干旱区研究2011，Vol.28Issue(4)：649-654,6.
模拟水、盐胁迫对沙棘幼苗PSII活力影响的对比研究
Comparative Study on Effects of NaCl and Polyethylene Glycol on PSII Activity of Hippophae rhamnoides
摘要
Abstract
Effects of polyethylene Glycol（PEG-6000） and NaCl on PSII activity of Hippophae rhamnoides were investigated by an experiment carried out in greenhouse.Both NaCl and PEG exposure restricted the electron transfer in acceptor,resulted in a decrease of energy yield into electron transfer chain.The two stresses still caused the decrease of chlorophyll content,but had no effect to the density of active photosynthetic reaction centers（RC/CSo）.Compared with PEG treatment,NaCl exposure was higher in absorption flux,trapped energy flux and electron transport flux per excited reaction center（ABS/RC,TRo/RC,ETo/RC）,but it had lower value in performance index（PIABS） due to the decrease in electron transport（φEo）,probability that a trapped exciton moves an electron into the electron transport chain beyond Q-A（Ψo）.Our results suggested that NaCl inhibited more intensely the PSII activity than PEG,as had close relation with specific ion effect of NaCl.关键词
沙棘（Hippophae/rhamnoides）/水分胁迫/盐分胁迫/PSII活力Key words
Hippophae rhamnoides/water stress/salt stress/PSII activity分类
农业科技引用本文复制引用
李利,吕湘芳,潘响亮,李宏,陈宝军..模拟水、盐胁迫对沙棘幼苗PSII活力影响的对比研究[J].干旱区研究,2011,28(4):649-654,6.基金项目
国家重点基础研究发展计划项目(2006CB705809)资助 （2006CB705809）
