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STUDIES ON THE EFFECT OF TEMPERATURE, SUCROSE, ORGANIC ACIDS, BIOCIDES AND PACKING ON EXTENSION OF VASE LIFE OF CARNATION (Dianthus caryophyllus L.) cv. DOMINGO

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Title STUDIES ON THE EFFECT OF TEMPERATURE, SUCROSE, ORGANIC ACIDS, BIOCIDES AND PACKING ON EXTENSION OF VASE LIFE OF CARNATION (Dianthus caryophyllus L.) cv. DOMINGO
 
Creator UPPALURI SUDHA
 
Contributor Dr. R. CHANDRASEKHAR
 
Subject extension of vase life ,sucrose, organic acids,biocides
 
Description The present investigation entitled “Studies on the effect of temperature, sucrose, organic acids, biocides and packing on extension of vase life of carnation cut flowers (Dianthus caryophyllus L.) cv. Domingo” was carried out at Quality control Laboratory,ANGRAU,Rajendranagar,Hyd, during December 2011 to May 2012. The main objective of the investigation was to find out the efficacy of temperature and different preservatives like sucrose, organic acids, biocides and best of sucrose, organic acids and biocides and packaging material (polypropylene) on the post harvest vase life of cut carnation flowers. All the experiments were laid out in completely randomized design with factorial concept and replicated thrice.
A total of five experiments were conducted, from which the first experiment was conducted to evaluate the appropriate storage temperature (50C, 100C and at ambient temperature) and varieties (cv.Donna, cv.Domingo and cv. Keiro) for maximum vase life. Significantly lowest physiological loss in weight, highest water loss and lowest flower size and highest vase life of 25 days was recorded in carnation flowers cvDomingo stored at 50C. As the storage temperature increased the PLW losses increased and concomitantly water loss has decreased irrespective of the variety studies. Among the varieties cv.Donna stored at ambient temperature recorded lowest vase life of 6 days. The increase in vase life at low temperature may also be due to low microbial activity at low temperatures. With respect to biochemical parameters, highest retention of chlorophyll content of leaf and calyx and lowest electrical conductivity was recorded in carnation cv Domingo stored at 50C.
In the second experiment carnation cv Domingo was treated with various concentrations of sucrose (2, 4, 6 and 8 %) and stored at 50C. Significantly lowest physiological loss in weight, highest water loss and lowest flower size and highest vase life of 28.66 days was recorded in carnation flowers cv Domingo treated with sucrose 4 % and stored at 50C. Control recorded lowest vase life of 23 days. Significantly low microbial population was recorded in carnation treated with sucrose 4 %. The low PLW and high water loss concomitantly with low microbial population might be responsible for high vase life in sucrose 4 % treatment when compared with control and other treatments. In the third experiment carnation cv Domingo was treated with various concentration of organic acids (ethanol 1,2,3,4 % and acetaldehyde 1, 2, 3, 4 %) and stored at 50C. Significantly lowest physiological loss in weight, highest water loss and lowest size of flower and highest vase life of 23.66 days was recorded in carnation flowers cvDomingo treated with ethanol 1 % and stored at 50C. Control recorded lowest vase life of 20.33 days. Significantly low microbial population was recorded in carnation treated with ethanol 1 %.
In the fourth experiment carnation cv.Domingo was treated with various concentrations of biocides (Nickel at 30, 45, 60 mg.l-1, Cobalt at 50, 75,100 mg.l-1 and Silicon at 100, 150, 300 mg.l-1) and stored at 50C. Significantly lowest physiological loss in weight, highest water loss and lowest flower size and highest vase life of 28.33 days was recorded in carnation flowers cv Domingo treated with Nickel at 45 mg.l-1 and stored at 50C. Control recorded lowest vase life of 23.66 days. Cobalt at 75 mg. l-1 and Silicon at 150 mg. l-1 were also equally effective in increase in the vase life about 28 days. Significantly low microbial population was recorded in carnation treated with Nickel at 45 mg.l-1. In the fifth experiment carnation cv Domingo was treated with best of second, third and fourth experiment (Sucrose 4 %, Ethanol 1% and Nickel at 45 mg.l-1) along with polypropylene packing with ventilation (10,20,30 %)and stored at 50C. Significantly lowest physiological loss in weight, highest water loss and lowest flower size and highest vase life of 33.66 days was recorded in carnation flowers cv Domingo treated with Nickel at 45 mg.l-1 + PP 20 % and stored at 50C. Control recorded lowest vase life of 21.66 days. Significantly low microbial population was recorded in carnation treated with Nickel at 45 mg.l-1 + PP 20 %. The low PLW and high water loss concomitantly with low metabolic activity might be responsible for higher vase life in Nickel at 45 mg.l-1, Cobalt at 75 mg. l-1 and Silicon at 150 mg. l-1 treatments when compared with control and other treatments. Further, with respect to biochemical parameters, highest retention of chlorophyll content of leaf and calyx and lowest electrical conductivity was recorded in carnation cv Domingo treated with Nickel at 45 mg.l-1 + PP 20 % stored at 50C which has recorded highest vase life.
 
Date 2016-07-23T10:52:51Z
2016-07-23T10:52:51Z
2012-12
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69500
 
Language en
 
Format application/pdf
 
Publisher Dr.Y.S.R. HORTICULTURAL UNIVERSITY