摘要
在自发气调(MA)贮藏期间,不同时间(0、15、30d)加入外源乙烯处理(50～80μl/L),研究大久保桃果实的呼吸、乙烯和色素的变化。结果表明,MA贮藏过程中,桃果实的呼吸和乙烯释放很低,而且变化值未表现出高峰,外源乙烯处理诱导了贮藏期和货架期桃果实内源乙烯的释放,增强了果实的呼吸强度;外源乙烯处理时间越早,桃果实的呼吸强度、乙烯释放量高峰出现越早或者峰值越高;外源乙烯处理促进了桃果实果皮叶绿素的降解,抑制了类胡萝卜素的快速下降,使桃果实正常着色。以上结果说明外源乙烯处理对于减轻桃果实低温贮藏冷害具有明显的作用。考虑到外源乙烯减轻低温冷害和促进果实衰老的双重作用,在时间上以贮藏30d时进行外源乙烯处理效果最好。
＇Okubo＇ peach （Prunuspersica L.Batsch） fruits were treated with exogenous ethylene（50 - 80 μl/L） at different time points （0, 15 and 30 d） during modified atmosphere （MA） storage. Respiration, ethylene release and pigment alternation of peach fruits were monitored. Results showed that the respiration intensity and ethylene release rate of peach fruits without application of exogenous ethylene were low and no obvious alterations were observed during MA storage. However, exogenous ethylene treatment stimulated the synthesis of endogenous ethylene and improved respiration intensity of peach fruits during MA storage. An earlier treatment with exogenous ethylene for peach fruits induced an earlier and higher peak for respiration intensity and ethylene release. Exogenous ethylene treatment also promoted the degradation of chlorophyll and inhibited the rapid decline of carotenoids in peach peel so that peach fruits exhibited normal color. All of these investigations indicated that exogenous ethylene treatment had a significant effect on alleviating chilling-injuries of peach fruits. Due to the dual effects on inhibiting chilling-injuries and accelerating caducity of peach fruits using exogenous ethylene treatment, the best time to apply exogenous ethylene should be at 30 days after MA storage.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第20期459-463,共5页
Food Science
基金
“十一五”国家科技支撑计划项目(2006BAD22B04)
关键词
外源乙烯
乙烯释放量
呼吸强度
叶绿素
类胡萝卜素
exogenous ethylene
ethylene release
respiration intensity： chlorophyll
carotenoids
