不同冷藏温度对采后菠菜叶片衰老和活性氧代谢的影响  

Effects of Different Storage Temperatures on Postharvest Spinach Leaves Senescence and Active Oxygen Metabolism

作　　者：田莹[1] 侯建设[1] 李丹[1] 

机构地区：[1]海军医学研究所,上海200433

出　　处：《保鲜与加工》2013年第1期9-14,共6页Storage and Process

摘　　要：研究了菠菜采后在2℃和9℃下冷藏期间叶绿素含量、色度值(a*、b*和色调角)、活性氧清除酶(SOD、CAT、POD、APX和GR)活性和丙二醛(MDA)含量的变化。结果表明,两种贮藏温度下菠菜叶片的SOD活性总体呈上升趋势;9℃温度条件下菠菜叶片的叶绿素含量、色调角值、CAT、APX和GR活性迅速下降,而膜脂过氧化产物MDA快速积累;2℃的低温条件可延缓CAT、APX和GR活性的下降,阻止膜脂过氧化产物MDA的上升,抑制叶绿素含量和色调角值的下降,从而延缓菠菜的衰老。The changes of chlorophyll content, chroma value （a^＊, b^＊ and hue angle）, activity of the active oxygen scavenging enzymes （SOD, CAT, POD, APX and GR） and content of malondialdehyde （MDA） of postharvest spinach during 2 ℃ and 9 ℃ cold storage were studied. The results showed that, during storage at the two temperatures, the activity of SOD was overall upward trend, during 9 ℃ storage, the content of chlorophyll, hue angle values, activity of CAT, APX and GR of spinach leaf decreased rapidly, and the membrane lipid peroxidation product MDA rapidly accumulated, during 2 ℃ cold storage, the low temperature could delayed the activities decrease of CAT, APX and GR, prevent the rapid increase of membrane lipid peroxidation product MDA, inhibit the decreases of chlorophyll content and hue angle value, and thereby delay the senescence of spinach.

关 键 词：菠菜 冷藏 衰老 活性氧代谢 

分 类 号：S636.1[农业科学—蔬菜学]