摘要
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（Fv/Fm）和PSⅡ潜在活性（Fv/Fo）值显著高于其他3个品种。在不同光照强度（PAR,0～2 847μmol·m-2·s-1）下,实际光合量子产量〔Y（Ⅱ）〕、有效光合量子产量（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。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Y（Ⅱ）、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。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。
In this research, some cuhivars of Lycium barbarum were taken as the materials. In the field experi- ment, the chlorophyll fluorescence parameters and the chlorophyll contents in the cuhivars of L. barbarum were studied using the chlorophyll fluorescence measuring technique. The results revealed that the maximal photochemical efficiency of PS I1 （Fv/Fm） and potential activity of PS 11 （Fv/Fo） of Ningqi No. 2 were remarkably higher than those of other three cuhivars. The actual photosynthesis yield （ Y（ 11 ） ）, activity photosynthesis yield （ Fv＇/ Fro＇）, photochemical quenching （qP） and electron transport rate （ETR） were significantly different from different cuhivars 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 ETR was similar to the change trend of ETR. The content of Chlorophyll a, Chlorophyll b and Chloro- phyll a ＋ b in Ningqi No. 2 were the highest. There was an extremely significant or a significant positive correlation between chlorophyll a ＋ b and Y（ ]I ）, Fv＇/Fm＇, qP and ETR, but a negative correlation with NPQ. So it could be concluded that Niugqi No. 2 had a higher physiological activity of PS II and physiological basis of potential biomass, the photosynthesis capability of all the four cuhivars was strong. The photochemical efficiency of Ningqi No. 1 was weaker, and it was easy to suffer from photo inhibition at high light intensity.
出处
《干旱区研究》
CSCD
北大核心
2014年第3期550-555,共6页
Arid Zone Research
基金
引进林业科学技术项目(948项目2011-4-39)
关键词
枸杞
叶绿素含量
叶绿素荧光参数
甘肃
Lycium barbarum
chlorophyll content
chlorophyll fluorescence parameter
Gansu province
