不同温度下樱桃番茄有氧呼吸速率的测定及其应用

Determination and Application of Aerobic Respiration Rates of Cherry Tomato at Different Temperature

目的 研究不同温度下樱桃番茄的呼吸速率,并用模型参数进行表征。方法 有氧条件下采用密闭系统,在温度为0~30℃内测定樱桃番茄在不同时间的气体体积分数,计算O_(2)的消耗速率和CO_(2)的生成速率。对樱桃番茄的呼吸过程用Michaelis-Menten模型的进行数学拟合。25℃下,应用呼吸速率模型选择樱桃番茄的最佳包装材料。结果 结果表明,樱桃番茄的呼吸速率符合Michaelis-Menten模型,决定系数R2均大于0.9,回归较好。樱桃番茄的呼吸动力学温度依赖性可以用Arrhenius方程进行表征,决定系数R2>0.99。同时应用Michaelis-Menten模型验证PE1和PE2 2种材料,得出PE1袋更适合作为樱桃番茄的包装材料。结论 Michaelis-Menten模型对樱桃番茄保鲜有重要意义。

The work aims to study the respiration rates of cherry tomatoes at different temperature and characterize the rates with model parameters.Under aerobic conditions,a closed system was adopted and the time-dependent gas concentrations of cherry tomatoes in the closed system were determined over the temperature range of 0-30°C to calculate the O2 consumption rate and CO2 generation rate.The respiration process of cherry tomatoes was mathematically correlated with enzymatic Michaelis-Menten model.The best packaging material of cherry tomatoes was selected by respiration rate model at 25°C.The results indicated that the respiration rate of cherry tomatoes was consistent with the Michaelis-Menten model.The determination coefficient R2 was greater than 0.9,and the regression was good.The temperature dependence of respiratory dynamics of cherry tomatoes could be characterized by Arrhenius equation and the determination coefficient was R2>0.99.At the same time,the Michaelis-Menten model was used to verify PE1 and PE2,and it was concluded that PE1 bag was more suitable for packaging cherry tomato.Michaelis-Menten model is important for cherry tomato preservation.