CO_2浓度倍增对宁夏枸杞叶绿素荧光参数的影响  

Effects of doubled CO_2 concentration on chlorophyll fluorescence parameters in Lycium barbarum leaves

作　　者：石元豹[1] 曹兵[1] 

机构地区：[1]宁夏大学农学院,宁夏银川750021

出　　处：《经济林研究》2015年第3期108-111,共4页Non-wood Forest Research

基　　金：国家自然科学基金项目"大气CO2浓度倍增对宁夏枸杞光合产物分配的影响机制"(31160172)

摘　　要：为了了解气候变化对枸杞光合作用的影响,以宁夏枸杞苗木为试验材料,采用开顶式气室模拟控制CO2浓度,设置倍增CO2浓度(720±20μmol/mol)和自然环境大气CO2浓度(360±20μmol/mol,对照)处理,测定2种处理下枸杞叶片叶绿素荧光参数,分析其变化。结果表明:CO2浓度倍增处理对宁夏枸杞叶片的初始荧光(F0)无显著影响,而最大荧光(Fm)、PSII的潜在光化学活性(Fv/F0)、PSII的最大光化学效率(Fv/Fm)、表观光合电子传递速率(RET)、PSⅡ实际光化学量子产量(ΦPSII)均显著增加,说明CO2浓度倍增可以提高枸杞叶片的光能转化效率以及光能利用率,增强其光合能力。In order to learn effects of climate change on photosynthesis in Lycium barbarum, taking L. barbarum seedlings as research materials, chlorophyll fluorescence parameters in L. barbarum leaves were determined under the two treatments of doubled CO2 concentration and atmospheric CO2 concentration under natural environment （CK）, and changes of the parameters were analyzed. Doubled CO2 concentration （720＆#177;20μmol/mol） was controlled by using open top chamber, and atmospheric CO2 concentration under natural environment was 360＆#177;20μmol/mol. The results showed that compared with the control, doubled CO2 concentration treatment had no significant effects on initial fluorescence （F0） in L. barbarum leaves, and maximum fluorescence （Fm）, PSII potential photochemical activity （Fv/F0）, PSII maximum photochemical efficiency （Fv/Fm）, apparent photosynthetic electron transfer rate （RET）, and PSII actual photochemical quantum yield （ΦPSI ） were significantly increased. So doubled CO2 concentration could enhance conversion efficiency and utilization rate of light energy in L. Barbarum leaves, and could strengthen photosynthetic capacity.

关 键 词：CO2浓度倍增 宁夏枸杞 叶绿素荧光 光能利用率 

分 类 号：S663[农业科学—果树学]