摘要
为探究不同光强对地石榴叶片光合荧光参数的影响,以园林植物地石榴为试验材料,待其生长到稳定期后,测定仪测定地石榴的光合-光响应过程并测定叶绿素荧光参数和叶片快速光响应曲线(rapid light curves,RLCS)。结果表明,随着光强的增加,净光合速率(Pn)先呈上升趋势而后逐渐趋于稳定,气孔导度(Gs)和蒸腾速率(Tr)呈上升趋势,胞间CO2浓度(Ci)呈下降趋势;Pn与Gs、Tr具有极显著正相关(p<0.01)关系,与Ci呈极显著负相关(p<0.01);地石榴叶片的PSⅡ原初光能转换效率Fv/Fm值为0.79±0.02,叶绿素荧光参数维持在较高水平;快速光响应曲线结果表明,随着光强的增加,PSⅡ的实际光量子产量ΦPSⅡ、光化学淬灭系数qP呈下降趋势,而相对电子传递速率ETR、非光化学淬灭系数qN呈上升趋势。地石榴对外界多变环境有很强的适应能力,具有显著的阳生植物特征。
To explore the effect of different light intensity on photosynthetic fluorescence parameters of pomegranate leaves,the garden plant pomegranate was used as the experimental material to determine the photosynthesis-light response process,chlorophyll fluorescence parameters and leaf rapidlight response curve(RLCS)at its stable growth period.The results showed that with the increase of light intensity,the net photosynthetic rate(Pn)first increased and then gradually stabilized,while stomatal conductance(Gs)and transpiration rate(Tr)increased and intercellular CO 2 concentration(Ci)decreased.The Pn was positively correlated with Gs and Tr(p<0.01),and negatively correlated with Ci(p<0.01).In pomegranate leaf,the value of original light energy conversion efficiency in PSⅡsystem(Fv/Fm)was 0.79±0.02 and chlorophyll fluorescence parameters remained at a higher level.Fast light response curve results showed that with the increase of light intensity,the actual light quantum yieldΦPSⅡin PSⅡsystem,photochemical quenching coefficient(qP)declined,while the relative electron transfer rate(ETR)and Non-photochemical quenching coefficient(qN)increased.In a word,the pomegranate has a strong ability to adapt to the changeable environment of the outside world.
作者
闭鸿雁
徐清
王兵
林素汀
杨远帆
龙左卿
苏文华
张光飞
BI Hongyan;XU Qing;WANG Bing;LIN Suting;YANG Yuanfan;LONG Zuoqin;SU Wenhua;ZHANG Guangfei(Institute of Ecology and Geobotany,Yunnan University,Kunming 650500,China)
出处
《种子》
北大核心
2019年第11期46-50,共5页
Seed
基金
国家水体污染控制与治理科技重大专项(2012 ZX 07102-003-04-04)
云南大学大创项目(2014033)
关键词
地石榴
光合作用
光响应
荧光
Ficus tikoua
photosynthesis
photoresponse
fluorescence
