Despite greatly reducing leaf abscission, 1-
MCP treatment did not render Polyscias fruticosa
‘Castor’ and Schefflera arboricola ‘Gold
Capella’ plants completely insensitive to exogenous
ethylene. For all three genotypes,
treatment with 1-MCP did not extend the
display life of control (0 mLL–1 1-MCP) plants
not exposed to exogenous ethylene. Levels of
leaf abscission and senescence for these control
plants were minor (0.2% to 2.4%) in the
absence of exogenous ethylene