3个钓钟柳品种叶绿素荧光特性比较

摘要

The chlorophyll fluorescence parameters change of the Penstemon was studied, the aim was to enhance its planting management for the region in east China. Chlorophyll fluorescence parameters [minimal fluo rescence(Fo), maximum fluorescence (Fm), photochemical quenching (qp), variable fluorescence (Fv), yield (Y), non photochemical quenching (NPQ), and electron transport rate (ETR) ] of Penstemon campanulatus ‘Purple Passion' , Penstemon digitalis ‘Husker Red' , and Penstemon barbatus ‘Rondo' , all perennial root flowers, were measured and compared by the chlorophyll florescence measuring technique. A correlation analysis was conducted. Results of the correlation analysis showed significant positive correlations between Fo and Fm, qp and Fm, qp and Fv, Y and ETa, Fm and Fv, Fo and F, and Fm and Y; significantly negative correlations were found between Fo and ETR and Fv/Fo and Y. Also, chlorophyll fluorescence parameters for the three cultivars were significant(P ＜ 0.05) and highly significant (P ＜ 0.01 ). The values of Fv, Fv/Fm, Fv/Fo, Y,ETR, qp, and Nm for the three cultivars were in the order: ‘Purple Passion' ＞ ‘Rondo' ＞ ‘Husker Red'. Thus, the photosynthetic physiological functions of P. campanulatus ‘Purple Passion' were best.%利用叶绿素荧光测定技术测定了多年生宿根花卉紫红钓钟柳penstemon campanulatus'Purple Passion',毛地黄钓钟柳P.digitalis'Husker Red'和五彩钓钟柳P.barbatus'Rondo'等3个钓钟柳品种的叶绿素荧光参数,并对它们进行比较.结果表明:3个钓钟柳品种间的叶绿素荧光参数均达到显著或极显著水平,紫红钓钟柳的可变荧光(Fv),光系统Ⅱ原始光能转化效率(Fv/Fm),光系统Ⅱ的潜在活性(Fv/Fo),光合量子产额(Y),表观光合电子传递速率(ETR),光化学猝灭系数(qp),非炮化学猝灭系数(NPQ)值最高,其次为五彩钓钟柳,最低是毛地黄钓钟柳.说明紫红钓钟柳具有较好的光合生理功能,其次是五彩钓钟柳,最差是毛地黄钓钟柳;相关分析表明:Fo与 Fm,qp与Fm,qP与Fv,Y 与ETR,Fm与Fv,Fo与F(任意期间实际荧光产量),Fm′与Y呈显著正相关或极显著正相关;Fo与ETR,Fv/Fo与Y呈显著负相关.