摘要
以田间生长的鲁白８号大白菜为试材，研究了光下酶及叶绿素荧光对其叶片光合机构的保护作用。结果表明，ＭＤＡ含量一日间随ＰＦＤ的增加而增加，同时ＳＯＤ、ＣＡＴ与ＰＯＤ的活性也随ＰＦＤ的增加而增强，Ｆｖ与Ｆｖ／Ｆｍ却随ＰＦＤ的增加呈明显的低谷曲线，表明光下大白菜叶片发生膜脂过氧化。但ＳＯＤ、ＣＡＴ与ＰＯＤ可积极作用，清除有毒物质ＭＤＡ，同时叶绿素荧光可能耗散部分光能，减轻过强光照对膜的破坏作用。
In early heading stage of Chinese cabbage, diurnal variation of content of MDA and activities of SOD, CAT, POD and chlorophyll fluorescent parameters Fv and Fv/Fm were investigated with cultivar “Lubai No 8”under field contitions The results showed that the diurnal variation of MDA content and SOD, CAT and POD activities were singlepeak curves with an increment at 13:00 P M and chlorophyll fluorescent Fv and Fv/Fm were singlevalley curves Which indicate that SOD, CAT, POD and chlorophyll fluorescent may play important roles in protecting photosynthetic apparatus from the damaging effects of excessive light energy
出处
《西北农业学报》
CAS
CSCD
1998年第2期98-100,共3页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
大白菜
超氧物歧化酶
过氧化氢酶
叶绿素荧光
Chinese cabbage
Superoxide dismutase
Catalase
Peroxidase
Chorophyll fluorescence
