华北农学报Issue(6)：172-176,5.DOI:10.7668/hbnxb.2014.06.029
持续NaCl胁迫对西洋菜叶绿素荧光参数与电子传递的影响
Effects of Continued NaCl Stress on Chlorophyll Fluorescence Parameters and Electron Transport of Nasturtium officinale R. Br.
摘要
Abstract
Our objective was to explore the effects of continued NaCl Stress on chlorophyll fluorescence param-eters and electron transport of Nasturtium officinale seedlings. Nasturtium officinale seedlings were treated with con-tinued NaCl(0,1,2,3,4 g/kg)in plastic pots with soil. We studied the effects of continued NaCl on growth,chloro-phyll content and chlorophyll fluorescence parameters after 60 days. The results indicated that with the increase of NaCl concentration in the range of 1-3 g/kg,Chlorophyll content and minimal fluorescence ( Fo) increased,while maximum fluorescence ( Fm) ,potential photochemical efficiency ( Fv/Fo) ,photochemical maximum efficiency of PSⅡ( Fv/Fm) and the ability of leaves to transform energy decreased;Moreover,the actual quantum yield Y (Ⅱ) de-creased,while non-photochemical quenching coefficient ( NPQ ) increased, and leaves maintained a high actinic light energy distribution by adjusting the heat dissipation;In addition,photochemical quenching coefficient ( qP) and electron transport rate (ETR) decreased,plastoquinone (QA) tended to be restored state,and the electron transfer was inhibited. 4 g/kg NaCl treatment caused the damage of PSⅡ,meanwhile,QA was restored excessively, electron transfer was obviously inhibited,energy conversion,transmission and distribution could not work normally, root to shoot ratio was decreased by 62. 5% compared to the control,and the growth of Nasturtium officinale was weakened significantly. All results suggested that the tolerance concentration of continued NaCl stress on Nasturtium officinale R. Br. was 3 g/kg.关键词
持续NaCl胁迫/西洋菜/叶绿素荧光参数/电子传递Key words
Continued NaCl stress/Nasturtium officinale R. Br./Chlorophyll fluorescence parameters/Electron transport分类
农业科技引用本文复制引用
唐剑,贺忠群,鞠丽萍,谭明明..持续NaCl胁迫对西洋菜叶绿素荧光参数与电子传递的影响[J].华北农学报,2014,(6):172-176,5.基金项目
四川省教育厅项目(10ZB044) （10ZB044）
