Stomatal aperture dynamics coupling mechanically passive and ionically active mechanisms.
Stomatal aperture dynamics coupling mechanically passive and ionically active mechanisms.
复制标题
气孔孔径动力学耦合机械被动和离子主动机制。
DOI：
10.1111/pce.14726
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Dan Hu
中科院分区：
文献类型：
--
作者：
Xue Cong;Sien Li;Dan Hu
气孔是连接光合作用和蒸腾作用的关键节点。植物通过调节气孔的开度，逐步达到水分损失和二氧化碳吸收的平衡。气孔的动态行为是植物适应性的重要基础。虽然关于气孔及其组成细胞、保卫细胞和辅助细胞的实验研究成果五花八门，但目前关于气孔调控的理论还很不明确和统一。在这项工作中，我们根据现有的实验结果开发了一个综合模型来描述种子植物的气孔动态。该模型包括三个部分：（1）气孔开度作为保卫细胞膨压和附属细胞膨压的二元函数的被动力学模型;（2）保卫细胞中目标离子含量作为其水势的函数的主动调节模型;（3）钾离子和水分运动的动力学模型。我们的模型已被用来半定量地再现丰富的实验现象。通过精确测量参数，我们的模型也可以用来预测气孔对环境条件变化的响应。
Stomata are the key nodes linking photosynthesis and transpiration. By regulating the opening degree of stomata, plants successively achieve the balance between water loss and carbon dioxide acquisition. The dynamic behaviour of stomata is an important cornerstone of plant adaptability. Though there have been miscellaneous experimental results on stomata and their constituent cells, the guard cells and the subsidiary cells, current theory of stomata regulation is far from clear and unified. In this work, we develop an integrated model to describe the stomatal dynamics of seed plants based on existing experimental results. The model includes three parts: (1) a passive mechanical model of the stomatal aperture as a bivariate function of the guard-cell turgor and the subsidiary-cell turgor; (2) an active regulation model with a target ion-content in guard cells as a function of their water potential; and (3) a dynamical model for the movement of potassium ions and water content. Our model has been used to reproduce abundant experimental phenomena semi-quantitatively. With accurately measured parameters, our model can also be used to predict stomatal responses to changes of environmental conditions.
DOI：
10.1073/pnas.1320421111
发表时间：
2014-04-29
影响因子：
11.1
作者：
Andres, Zaida;Perez-Hormaeche, Javier;Pardo, Jose M.
通讯作者：
Pardo, Jose M.