金森女贞光合生理特性的研究  

Photosynthetic Characteristics of Ligustrum japonicum'Howardii'

作　　者：李罡[1] 傅玉兰[1] 

机构地区：[1]安徽农业大学林学与园林学院,合肥230036

出　　处：《林业科技开发》2009年第1期61-64,共4页China Forestry Science and Technology

基　　金：国家"十一五"科技支撑项目"珍稀乡土树种培育技术"(编号:2006BAD03A16)

摘　　要：研究了金森女贞光合生理日变化及其光补偿点和饱和点。结果表明:金森女贞的单日净光合速率(Pn)呈双峰曲线,出现"午休"现象,造成Pn下降的主要原因是非气孔因素。蒸腾速率(Tr)和气孔导度(Gs)的变化趋势与Pn相似,胞间CO2浓度(Ci)与之相反。Pn与Ci和PAR的相关性达到极显著水平,Tr与PAR、RH和VPD均达到极显著水平。金森女贞的光补偿点(LCP)为16.67μmol/(m2.s),饱和点(LSP)约为1000μmol/(m2.s),属于阳性植物。The photosynthetic parameters of Ligustrum japonicum ‘ Howardii＇ leaves including net photosynthetic rate （Pn）, Transpiration rate（ Tr ） , stomatal conductance （ Gs） , intercellular CO2 concentration （ Ci ） , photosynthetic active radiation （PAR） , relative humidity（RH） , vapor pressure deficit at the leaf surface （VPD） , light compensation point （LCP） and light saturation point（LSP） were measured in this study. The results showed that Pn had a diurnal change with two peaks, and the depression of Pn was mainly induced by non-stomatal factors. The diurnal change of Gs was similar to P, while Ci was the opposite. P was significantly positive related to Ci and PAR, Tr was significantly positive related to PAR, RH and VPD. LCP and LSP of Ligustrum japonicum‘ Howardii＇ leaves were 16.67 mol/（ m^2·s） and 1 000 mol/（ m^2·s ） , respectively, which indicated that it was a kind of heliophile.

关 键 词：金森女贞 光合作用 光合参数 

分 类 号：S512.1[农业科学—作物学] Q949.776.2[生物学—植物学]