A Unit Pipe Pneumatic model to simulate gas kinetics during measurements of embolism in excised angiosperm xylem
A Unit Pipe Pneumatic model to simulate gas kinetics during measurements of embolism in excised angiosperm xylem
复制标题
单位管气动模型，用于模拟被子植物切下木质部栓塞测量过程中的气体动力学
DOI：
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
M. Tyree
中科院分区：
文献类型：
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作者：
Dong;L. Pereira;Guoquan Peng;R. V. Ribeiro;L. Kaack;S. Jansen;M. Tyree
本文介绍了一种用于测定植物木质部抗栓塞性的气动方法。尽管惊人的相似性之间的脆弱性曲线的气动和液压的方法，建模方法是非常需要的，以证明木质部栓塞阻力可以准确地量化的基础上，气体扩散动力学。开发了一个单元管道气动（UPPn）模型来估计气体从完整的管道，这是轴向相互连接的管道间的坑膜扩散。所用的物理定律包括菲克扩散定律、平衡时液相和气相之间气体浓度分配的亨利定律和理想气体定律。UPPn模型表明，91%的提取气体来自前两个系列的栓塞，完整的管道，只有9%的水相模拟15秒后。用气动装置测量的抗栓塞性被系统性高估了2 - 17%，对应于P50的典型测量误差为0.11 MPa（水势相当于最大提取气体量的50%）。由于UPPn模型的计算结果得到了实验的支持，因此将气动法应用于被子植物抗栓塞性的研究具有良好的理论和实验基础。
The Pneumatic method has been introduced to quantify embolism resistance in plant xylem of various organs. Despite striking similarity in vulnerability curves between the Pneumatic and hydraulic methods, a modeling approach is highly needed to demonstrate that xylem embolism resistance can be accurately quantified based on gas diffusion kinetics. A Unit Pipe Pneumatic (UPPn) model was developed to estimate gas diffusion from intact conduits, which were axially interconnected by interconduit pit membranes. The physical laws used included Fick’s law for diffusion, Henry’s law for gas concentration partitioning between liquid and gas phases at equilibrium, and the ideal gas law. The UPPn model showed that 91% of the extracted gas came from the first two series of embolized, intact conduits, and only 9% from the aqueous phase after 15 s of simulation. Embolism resistance measured with a Pneumatic apparatus was systematically overestimated by 2 to 17%, corresponding to a typical measuring error of 0.11 MPa for P50 (the water potential equivalent to 50% of the maximum amount of gas extracted). Because results from the UPPn model are supported by experimental evidence, there is a good theoretical and experimental basis for applying the pneumatic method to research on embolism resistance of angiosperms.
DOI：
10.1111/nph.13737
发表时间：
2016-03
期刊：
The New phytologist
影响因子：
--
作者：
Morris H;Plavcová L;Cvecko P;Fichtler E;Gillingham MA;Martínez-Cabrera HI;McGlinn DJ;Wheeler E;Zheng J;Ziemińska K;Jansen S
通讯作者：
Jansen S
影响因子：
7.3
作者：
Zhang, Ya;Carmesin, Cora;Jansen, Steven
通讯作者：
Jansen, Steven