遮光对青榨槭光合速率及叶绿素荧光参数的影响  

Effects of Shading on Net Photosynthetic Rate and Chlorophyll Fluorescence Parameters of Leaf in David Maple(Acer davidii Franch.)

作　　者：缴丽莉[1] 路丙社[1] 周如久[1] 白志英[1] 梁海永[2] 甄红伟[3] 

机构地区：[1]河北农业大学园林与旅游学院,河北保定071000 [2]河北农业大学林学院,河北保定071000 [3]河北农业大学西陵林场,河北易县074200

出　　处：《园艺学报》2007年第1期173-178,共6页Acta Horticulturae Sinica

基　　金：河北省林业局资助项目(0406260)

摘　　要：研究了遮光15%、35%、50%和全光照处理对青榨槭新梢生长、叶片色素含量、净光合速率以及叶绿素荧光参数的影响。结果表明,随着遮光度增加,叶片色素含量增加,叶绿素a/b减小;叶片净光合速率(Pn)、初始荧光(Fo)、原初光能转化效率(Fv/Fm)和光化学猝灭系数(qP)增加,但非光化学猝灭系数(qN)降低。全光照和遮光15%处理条件下,Pn日变化呈双峰曲线,而35%和50%处理条件下呈单峰曲线;遮光35%和50%处理条件下Fv/Fm日变化幅度较小,15%和全光照处理条件下Fv/Fm日变化呈先上升后下降再上升趋势。50%遮光处理青榨槭幼苗Pn最高,新梢年生长量最大,可在育苗生产中应用。The shoot growth and the pigment content, net photosynthetic rate, transpiration rate and chlorophyll fluorescence of leaf under different shading treatments （0%, 15% , 35% and 50% ） were investigated in david maple seeding. The results showed that the pigment content, net photosynthetic rate, minimal fluorescence （Fo）, conversion efficiency of primary light energy （Fv/Fm） of PS Ⅱ and photochemical quenching coefficient （qP） were enhanced, but the non-photochemical quenching coefficient （qN） was decreased as shading increased. The diurnal variation curve of net photosynthetic rate had two peaks under 0% and 15% shading treatments, while there was only one peak under 35% and 50% shading treatments. The diurnal variations of Fv/Fm showed increase-decrease-increase curve under 0% and 15% shading treatments, and kept stable in 35% and 50% shading treatments. It is concluded that 50% shading suitable for the growth of david maple seedlings.

关 键 词：青榨槭 遮光 色素 光合作用 叶绿素荧光 

分 类 号：S68[农业科学—观赏园艺]