Ethylene Production and Sensitivity
Passion fruit produce very high levels of ethylene, 160 to
400 μL kg-1 h-1 at 20°C (68°F) at their climacteric peak
(Shiomi et al. 1996). Exposure to 100 μL L-1 ethylene
for 24 h accelerates ripening (Arjona and Matta 1991,
Akamine et al. 1957). Methylcyclopropene (1-MCP),
when applied to green and yellowish-green fruit, delays
ripening, decreases respiration, and maintains fruit quality.
No significant response occurs when 1-MCP is applied
to fruit with >50% colour (Schotsmans et al. 2008)