Mohammad Javad Nazarideljou; Mehran Kanani
Abstract
Regarding to a few studies on odorant compounds of cut flowers, a pot experiment was conducted to evaluate the effect of pre-harvest foliar application of salicylic acid (0, 1.5 and 2.25 mM) and a-aminooxi-b-phenyl propionic acid (0, 1.5 and 3 mM) as promoter and specific inhibitor of phenylalanine ammonia-lyase ...
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Regarding to a few studies on odorant compounds of cut flowers, a pot experiment was conducted to evaluate the effect of pre-harvest foliar application of salicylic acid (0, 1.5 and 2.25 mM) and a-aminooxi-b-phenyl propionic acid (0, 1.5 and 3 mM) as promoter and specific inhibitor of phenylalanine ammonia-lyase enzyme, respectively, on tuberose “double” basis on completely randomized design with four replications. According to the results, relative water content, cell membrane stability and vase life were significantly affected by foliar application (P<0.01). The a-aminooxi-b-phenyl propionic acid (3mM) and salicylic acid treatments (1.5 mM) increased the vase life about 68 and 34% compared with control. Post-harvest collection and analysis of tuberose floral scent was conucted using headspace system and GC-MS technique and 37 different compounds were detected. Methyl benzoate, benzyl benzoate, pentacosane and methyl salicylate were the most important odorant compounds of cut tuberose respectively. a-aminooxi-b-phenyl propionic acid treatment increased benzyl benzoate and pentacosane whereby decreased methyl benzoate and methyl salicylate amount, which were opposite to salicylic acid effect. Results showed that the Promoter and inhibitor of phenylalanine ammonia-lyase enzyme activity increased and decreased total amount of cut tuberose scent, respectively.