Recent studies showed that nitric oxide (NO) functions as an essential endogenous plant signal molecule.
In this study, the regulatory role of NO during the flower senescence of cut rose (Rosa hybrida L. ‘Kardinal’)
was surveyed. Exogenous application of the NO donor sodium nitroprusside (SNP) could increase vase life
and maximum flower diameter and its effects were dose and time dependent. Treatments with 200 M
of SNP for 24 h obtained the maximum vase life and flower diameter.