A circadian rhythm in CO2 production was observed in three cultivars o
f Anthurium andraeanum Andre ('Jaya', 'Fla-range','Leonette') flowers.
The rhythmicity was not affected by light, darkness, and detachment.
However, the amplitude was dampened in darkness and after detachment.
Spadix respiration accounted for 90% of the total flower respiration.
Rhythmicity in CO2 production continued after spathe removal. Less pro
nounced rhythmicity was observed following spadix removal.