摘要
【目的】针对广西道地药材战骨(Premna fulva Craib)丰产、高产栽培技术研究缺乏的现状,对战骨光合特点进行测定与分析,旨在了解战骨的光合作用特征,为其人工种植提供科学依据。【方法】采用Li-6400便携式光合测定系统对战骨的光合作用-光响应曲线和光合日变化各指标进行测定。【结果】战骨叶片的最大净光合速率17.07μmol·m-2·s-1,表观量子效率0.047μmol·ml-2·s-1,暗呼吸速率0.620μmol·m-2·s-1,光饱和点1364μmol·m-2·s-1,光补偿点13.14μmol·m-2·s-1。战骨的净光合速率(Pn)日进程呈"双峰型"曲线,偏相关分析表明,Pn与光合有效辐射、气孔导度、蒸腾速率和叶温呈极显著正相关,光合"午休"的主要原因是强光引起的非气孔因素。【结论】战骨具阳生植物的光合特性,适宜种植在阳光充足的生境。
【Objective】To investigate the photosynthetic characteristics of Premna fulva Craib,and provide a theoretical basis for the high yield cultivation management.【Methods】The net photosynthetic rate to light intensity response curves and diurnal variation of photosynthesis in the leaves of P.fulva were measured by Li-6400 portable photosynthesis measuring system.【Results】The maximal net photosynthesis rate of P.fulva was 17.07μmol·m-2·s-1.The apparent quantum yield was 0.0471μmol·m-2·s-1.The dark respiration rate was 0.620μmol·m-2·s-1.The light saturation point was 1364μmol·m-2·s-1.The light compensation point of photosynthesis was 13.14μmol·m-2·s-1.Diurnal variation in net photosynthetic rate(Pn)of P.fulva was two-peak pattern,and the main cause for the decline of photosynthetic rate was the non stomatal limitation.Partial correlation analysis showed that,the Pnof P.fulva were significantly related to photosynthetically active radiation,stomatal conductance,transpiration rate and leaf temperature.【Conclusion】P.fulva was a shrub shared similar photosynthetic characteristics with sun plants,which is suitable to plant in sunny habitats.
出处
《广西科学院学报》
2016年第1期21-25,共5页
Journal of Guangxi Academy of Sciences
基金
广西科学研究与技术开发计划项目(桂科重1298001-2-5)
广西植物研究所基本业务费项目(桂植业12011)
桂林市科技攻关项目(20130414)资助
关键词
战骨
光响应曲线
光合日变化
偏相关分析
Premna fulva Craib
light response curve
diurnal variation of photosynthesis
partial correlation analysis
