不同枸杞品种叶绿素荧光参数差异分析

在田间试验条件下, 以宁杞1号、宁杞2号、大麻叶和蒙杞1号为材料，采用叶绿素荧光技术测定了不同枸杞品种的叶绿素荧光参数，并测定供试品种的叶绿素含量。结果表明：宁杞2号的PSⅡ最大光化学效率WTBX]（Fv/Fm）WTBZ]和PSⅡ潜在活性WTBX]（Fv/Fo）WTBZ]值显著高于其他3个品种。在不同光照强度(PAR，0～2 847 μmol·m-2·s-1)下，实际光合量子产量WTBX]〔YWTBZ]（Ⅱ）〕、有效光合量子产量WTBX]（Fv′/Fm′）、光化学淬灭系数(qP)和表观电子传递速率(ETR) 的变化差异显著，其中宁杞2号最大，其次是蒙杞1号和大麻叶，最小的是宁杞1号。拟合参数ETR变化的初始斜率α与ETR的变化趋势一致。WTBZ]宁杞2号的叶绿素a、总叶绿素的含量也最高。叶绿素总含量与WTBX]YWTBZ](Ⅱ)、WTBX]Fv′/Fm′、 qP和ETR成极显著或显著正相关，与非光化学淬灭系数（NPQ）成负相关。WTBZ]JP2]由此得知，在特定环境下供试品种中宁杞2号有较高的PSⅡ生理活性和潜在生物产量的生理基础，光合能力最强；其次是蒙杞1号和大麻叶，宁杞1号较弱。

Parameter Difference of Chlorophyll Fluorescence in Leaves  of Different Cultivars of Lycium barbarum

In this research, some cultivars of WTBX]Lycium barbarumWTBZ] were taken as the materials. In the field experiment, the chlorophyll fluorescence parameters and the chlorophyll contents in the cultivars of WTBX]L. barbarumWTBZ] were studied using the chlorophyll fluorescence measuring technique. The results revealed that the maximal photochemical efficiency of PSⅡ WTBX](Fv/Fm)WTBZ] and potential activity of PSⅡ WTBX](Fv/Fo)WTBZ] of Ningqi No.2 were remarkably higher than those of other three cultivars. The actual photosynthesis yield WTBX](YWTBZ](Ⅱ)), activity photosynthesis yield WTBX]（Fv′/Fm′）,WTBZ] photochemical quenching WTBX](qP)WTBZ] and electron transport rate WTBX](ETR)WTBZ] were significantly different from different cultivars under a photo synthetically active radiation of 0-2 847 μmol·m-2·s-1, and they were the highest in Ningqi No.2, followed by Mengqi No.1 and Damaye, and the lowest in Ningqi No.1. The initial slope α of fitting parameter WTBX]ETRWTBZ] was similar to the change trend of WTBX]ETR.WTBZ] The content of Chlorophyll a, Chlorophyll b and Chlorophyll a+b in Ningqi No.2 were the highest. There was an extremely significant or a significant positive correlation between chlorophyll a+b and WTBX]YWTBZ](Ⅱ), WTBX]Fv′/Fm′, qPWTBZ] and WTBX]ETR,WTBZ] but a negative correlation with WTBX]NPQ.WTBZ] So it could be concluded that Ningqi No.2 had a higher physiological activity of PS II and physiological basis of potential biomass, the photosynthesis capability of all the four cultivars was strong. The photochemical efficiency of Ningqi No.1 was weaker, and it was easy to suffer from photo inhibition at high light intensity.