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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Models of fluorescence and photosynthesis for interpreting measurements of solar-induced chlorophyll fluorescence
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Models of fluorescence and photosynthesis for interpreting measurements of solar-induced chlorophyll fluorescence

机译：荧光和光合作用模型用于解释太阳诱导的叶绿素荧光的测量

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摘要

We have extended a conventional photosynthesis model to simulate field and laboratory measurements of chlorophyll fluorescence at the leaf scale. The fluorescence paramaterization is based on a close nonlinear relationship between the relative light saturation of photosynthesis and nonradiative energy dissipation in plants of different species. This relationship diverged only among examined data sets under stressed (strongly light saturated) conditions, possibly caused by differences in xanthophyll pigment concentrations. The relationship was quantified after analyzing data sets of pulse amplitude modulated measurements of chlorophyll fluorescence and gas exchange of leaves of different species exposed to different levels of light, CO_2, temperature, nitrogen fertilization treatments, and drought. We used this relationship in a photosynthesis model. The coupled model enabled us to quantify the relationships between steady state chlorophyll fluorescence yield, electron transport rate, and photosynthesis in leaves under different environmental conditions.
机译：我们扩展了常规的光合作用模型，以模拟田间和实验室尺度下叶绿素荧光的测量。荧光参量化基于光合作用的相对光饱和度与不同物种植物中非辐射能量耗散之间的紧密非线性关系。这种关系仅在压力（强烈光饱和）条件下的检查数据集之间存在分歧，这可能是由于叶黄素色素浓度的差异所致。在分析了暴露于不同水平的光，CO_2，温度，氮肥处理和干旱的不同物种的叶片叶绿素荧光和气体交换的脉冲幅度调制测量数据集之后，对这种关系进行了量化。我们在光合作用模型中使用了这种关系。耦合模型使我们能够量化在不同环境条件下叶片中稳态叶绿素荧光产量，电子传输速率和光合作用之间的关系。

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