外源一氧化氮对盐胁迫下山葡萄叶片叶绿素荧光特性的影响  

Effects of Exogenous Nitric Oxide on Chlorophyll Fluorescence Characteristics in Vitis amurensis Leaves Under Salt Stress

作　　者：赵滢[1] 王振兴[1] 艾军[1] 秦红艳[1] 焦竹青[1] 张庆田[1] 

机构地区：[1]中国农业科学院特产研究所,吉林长春130122

出　　处：《北方园艺》2012年第17期33-35,共3页Northern Horticulture

基　　金：现代农业产业技术体系建设专项资助项目(nycytx-30-01);农业部科技攻关资助项目(NB2011-2130135-37)

摘　　要：采用营养液水培试验,研究了外源一氧化氮(NO)供体硝普钠(SNP)处理对盐胁迫下山葡萄‘双丰’1a生扦插苗叶片叶绿素荧光特性的影响。结果表明:外源NO提高了盐胁迫下山葡萄叶片PSⅡ的最大光化学效率(Fv/Fm)、PSⅡ实际光化学效率(ΦPSⅡ)和光化学猝灭系数(qP),降低了PSⅡ的激发能压力(1-qP);另外,在一定程度上提高了盐胁迫下最大潜在电子传递速率(rETRm)、半饱和光强(Ik)和快速光曲线的初始斜率(α)。表明外源NO通过减少过剩激发能的压力,提高了光合电子传递效率,减轻不可逆光抑制,进而缓解盐胁迫对山葡萄光合机构的伤害,提高其耐盐性。Nutrient solution hydroponics was adopted, the effects of sodium nitroprusside （SNP,an exogenous nitric oxide donor） on chlorophyll fluorescence characteristics in Vitis amurensis ＇Shuangfeng＇ leaves under salt stress were studied. The results showed that SNP increased photochemical efficiency of photosystem （Fv/Fm）, actual photochemical efficiency （~PSII） and photochemical quenching coefficient （qP）. However,SNP decreased excitation press （1-qP）. In addition,SNP improved maximal potential relative electron transport rate （rETRm）, semi-light saturation points （Ik） and initial slope （a） in different extent. The results of this study suggested that nitric oxide reduced excess excitation press, improved photochemical electron transport efficiency and alleviated the irreversib!e photoinhibition which was associated with an improvement in the actual PSI efficiency.

关 键 词：山葡萄 盐胁迫 一氧化氮 叶绿素荧光特性 

分 类 号：S663.1[农业科学—果树学]