银杏、金钱松PSⅡ颗粒放氧活性及多肽组分的研究  

Photosynthetic O 2-Evolving Activity and Polypeptides Composition of PSⅡ Particles From Gymnosperm-Ginkgo and Pseudoiarix

作　　者：陈国祥[1] 刘冬[1] 戴群[1] 许晓明 范晓苹 

机构地区：[1]南京师范大学生物系

出　　处：《南京师大学报（自然科学版）》1996年第3期59-62,共4页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省科学基金

摘　　要：以银杏、金钱松为裸子植物的代表性实验材料对其ＰＳⅡ光合放氧及多肽组分进行了研究，和菠菜相比较，银杏、金钱松ＰＳⅡ放氧活性较低，分别为菠菜的１０％和３５％左右．对银杏、金钱松的ＰＳⅡ多肽组与分析发现，其多肽组分较复杂，和被子植物菠菜相比较，多肽数量多，且含有分子量为６５０００、６１０００、５２０００的大分子多肽．小分子多肽也存在一定的差异．We prepared PSⅡ particles from gymnosperm--Ginkgo and Pseudolarix. The preparation showed O 2-evolution activity of 11.7 and 38.60 O 2·μmol mg -1 Chl h -1 . The O 2-evolution activity were 10% and 35% that of Spinach PSⅡ particles respectively. Densitometer traces of SDS-PAGE indicated Ginkgo PSⅡ particles contained 11 polypeptides and Pseudolarix PSⅡ particles contained 9 polypeptides. The results demonstrated that the high-molecular weight polypeptides in gymnosperm (Ginkgo, Pseudolarix) PSⅡ particles were not found in angiosperm (Spinach) PSⅡ particles.

关 键 词：银杏 金钱松 PSⅡ颗粒 多肽 放氧活性 

分 类 号：Q949.6[生物学—植物学]