低温弱光下k-1杂交酸模叶绿素荧光及膜脂脂肪酸的变化  

Changes of Chlorophyll Fluorescence and Fatty Acid Compesition of Phosphatidylgl ycerol in Rumex Leaves during Low Temperature and Weak Light Stress

作　　者：代玉华[1] 代金明[1] 孟庆伟[1] 

机构地区：[1]山东农业大学生命科学学院,泰安271018

出　　处：《园艺学报》2003年第5期595-597,共3页Acta Horticulturae Sinica

基　　金：国家重点基础研究发展规划项目 (G19980 10 10 0 );国家自然科学基金项目 (3 0 0 70 458);山东省自然科学基金项目 (Q99D10 )

摘　　要：低温弱光胁迫下黄瓜叶片的最大光化学效率 (Fv/Fm)和实际光化学效率 (Fv /Fm )急剧下降 ,而酸模叶片的Fv/Fm和ФPSII只轻微下降。低温处理后 ,酸模PG饱和脂肪酸含量下降 ,有利于提高膜的稳定性 ;Trans 3 16∶1含量下降程度不大 ,LHCⅡ寡聚体解聚程度不严重 。During low temperature and weak light stress,Fv/Fm and ФPSII in Rumex leave s were higher than that in cucumber leaves.Content of saturated fatty acids of P G in Rumex leaves decreased under low temperature and weak light,which is be nefited to enhance membrane stability under low temperature.Trans-3-16∶1 in Rumex leaves decreased less than in cucumber under stress,indicating the sli ght degradation of LHCII oligmer.This might be important for Rumex to mainta in higher photochemical activity under low temperature.

关 键 词：温度 光照 K-1杂交酸模 叶绿素 荧光 膜脂脂肪酸 寡聚体 黄瓜 叶片 光化学效率 

分 类 号：S642.2[农业科学—蔬菜学]