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Online ISSN : 2349-8080 Issues : 12 per year Publisher : Excellent Publishers Email : editorinchiefijcrbp@gmail.com |
2Department of Botany, Kurukshetra University, Kurukshetra - 136119, India
Senescence regulation in Aster novae belgii petals was studied by taking mature cut scapes (flower twigs without leaves). Scapes were placed in holding solutions of 0.1M sucrose, 37.5 mM kinetin (KN), 37.5 mM salicylic acid (SA), KN (37.5 mM) + sucrose (0.1M), SA (37.5 mM) + sucrose (0.1M) and double distilled water (DDW). Untreated petals exhibited loss of turgidity and shrinkage earlier than those received treatments of either a sugar (sucrose) or a plant growth regulator (PGR) like KN or SA. Among the individual treatments, sucrose was the best followed by KN and SA in slowing down the reduction in flower diameter, starch depletion, sugar accumulation and increment in lipid peroxidation. Among the combined applications, KN in presence of sucrose showed more promising effect in delaying petal senescence of cut Aster flowers. This combination could also reduce a-amylase and peroxidase activity. Among all treatments the order of effectiveness was KN + sucrose > SA + sucrose > sucrose > KN > SA > DDW.
