Sweet Pepper (Capsicum annuum L.) Canopy Photosynthesis Modeling Using 3D Plant Architecture and Light Ray-Tracing.
Sweet Pepper (Capsicum annuum L.) Canopy Photosynthesis Modeling Using 3D Plant Architecture and Light Ray-Tracing.
复制标题
甜辣椒（辣椒辣椒L.）冠层光合作用建模，使用3D植物建筑和光线追踪。
DOI：
10.3389/fpls.2016.01321
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发表时间：
2016
影响因子：
5.6
通讯作者：
Son JE
中科院分区：
文献类型：
--
作者：
Kim JH;Lee JW;Ahn TI;Shin JH;Park KS;Son JE
冠层光合作用的估算通常使用数学模型，这些模型具有以下假设：冠层内的光截获能力随冠层深度呈指数下降，光合作用能力因驯化而受光截获的影响。然而，在实际情况下，冠层对光的截获是非常不均匀的，这取决于环境因素，如位置、小气候、叶面积指数和冠层结构。在分析中应用这些因素是很重要的。本研究旨在估算辣椒(Capsicum annuum L.)的冠层光合作用。通过利用三维光线追踪和各层的光合作用能力来模拟冠层的截获辐射，并进行了分析。通过输入实际植物的结构数据，使用图形软件(Houdini FX，FX，加拿大)重建了辣椒的3D结构。测量了各层的光曲线和A/Ci曲线，对Farquhar、von Caemmerer和Berry(FvCB)模型进行了参数描述。观察到了冠层内光合作用能力的差异。利用截获的辐射数据和各层的光合作用参数，对计算出的各层的光合作用速率进行积分，估算出整个植株的光合作用速率。整个植物的估计光合作用速率与使用封闭小室进行验证的测量植物显示出很好的一致性。结果表明，该方法是利用光截获进行冠层光合作用预测的可靠工具，可推广到实际温室条件下的冠层光合作用分析。
Canopy photosynthesis has typically been estimated using mathematical models that have the following assumptions: the light interception inside the canopy exponentially declines with the canopy depth, and the photosynthetic capacity is affected by light interception as a result of acclimation. However, in actual situations, light interception in the canopy is quite heterogenous depending on environmental factors such as the location, microclimate, leaf area index, and canopy architecture. It is important to apply these factors in an analysis. The objective of the current study is to estimate the canopy photosynthesis of paprika (Capsicum annuum L.) with an analysis of by simulating the intercepted irradiation of the canopy using a 3D ray-tracing and photosynthetic capacity in each layer. By inputting the structural data of an actual plant, the 3D architecture of paprika was reconstructed using graphic software (Houdini FX, FX, Canada). The light curves and A/Ci curve of each layer were measured to parameterize the Farquhar, von Caemmerer, and Berry (FvCB) model. The difference in photosynthetic capacity within the canopy was observed. With the intercepted irradiation data and photosynthetic parameters of each layer, the values of an entire plant's photosynthesis rate were estimated by integrating the calculated photosynthesis rate at each layer. The estimated photosynthesis rate of an entire plant showed good agreement with the measured plant using a closed chamber for validation. From the results, this method was considered as a reliable tool to predict canopy photosynthesis using light interception, and can be extended to analyze the canopy photosynthesis in actual greenhouse conditions.
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影响因子：
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