摘要
为探究LED光源在菜心贮藏保鲜期间对叶绿素合成代谢的影响,采用自发气调包装菜心,在室温(20±1.0)℃、相对湿度60%±5%条件下贮藏,以每天12 h光照强度(105±5)lx的LED蓝红光(465±5)nm照射包装菜心作为LED光照处理组,并以避光贮藏作为暗处理组,观察贮藏期间气调包装菜心叶绿素含量及其降解相关酶活性的变化。结果表明:贮藏期间,与暗处理组相比,LED光照处理能够有效减少菜心的失重,抑制菜心的呼吸强度和叶绿素降解相关酶(叶绿素酶(Chlase)、脱镁叶绿素酶(PPH)、叶绿素降解过氧化物酶(Chl-POX))活性,延缓了菜心叶绿素的降解,菜心的色泽品质在室温贮藏4 d后仍能保持新鲜。
The purpose of this study was to investigate the effects of LED light source on chlorophyll synthesis and metabolism of Chinese flowering cabbages during storage.The Chinese flowering cabbages were packaged using modified atmosphere packaging and stored under(20±1.0)℃and relative humidity of 60%±5%.The cabbages irradiated by LED blue light(465±5)nm for 12 hours per day were used as LED light treatment group,and that under dark light treatment were regarded as dark treatment group,subsequently,the changes of chlorophyll contents and degrading enzymes activities of during storage were observed.The results showed that the LED light treatment could effectively reduce the weight loss rates and respiratory intensities of modified atmosphere packaging cabbages compared with dark treatment group during storage.Besides,the activities of chlorophyll degradation related enzymes including Chlase,PPH and Chl-POX in LED light treatment group were significantly decreased compared with that in dark treatment group,and the degradation of chlorophyll was delayed,resulting in the fresh color and qualities of Chinese cabbages after 4 days storage at room temperature.
作者
罗政
许超群
陈飞平
王玲
张惠娜
陈于陇
LUO Zheng;XU Chao-qun;CHEN Fei-ping;WANG Ling;ZHANG Hui-na;CHEN Yu-long(Key Laboratory of Agro-Products Postharvest Handling,Ministry of Agriculture and Rural Affairs,Beijing 100125,China;Guangdong Key Laboratory of Agricultural Products Processing,Sericultural&Agri-Food Research Institute,Guangdong Academy of Agricultural Sciences,Key Laboratory of Functional Foods,Ministry of Agriculture and Rural Affairs,Guangzhou 510610,China)
出处
《保鲜与加工》
CAS
2021年第7期8-16,共9页
Storage and Process
基金
农业农村部重点实验室开放课题(KLAPPH-2019-01)
广东省重点领域研发计划项目(2019B020222001)
广东省农业科学院新兴学科团队建设项目(201805XX)。
关键词
LED光照
呼吸强度
叶绿素
菜心
酶活性
LED illumination
respiratory intensity
chlorophyll
Chinese flowering cabbages
enzymes activities
