodium hypochlorite for 2, 4 hours and kept in holding solution of distilled water till the end of vase life period. Among the pulsing treatments, pulsing with 10 percent sucrose solution recorded the best results for almost all the parameter studied and resulted in higher vase life (10.23 days) with maximum flower fresh weight (8.26 g), flower diameter (7.5 cm), lowest electrolyte leakage (82.03 %), fresh weight change (123.76 g), water uptake (13.76 g/f). However, sodium hypochlorite in combination with sucrose for pulsing of cut chrysanthemum flowers, did not improved the vase life of flowers. Among the different locally available preservatives studied, pongamia seed oil 1 percent was very effective in increasing the vase life of chrysanthemum cut flowers (15.93 days). It has led to lowest electrolyte leakage (76.21%) and increased water uptake (19.18 g/f) due to clear vascular tissue with no evidence of vascular blockage. Among the different essential oils, geranium oil 2.5 percent has recorded maximum vase life (8.98 days) over other essential oils studied. The flowers held in different antitranspirants, among all antitranspirants ethylalcohol 4% has maintained better water relations and recorded maximum vase life (13.80 days). However, ethylalcohol 2 percent, cobalt chloride 300 ppm was also effective in maintaining good conductivity and recorded moderate vase life of cut chrysanthemum flowers. Among the different antioxidants and mineral salts studied as holding solutions, flowers held in salicylic acid 200 ppm recorded maximum vase life (13.86 days) and flower quality as compared to other antioxidants. The positive water relations made better utilization of sugars and maintained good fresh flower weight (6.96 g) compared to other treatments. Among the flowers held in different vase solutions, aluminum sulphate 200 ppm has recorded maximum vase life (14.62 days) by maintaining good water relations in cut chrysanthemum flowers. From the set of six experiments, the best treatments were selected based on the physical, physiological, biochemical parameters to prolong maximum vase life, 10 percent sucrose (pulsing treatments) , 2 percent pongamia seed oil (locally available preservatives), geranium 2.5 percent (essential oils), ethylalcohol 4 percent (anti transparent), salicylic acid 200 ppm (antioxidant), aluminum sulphate 200 ppm (vase chemical) were tried in combinations with sucrose 10 percent pulsing treatment commonly for all the treatments to study their effect by using different packing materials (CFB boxes, plastic sleeves) with two levels of ventilation (10 percent and 30 percent) in both CFB boxes and plastic sleeves. Later, they were stored in room temperature in the laboratory. Based on physiological loss in weight, percentage of spoiled flowers (wilted or faded flowers) was subsequently evaluated for storage life. Aluminum sulphate 200 ppm +10 percent ventilation in CFB boxes recorded maximum storage life (3.00) days. The same flowers also recorded the lowest physiological loss of flower weight (13.32%) and good flower diameter (6.0 cm) during storage period compared to other treatments
Subject: Floriculture and Landscaping
Theme: POSTHARVEST CHEMICALS AND HANDLING TECHNIQUES ON EXTENSION OF VASE LIFE OF CUT CHRYSANTHEMUM
These Type: Ph.D
Issue Date: 2019-06-15
Appears in Collections:Thesis

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