紫玉兰(Magnolia liliiflora)叶绿素荧光特性研究  

Chlorophyll Fluorescence Characteristic of Magnolia liliiflora

作　　者：张卢水[1,2] 吴庆贵[2] 胡进耀[2] 苏智先[2] 

机构地区：[1]西华师范大学生命科学学院,四川南充637002 [2]四川省生态学与环境保护技术重点实验室,四川绵阳621000

出　　处：《绵阳师范学院学报》2010年第11期60-65,共6页Journal of Mianyang Teachers＇ College

基　　金：四川省教育厅项目(2006A113);绵阳师范学院校级课题(MA2009014)

摘　　要：运用Li-6400光和仪对紫玉兰的叶绿素荧光动力学曲线、淬灭分析、荧光光曲线以及荧光ACI曲线等生理特性进行测定和对比分析,结果表明:随光照时间的加长,紫玉兰的荧光参数电子传递速率(ETR)、光化学猝灭系数(qP)和非光化学猝灭系数(NPQ)逐渐上升并在30 min左右达到稳定。最大荧光产量Fm′在叶片转入黑暗后逐渐上升,NPQ则开始下降,两者约在52 min趋于稳定。光照下PS II实际的光化学量子效率(PhiPS2)和CO2同化速率相对应的量子产量(PhiCO2)呈线性正相关(p<0.01),并随着光照强度的增加而减小。紫玉兰对CO2浓度变化比较敏感,在50-300μmol.mol-1浓度范围内,增加CO2浓度能显著提高紫玉兰的PhiPS2和PhiCO2值。The kinetic curve,quenching analysis,light curve and ACI curve of chlorophyll fluorescence of Magnolia liliiflora have been measured with Li-6400 portable photosynthesis system and comparatively analyzed.The results show that as sunlight prolongs,the ETR,qP and NPQ of chlorophyll fluorescence of M.liliiflora gradually increase and keep stable for about 30 minutes.When the blade turns into dark its Fm′ gradually raises,but the NPQ begins to decline.Both of them get to a stable level for about 52 minutes.Its PhiPS2 and PhiCO2 appear linearly and positively correlated and dropped with the light intensity added.The PhiPS2 and PhiCO2 have appositive relation to carbon dioxide concentration to a certain extent.M.liliiflora has a sensitivity to the CO2 concentration change,with the elevation of CO2 concentration in 50 to 300 μmol·mol-1.The increase of CO2 concentration could increase its PhiPS2 and PhiCO2 significantly.

关 键 词：紫玉兰 叶绿素荧光 光系统Ⅱ 光抑制 

分 类 号：Q945.11[生物学—植物学]