摘要
采后的成熟杨梅在３～６天内出现明显的衰老代谢特征，表现为膜透性增加，超氧物歧化酶（ＳＯＤ）活性下降，丙二醛（ＭＤＡ）含量上升，多胺（ＰＡＳ）含量下降。贮藏温度越高，衰老代谢指标的变化越强烈。多胺含量的变化还提示，在采后果实的多胺代谢中，可能存在着某种抗衰老的应激机制。
The ethylene production, respiratory rate, membrane permeability, superoxide dismutase (SOD) activity, malondialdehyde (MDA)and polyamine content of Chinese bayberry (Myrica rubra Sieb. and Zucc.) during storage were determined in this study. After 3～6 day storage the membrane permeability and MDA content increased whereas the SOD activity and polyamine content decreased rapidly, showing clearly the occurrence of senescence metabolism.At high temperatures the metabolism was accelerated. The short storage life of Chinese bayberry can thus be explained in view of postharvest physiology.Changes of polyamine content illustrated that an excitation mechanism of antisenescence was most likely present in polyamine metabolism.
出处
《园艺学报》
CAS
CSCD
北大核心
1994年第3期213-216,共4页
Acta Horticulturae Sinica
关键词
杨梅
采后生理
衰老
贮藏
Chinese bayberry
Postharvest physiology
Senescence
