异质生境中山东银莲花光响应曲线模型的优选及光合生理特性分析
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摘要
为推断不同生境中山东银莲花不同光强下光合参数的变化规律,在相同的CO_2浓度、水分、气压等条件下,设定有效光辐射强度梯度,用光合测定仪测定光合参数,并对多种光响应模型拟合光曲线进行分析。结果表明:山顶灌丛的山东银莲花根据光合参数实测值与预测值的标准误、残差平方和、判定系数大小确定了各模型的拟合效果为直角双曲线修正模型>非直角双曲线模型>指数函数模型>直角双曲线模型;针阔混交林下山东银莲花4个模型拟合效果区别不大,其中直角双曲线修正模型最佳。山顶灌丛山东银莲花光强大于1 200μmol·m~(-2)·s~(-1)时,出现了光抑制,表现为气孔导度变小、蒸腾速率下降,光合速率降低,混交林下生境的则表现为一直上升的稳定趋势,充分体现该种在不同环境下都具有良好的适应性。
In order to deduce the variation of photosynthetic parameters of Anemone shikokiana under different light intensities,in this study,the effective light intensity gradient was set under the same carbon dioxide concentration,humidity and air pressure.The light and parameters were measured by photosynthetic,and the fitting light curves of various light response models were analyzed.The results showed that the modified rectangular hyperbola model was the best one among four fitting models of light-response curve to A.shilokianain mountaintop according to standard error,residual sum of squares and decision coefficient between measured values and predicted values.There was no significant differences among 4 fitting models to A.shikokianaunder mixed forest.When photosynthetically active radiation was above 1 200μmol·m~(-2)·s~(-1),photoinhibition was taken place in A.shikokiana of mountaintop,and net photosynthetic rate,stomatal conductance and transpiration rate declined.However,they always were on the rise under mixed forest.Therefore,A.shikokiana has the well adaptability to different environments.
In order to deduce the variation of photosynthetic parameters of Anemone shikokiana under different light intensities,in this study,the effective light intensity gradient was set under the same carbon dioxide concentration,humidity and air pressure.The light and parameters were measured by photosynthetic,and the fitting light curves of various light response models were analyzed.The results showed that the modified rectangular hyperbola model was the best one among four fitting models of light-response curve to A.shilokianain mountaintop according to standard error,residual sum of squares and decision coefficient between measured values and predicted values.There was no significant differences among 4 fitting models to A.shikokianaunder mixed forest.When photosynthetically active radiation was above 1 200μmol·m~(-2)·s~(-1),photoinhibition was taken place in A.shikokiana of mountaintop,and net photosynthetic rate,stomatal conductance and transpiration rate declined.However,they always were on the rise under mixed forest.Therefore,A.shikokiana has the well adaptability to different environments.
引文
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[3]李义博,宋贺,周莉,等.C4植物玉米的光合-光响应曲线模拟研究[J],植物生态学报,2017,41(12):1289-1300.
[4]叶子飘,于强.光合作用光响应模型的比较[J].植物生态学报,2008(32):1356-1361.
[5]叶子飘,张海利,黄宗安,等.叶片光能利用效率和水分利用效率对光响应的模型构建[J].植物生理学报,2017(6):1116-1122.
[6]叶子飘,杨小龙,冯关萍.植物电子传递速率对光响应模型的比较研究[J].扬州大学学报(农业与生命科学版),2018,39(1):97-104.
[7]王秀伟,毛子军.7个光响应曲线模型对不同植物种的实用性[J].植物研究,2009,29(1):43-48.
[8]王鸷,逄玉娟,刘传林,等.稀有植物山东银莲花(Anemone shikokiana(Makino)Makino)的分布格局及影响因子分析[J],植物研究,2014,34(4):440-445.
[9]Bian F H,Pang Y J,Wang Z,et al.Genetic diversity of A-nemone shikokiana(Makino)Makino analyzed using the proteomics-based approach[J],Current Proteomics,2015,12(1):4-13.
[10]Bian F H,Pang Y J,Wang Z,et al.Genetic diversity of the rare plant Anemone shikokiana(Makino)Makino(Ranunculaceae)inferred from AFLP marker[J],Plant Systematics and Evolution,2015,301:677-684.
[11]叶子飘,于强.一个光合作用光响应新模型与传统模型的比较[J].沈阳农业大学学报,2007,38(6):771-775.
[12]Martin-Michel Gauthier,Douglass F J.Reductions in net photosynthesis and stomatal conductance vary with time since leaf detachment in three deciduous angiosperms[J].Trees,2018,https://doi.org/10.1007/s00468-018-1706-z.
[13]Lahive F,Hadley P,Daymond A J.The impact of elevated CO2and water deficit stress on growth and photosynthesis of juvenile cacao(Theobroma cacao L.)[J].Photosynthetica,2018,56(3):911-920.
[14]徐伟洲,邓西平,王智,等.混播白羊草和达乌里胡枝子叶片光合生理特性对水分胁迫的响应[J].西北植物学报,2017,37(6):1155-1165.
[15]Farquhar G D,Sharkey T D.Stomatal conductance and photosynthesis[J].Annual Review of Plant Physiology,1982,33:317-345.
[16]Pardos M,Calama R.Responses of Pinus pinea seedlings to moderate drought and shade:is the provenance a differential factor?[J].Photosynthetica,2018,56(3):786-798.
[17]周多多,蒋少伟,吴桂林,等.不同水分条件下胡杨光响应曲线拟合模型比较[J].植物科学学报,2017,35(3):406-412.
[18]Evans J R,Jakobsen I,gren E.Photosynthetic light-response curves[J].Planta,1993,189(2):191-200.