Assessing key parameters in simultaneous simulation of rapid kinetics of chlorophyll a fluorescence and trans‐thylakoid electric potential difference

IF 5.4 2区 生物学 Q1 PLANT SCIENCES Physiologia plantarum Pub Date : 2024-09-17 DOI:10.1111/ppl.14517
Hui Lyu, Dušan Lazár
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Abstract

Our study attempts to address the following questions: among numerous photosynthetic modules, which parameters notably influence the rapid chlorophyll fluorescence (ChlF) rise, the so‐called O‐J‐I‐P transient, in conjunction with the P515 signal, as these two records are easily obtained and widely used in photosynthesis research, and how are these parameters ranked in terms of their importance? These questions might be difficult to answer solely through experimental assays. Therefore, we employed an established photosynthesis model. Firstly, we utilized the model to simulate the measured rapid ChlF rise and P515 kinetics simultaneously. Secondly, we employed the sensitivity analysis (SA) tool by randomly altering model parameters to observe their effects on model output variables. Thirdly, we systematically identified significant parameters for both or one of the kinetics across various scenarios.A novel aspect of our study is the application of the Morris method, a global SA tool, to simultaneously assess the significance of model parameters in shaping both or one of the kinetics. The Morris SA technique enables the quantification of how much a specific parameter affects O‐J‐I‐P transient during particular time intervals (e.g., J, I, and P steps). This allowed us to theoretically analyze which step is more significantly influenced by the parameter.In summary, our study contributes to the field by providing a comprehensive analysis of photosynthesis kinetics and emphasizing the importance of parameter selection in modelling this process. These findings can inform future research efforts aimed at improving photosynthesis models and advancing our understanding of photosynthetic processes.
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评估同时模拟叶绿素 a 荧光和跨类囊体电位差快速动力学的关键参数
我们的研究试图解决以下问题:在众多光合作用模块中,哪些参数会显著影响叶绿素荧光(ChlF)的快速上升,即所谓的 O-J-I-P 瞬态,以及 P515 信号,因为这两种记录很容易获得,并广泛应用于光合作用研究;这些参数的重要性如何排序?这些问题仅靠实验测定可能难以回答。因此,我们采用了一个成熟的光合作用模型。首先,我们利用该模型同时模拟了测量到的 ChlF 快速上升和 P515 动力学。其次,我们使用了敏感性分析(SA)工具,随机改变模型参数,观察它们对模型输出变量的影响。我们这项研究的一个新颖之处在于应用了莫里斯方法(一种全局性的敏感性分析工具)来同时评估模型参数在塑造两种或一种动力学过程中的重要性。Morris SA 技术可以量化特定参数在特定时间间隔(如 J、I 和 P 步骤)内对 O-J-I-P 瞬态的影响程度。总之,我们的研究对光合作用动力学进行了全面分析,并强调了参数选择在模拟这一过程中的重要性,从而为该领域做出了贡献。这些发现可以为今后的研究工作提供参考,从而改进光合作用模型,加深我们对光合作用过程的理解。
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来源期刊
Physiologia plantarum
Physiologia plantarum 生物-植物科学
CiteScore
11.00
自引率
3.10%
发文量
224
审稿时长
3.9 months
期刊介绍: Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.
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