Effects of free sterols on the fluidity of polar lipids in rice dry embryo  

作　　者：YANG Ling and SU Weiai Biology Department of Zhejiang Normal University, Jinhua 321004, China Shanghai Institute of Plant Physiology , Chinese Academy of Sciences , Shanghai 200032 , China 

出　　处：《Chinese Science Bulletin》1999年第10期933-937,共5页

摘　　要：Free sterols from rice dry embryo reduce the onset phase transition temperature and widen the transition range of total polar lipids and phosphatidylglycerol, which increases the membrane fluidity below their phase transition temperature and decreases the fluidity of membranes above their phase transition temperature. And 50% of free sterols result in a complete disappearance of phase transition. The fluidity of other main components of polar lipids is decreased by free sterols above 0℃. The results confirm that free sterols can modulate membrane lipid fluidity.Free sterols from rice dry embryo reduce the onset phase transition temperature and widen the transition range of total polar lipids and phosphatidylglycerol, which increases the membrane fluidity below their phase transition temperature and decreases the fluidity of membranes above their phase transition temperature. And 50% of free sterols result in a complete disappearance of phase transition. The fluidity of other main components of polar lipids is decreased by free sterols above 0°C. The results confirm that free sterols can modulate membrane lipid fluidity.

关 键 词：free STEROL membrane LIPIDS FLUIDITY RICE embryo. 

分 类 号：Q944.4[生物学—植物学]