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    丁友芳, 张晓霞, 史玲玲, 张蕴薇, 杨富裕, 刘玉军. 葛根净光合速率日变化及其与环境因子的关系[J]. 北京林业大学学报, 2010, 32(5): 132-137.
    引用本文: 丁友芳, 张晓霞, 史玲玲, 张蕴薇, 杨富裕, 刘玉军. 葛根净光合速率日变化及其与环境因子的关系[J]. 北京林业大学学报, 2010, 32(5): 132-137.
    DING You-fang, ZHANG Xiao-xia, SHI Ling-ling, ZHANG Yun-wei, YANG Fu-yu, LIU Yu-jun. Diurnal change of net photosynthetic rates in Pueraria lobata and its relation with environmental factors[J]. Journal of Beijing Forestry University, 2010, 32(5): 132-137.
    Citation: DING You-fang, ZHANG Xiao-xia, SHI Ling-ling, ZHANG Yun-wei, YANG Fu-yu, LIU Yu-jun. Diurnal change of net photosynthetic rates in Pueraria lobata and its relation with environmental factors[J]. Journal of Beijing Forestry University, 2010, 32(5): 132-137.

    葛根净光合速率日变化及其与环境因子的关系

    Diurnal change of net photosynthetic rates in Pueraria lobata and its relation with environmental factors

    • 摘要: 采用PP--systems的CIRAS--Ⅰ型便携式光合测定系统,研究了葛根两个栽培品种叶片的净光合速率日变化及其与环境因子日变化间的关系。结果表明:葛根叶片净光合速率日变化呈双峰型曲线,具有明显的光合“午休”现象;葛根叶片净光合速率与气孔导度呈极显著正相关(P<0.01),与胞间CO2浓度、蒸腾速率呈显著正相关(P<0.05),与气温、叶温呈显著负相关(P<0.05)。本研究表明:影响葛根光合特性的因素既有气孔限制方面的,也有非气孔限制方面的。

       

      Abstract: Diurnal changes of leaf net photosynthetic rates of two cultivars of Pueraria lobata were measured using the CIRAS-Ⅰ portable photosynthesis system (PP-Systems Co., British), and the relationship among diurnal changes of net photosynthetic rates and those of environmental factors were analyzed. The results showed that diurnal changes in the net photosynthetic rates of both two cultivars could be interpreted as double-peak curves, i.e. they possessed obvious so-called “midday depression” phenomenon. Further analyses showed that the correlation between net photosynthetic rate and stomatal conductance was positive and extremely significant (P<0.01), the correlations between net photosynthetic rate and intercellular CO2 concentration as well as the transpiration rate were positive and significant (P<0.05), and the correlations between net photosynthetic rate and air temperature as well as leaf temperature were negative and significant (P<0.05). The results indicate that among the factors affecting photosynthetic characteristics, some of them could be grouped as stomatal restrictions, while the others could be grouped as non-stomatal restrictions.

       

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