الفهرس 
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Abstract
The present work aimed to improve keeping quality of gerbera cv. Rosamine cut flowers by using of pulsing, holding solutions and cold storage periods as well as their combination treatments. Besides, studying these treatments effects on post harvest characters (vase life and change in fresh weight) and water relations (water uptake, water loss and water balance) characters as well as chemical constituents (anthocyanin content, total sugars, total nitrogen and protein percentages) in cut flowers of gerbera. Pulsing solution treatments used were control distilled water (D.W.), sucrose at 5 % plus 8-hydroxy quinolene sulphate (8-HQS) at 200 ppm for 18 hours, benzyladenine (BA) at 10 ppm + 5 % S + 200 ppm 8-HQS for 18 hours, silver thiosulphate (STS) 1:4 mM for 20 minutes then placed in 5 % S + 200 ppm 8-HQS for 18 hours, STS 1:4 mM for 20 minutes then placed in BA at 25 ppm + 5 % S + 200 ppm 8-HQS for 18 hours and sodium nitroprusside (SNP) 250 ppm for 1 hour then placed in BA at 25 ppm + 5 % S + 200 ppm 8-HQS for 18 hours. Furthermore, storage period treatments, gerbera cut flowers were stored at 4±1°C for 0, 5 or 10 days. Whereas, holding solutions treatments were control distilled water (D.W.) and [sucrose (S) 2.5% + 8-hydroxyquroline sulphate (8-HQS) at 200 ppm + citric acid (CA) at 150 ppm, besides to the combination treatments between them the combination between pulsing solutions and storage periods, the combination between pulsing solutions and holding solutions, the combination between storage periods and holding solutions as well as the combination between pulsing solutions, storage periods and holding solutions treatments used and correlation coefficient between these characters as affected by the combination between pulsing solution, storage periods and holding solution treatments used. The obtained results came to the conclusion that, the higher quality and the longest vase life of gerbera cv. rosamine cut flowers were obtained by using the combination treatments between STS + S + 8-HQS for 18 hours as pulsing solution and storage at 4±1°C for 0-time (start) 5 and 10 days and holding solution contained [sucrose (2.5%) + 8-hydrox quinolene sulphat (200 ppm) + citric acid (150 ppm)] compared to the other ones under study.