|Online ISSN : 2349-8080
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Department of Botany, Kurukshetra University, Kurukshetra - 136119, India
Selecting 0.1 M sucrose solution and two concentrations (4mM and 40mM) of kinetin (Kn) and salicylic acid (SA), roles of the sugar and two plant growth regulators (PGRs) were assessed and compared individually as well as in combination in the regulation of petal senescence in Matricaria parthenium L. Among these chemical compounds (one metabolite and two concentrations each of two PGRs), 0.1M sucrose was the most effective individually as holding solution to minimize reduction in flower diameter and starch content. Maximum decline in a-amylase activity, lipoxygenase activity and MDA content was brought by sucrose. Higher concentration of both PGRs was also very effective. Further, in combined applications both Kn and SA could induce additive effects in presence of sucrose to make the flower more turgid, fresh with larger diameter even after 6-day. Kinetin at a concentration of 40mM along with sucrose (0.1M) was the best in keeping least reduction in the amount of starch while maintaining relatively lower values of lipoxygenase activity and MDA content in comparison to other holding solutions. This combined application was able to delay petal senescence in cut flower quite effectively.