Salicylic acid extends flower longevity in isolated flowers of Petunia hybrida Vilm
Shaziya Nisar, Riyaz Ahmad Dar, Inayatullah Tahir
An experiment was conducted to study the effect of different grades of salicylic acid (SA) on flower longevity of Petunia hybrida Vilm. The buds were subjected to different grades (0.10, 0.15, 0.20 and 0.25 mM respectively) of SA. A separate set of flowers kept in distilled water designated the control. As compared to distilled water (DW) as the control, the greatest delay in petals senescence was obtained in cut flowers treated with 0.25 mM SA. During the present study flower longevity increased by 3.7 days in the above mentioned treatment. The other parameters such as flower diameter, membrane stability index (MSI), soluble proteins, total phenols, α-amino acids and sugar fractions (total, reducing and non-reducing) were also greater in the floral buds treated with 0.25 mM SA. However, lipid peroxidase activity was suppressed in the floral buds held in 0.25 mM SA. Overall, the results suggest that SA can increase the vase life of P. hybrida isolated flowers by maintaining the MSI and soluble protein content during senescence.