华山松叶绿素荧光诱导动力学参数的地理变异及其与树高生长的关系

 利用叶片体内荧光测定技术，检测了南北5个地区华山松种源的荧光诱导动力学参数。结果表明，南方种源具有较强的最大荧光(Fm)和可变荧光(Fv)，其光系统Ⅱ(PSⅡ)的潜在活性(Fv／Fo)与原初光能转换效率(Fv／Fm)也明显高于北方种源，并与其树高生长成正相关。另一方面，北方种源的非光化学荧光猝灭系数(QN)比南方种源要大，与它们的树高生长成反相关，而与纬度成正相关。这些实验结果说明，利用荧光诱导动力学技术，可以检测华山松的生长量潜力，在华山松种源选择中有较大的应用前景。

Geographical Variation in the Parameters of Chlorophyll Fluorescence Induction Kinetics of Pinus armandi and Its Relations With the Growth of Tree Height

The geographical variation in the chlorophyll fluorescence induction kinetics of Pinus armandi was studied by measuring the chlorophyll fluorescence of intact needles of five seed sources distributing from northern to southern China. Results show that P. armandi growing in southern China possessed the higher values of the maximum fluorescence (Fm),variable fluorescence (Fv)and FvFm. This is an indication of that potential activity of PS Ⅱ and the efficiency of light conversion were higher in southern populations than in northern populations, and positively correlated with the growth of tree height. On the contrary, the coefficients of non-photochemical fluorescence quenching (On) was negatively interrelated with the variation of growth. It was higher in southern population than in northern populations. These results demonstrate that the analysis of fluorescence induction kinetics is applicable to prediction of the potential growth of tree height, and to the selection of optimum seed sources of Pinus armandi.