摘要
以美早/Colt为试材,研究了NO3-对淹水条件下甜樱桃叶绿素荧光的影响。结果表明:甜樱桃各处理的光系统II(PSII)原初光能转化效率(Fv/Fm)、光系统活性(Fv/Fo)和光化学猝灭系数(qP)在淹水过程中出现降低-增加-降低的趋势;NO3-处理在淹水第2天开始能减缓Fv/Fm、Fv/Fo和qP下降趋势;NO3-处理的非光化学猝灭系数(qN)在淹水期间都高于对照。表明淹水过程中NO3-一方面提高了光能转换效率和PSII的潜在活性,另一方面增强了过剩光能的非光化学耗散,有利于保护光合机构免受环境胁迫的破坏。
Effect of NO3^- on the Chlorophy II Fluorescence of the meizhao/coh under waterlogging was studied. The results showed that with the increase of waterlogging, （Fv/Fm）, Fv/Fo and （qP） had the trend of decrease -increase-decrease. Exogenously applied NO3^- alleviated the decrease of Fv/Fm, Fv/Fo and qP. qN on The treatment of NO3^- were higher than CK. The light energy conversion efficiency, and potential activity of photosynthetic reaction center and the non-photochemical dissipation of excess light enemy, which resisted the damage on photosynthetic apparatus of environmental stress, was improved.
出处
《中国农学通报》
CSCD
北大核心
2009年第19期142-146,共5页
Chinese Agricultural Science Bulletin
基金
山东省良种工程
关键词
淹水
NO3-
叶绿素荧光
waterloging, nitrate-nitrogen, Chlorophy Ⅱ Fluorescence
