3个钓钟柳品种叶绿素荧光特性比较

Chlorophyll fluorescence parameters in three cultivars of Penstemon

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。

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 fluorescence（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 ETR,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 NPQ 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.[Ch,1 fig.3 tab.16 ref.]