Quantitative modeling of photoassimilate flow in an intact plant using the Positron Emitting Tracer Imaging System (PETIS)
Quantitative modeling of photoassimilate flow in an intact plant using the Positron Emitting Tracer Imaging System (PETIS)
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DOI：
10.1111/j.1747-0765.2005.tb00047.x
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发表时间：
2005-06-01
影响因子：
2
通讯作者：
Kume, T
中科院分区：
文献类型：
--
作者：
Matsuhashi, S;Fujimaki, S;Kume, T
利用正电子发射示踪成像系统（PETIS）对完整植物茎中的同化物流动进行了实时成像，并定量描述了其动态。将放射性（CO_2）-C-11注入完整蚕豆（Vicia faba L.）与含有环境浓度的非放射性载体CO2气体的空气一起。用PETIS拍摄了C-11标记的光合同化物在植物体内流动的图像。在这里，我们证明，平均流速和分配比例的同化物在各个节点和节间的观测茎可以估计的传递函数分析，数学建模方法之一。我们还估计了在同一茎的平均流速的空间分布的变化时，美联储叶暴露于富集载体CO2气体。
The photoassimilate flow in an intact plant stem was imaged in real-time and its dynamics was quantitatively described using the Positron Emitting Tracer Imaging System (PETIS). Radioactive (CO2)-C-11 was fed to a leaf of an intact broad bean (Vicia faba L.) plant, together with air containing an ambient concentration of non-radioactive carrier CO2 gas. Movies of flow of the C-11-labeled photoassimilates in the plant body were captured with PETIS. Here we demonstrate that the average flow speeds and the distribution ratios of photoassimilates in the respective nodes and internodes of the observed stem can be estimated by the transfer function analysis, one of the mathematical modeling, methods. We also estimated the changes in the spatial distribution of the average flow speeds in the same stem when the fed leaf was exposed to enriched carrier CO2 gas.