鹅绒委陵菜光合生理特性与环境因子的相关性研究

本文以生长于青藏高原东北部的鹅绒委陵菜（Potentilla anserina L.）为试验材料,采用气相叶圆片氧电极,测定并研究了不同海拔地区该植物的光合色素含量、净光合速率（Pn）、表观量子效率（AQY）、光饱和点（LSP）、光补偿点（LCP）等光响应参数.结果表明,随着海拔升高,单位鲜重Chla、Chlb、Chlt和Car均有不同程度的降低,Chla/Chlb、A505/A652的值升高;最大净光合速率（Pmax）逐渐升高,暗呼吸速率（Rd）的变化刚好相反;净光合速率在低光强下,随海拔升高而降低,在高光强下,则随海拔升高而增加.统计分析表明,Chla、Chlb、Chla/Chlb及Chlt在不同海拔的三个地区相互间都有差异（P〈0.05）,AQY和Pmax差异不显著.

The Study of Correlation between Photosynthettc Phystology Characteristics and environmental factors of Potentilla anserina L.

The character of photosynthetic physiology of Potentilla anserina L growing the different altitude was studied by the gas oxygen electrode of the leaf discs and FMS-2 pulse PAM fluorometer,including the parameters of chlorophyll fluorescene,net photosynthetic rate,apparent quantum yield,photosynthetic pigment,light compensation point,Along with the increase of altitude,the content of carotenoid,chlorophyll,Chlb and Chla of per leaf fresh weight have varying degrees of decline,while Chla/b,A505/A652 was reverse.with increasing of the elevation,the net photosynthetic rate increased in the low light intensity,decreased in high light intensity;and maximum net photosynthetic rate increased gradually,in contrast to the dark respiration rate changes.Statistical analysis indicates that AQY,Φi,Pmax and Rd is no significant difference between the three regions.