摘要
以鸭梨果实为试料,采用高温(45℃)下光照变化以及田间不同驯化处理等方法,研究了其对鸭梨果实活性氧、抗氧化酶活性和抗氧化物质含量变化的影响,明确了鸭梨果实对温度光照互作的响应。结果表明:高温(45℃)下增加光照显著提高了果实内H2O2含量、DHA含量、膜相对透性和POD活性,抑制了SOD、APX、GR、MDAR活性和AsA含量的增加;未经驯化(摘叶和转位)处理果实的H2O2含量和膜相对透性显著高于树冠外围自然暴露果实,抗氧化酶活性无显著性变化。这表明高温下增加光照加重了对果实的伤害,经过驯化处理的果实的抗氧化性显著提高。
Under natural conditions,plants are exposed to different abiotic stresses.Fruit of Yali pears were taken as materials,in order to characterize the response of anti-oxidative systems to high temperature and excessive light,the reactive oxygen species（ROS）metabolism and the dynamic changes of antioxidant substance of Yali pears fruits were studied under light intensity and high temperature treatment,and different acclimating treatment.The results indicated that the rising of light intensity induced the increasing of H2O2 and DHA content,membrane permeability and POD activity,but the SOD,APX,GR and MDAHR activity and AsA content were inhibited.Without light acclimatization treatment,the H2O2 content of fruit was increased,but the oxidant enzyme（SOD,APX,GR,MDAHR）activity were not significantly changed.So that the membrane permeability of fruit under picking off leaves was higher than that of the exposure fruit of a tree outside canopy.
出处
《北方园艺》
CAS
北大核心
2016年第6期28-31,共4页
Northern Horticulture
基金
河北省自然科学基金资助项目(C02021003)
关键词
鸭梨
果实
温度
光照
抗氧化酶
温光互作
抗性
Yali
fruit
temperature
light
antioxidant enzyme
temperature-light factors
intensity
