Table 3
Effect of heat treatments on the respiration rate and ethylene production in fresh-cut ‘Romaine’ lettuce during storage at 5℃

	Respiration rate (CO₂mL/kg․hr)			Ethylene production (C₂H₄μL/kg․hr)
	0day	4days	5days	0day	4days	5days
CT²⁾	-	51.9±5.0^a1)	47.1±4.4^ab	2.5±1.1^a	28.0±5.9^ab	4.7±1.5^b
45℃		53.8±3.1^a	58.4±11.1^a		29.2±2.5^a	17.3±3.7^a
50℃		60.1±2.0^a	61.3±0.1^a		8.6±3.1^d	5.5±3.6^b
55℃		58.5±4.0^a	41.9±1.5^b		18.0±7.1^bc	6.4±1.1^b

¹⁾Mean with different superscript letters in the same column are significantly different at the 5% level.
²⁾CT, Room temperature water treatment.