Invertase inhibitor-control of sucrose transport from carnation petals to other flower parts

An investigation was made of the distribution of metabolites in the receptacles and ovaries, and the activity of an invertase inhibitor after feeding the petals with ¹⁴C-sucrose and cycloheximide during the natural aging of cut carnation flower. The cycloheximide treatment blocked the synthesis of the invertase inhibitor in petals and maintained a relatively high level of invertase activity during flower senscence. Treatment with cycloheximide decreased the movement of radioactivity from petals to receptacles and ovaries from 7 to 10 times, compared to non-treated control flowers. IAA applied on the stigma had no influence on synthesis of the inhibitor and distribution of the radioactivity.