银杏叶片叶绿体光能转换特性的变化  

Changes of Chloroplast Light-energy Conversion Characteristics on Leaves of Gingko

作　　者：徐艳丽[1] 陈国祥[1] 魏晓东[1] 雷华[1] 施大伟[1] 

机构地区：[1]南京师范大学生命科学学院,南京210046

出　　处：《植物研究》2008年第2期179-182,共4页Bulletin of Botanical Research

基　　金：教育部科学技术重点研究项目(204049)资助

摘　　要：以5年生雌、雄银杏为材料,研究了自然生长条件下银杏叶绿体光能转换特性的动态变化规律。结果表明:连体叶片的净光合速率在叶片生长40d达到最大值;随着叶片的展开,叶片叶绿素含量逐渐上升;叶绿体ATP含量伴随着光合磷酸化活力变化在叶片生长初期含量逐渐上升,叶片生长65d时最大;Mg2+、Ca2+-ATPase活力在叶片生长初期逐渐下降,生长50d后开始逐渐上升。实验结果也显示雌、雄银杏叶绿体光能转换能力比较相似,没有较大差异。The light-energy conversion characteristics of Gingko chloroplast in nature condition were investigated. The results showed that： photosynthetic rate and chlorophyll content of Gingko increased as leaf spreading. The content of ATP increased with the activity of photophorylation, keeping low content after germination, and having the maximum content of ATP after 65 days as leaves growing; Mg^2＋ ,Ca^2＋ -ATPase activity changed from high level to low after germination, and reached the lowest level after 50 days as leaves growing, then its activity ascend sluggishly. The results also showed that all light-energy conversion characteristics had the similar change in male and female.

关 键 词：银杏 叶绿体 光能转换特性 光合磷酸化 

分 类 号：Q945[生物学—植物学]