夜景照明对5种蔷薇科植物叶绿素荧光参数影响的差异研究

Effects of Night Illumination on Chlorophyll Fluorescence Parameters of 5 Species of Plants in Rosaceae

为了分析夜景照明对景观植物生长发育的影响及合理种植景观植物,以5种常见蔷薇科校园绿化植物为材料,测定比较了5种植物之间荧光参数的差异,分析了叶片快速光响应曲线和快速荧光诱导动力学曲线。结果表明:5种测试植物叶片叶绿素荧光参数Fo、Fm、NPQ的种间差异达到了显著水平(P<0.05),Fv/Fm、Fv/Fo、Fm/Fo、QY的种间差异达到了极显著水平(P<0.01),红叶李和樱桃的荧光参数值较高,酸梅的则较低;快速光响应曲线(LC)中红叶李和樱桃在20μmol/(m2·s)时有一个拐点,说明红叶李和樱桃的光补偿点(LCP)在20μmol/(m2·s)左右,其它植物的LCP都低于10μmol/(m2·s);快速荧光动力学曲线(OJIP)表明各品种O点荧光差异不明显,随着时间的推移,J点开始出现差异,到P点差异达到最大,以红叶李的荧光值最高。综合分析以上结果,红叶李最适合该区域夜景照明下的环境。

In order to analyze the effect of night illumination on the growth and development of landscape plants and to rea- sonably plant landscape plants, the author compared the differences in leaf chlorophyll fluorescence parameters among 5 species of common green plants in Rosaceae, and analyzed the rapid light response curve and rapid chlorophyll fluorescence induction kinetic curve of leaves. The results showed that： among these 5 species of plants, there were significant differences in leaf chloro- phyll fluorescence parameters Fo, Fm and NPQ （P〈0.05）, and extremely significant differences in Fv/Fm, F,/Fo, Fm/Fo and QY （ P〈0.01 ）. The leaf chlorophyll fluorescence parameters of Prunus cerasifera and cherry were higher, while those of dark plum were lower. In the rapid light response curves of P. cerasifera and cherry, there was an inflection point at 20 p.mol/（ m2 ·s ） , sug- gesting the light compensation point （LCP） of these 2 species of plants was about 20 μmol/（ m2 · s）. The LCPs of the other plants were all less than 10 μmol/（ m2 · s）. In the rapid chlorophyll fluorescence kinetic curves, the difference in O-point fluo- rescence value was not obvious among 5 species of plants, but the difference in J-point fluorescence value started to appear as the time went on, and the difference in P-point fluorescence value reached the maximum; P. cerasifera had the highest rapid chloro- phyll fluorescence value at P point. The above results indicate that P. cerasifera is most suitable for the night illumination environ- ment in this region,