Citation for Published Item: Use Policy a Compartmental Model Analysis of Integrative and Self- Regulatory Ion Dynamics in Pollen Tube Growth-猫眼课题宝

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J. Liu;B. M. A. G. Piette;M. Deeks;Franklin-Tong;V. E. Hussey;P. J. a;Junli Liu;B. M. A. G. Piette;M. Deeks;V. Franklin-Tong;P. Hussey;Richard James Morris;John Innes Centre

花粉管生长中整合和自我调节离子动力学的隔室模型分析，公共科学图书馆，5(10)。E13157。可使用和/或复制全文，并以任何格式或媒介提供给第三方，无需事先许可或收费，用于个人研究或学习、教育或非出于保护目的，前提是：·引用原始来源的完整书目·链接到DRO中的元数据记录·全文不得以任何方式更改，未经版权所有者的正式许可，不得以任何格式或媒介出售全文。有关更多详细信息，请参考完整的DRO政策。摘要高等植物的有性繁殖依赖于花粉管的极化生长。花粉管顶端的生长部位对信号过程作出反应，从而成功地将管引导到胚珠。花粉管生长的基本特征是离子通量的极化、细胞内的离子梯度和振荡动力学。然而，人们对这些特征是如何产生的以及它们之间是如何因果联系的知之甚少。我们认为生物系统中的离子动力学应该以一种综合的、自我调节的方式来研究。在这里，我们发展了一个两室模型，通过整合花粉管顶端和柄上的主要离子转运体。我们证明，花粉管中极化生长的生理特征可以用顶端和小腿上转运蛋白的局部分布来解释。模型分析表明，尖端和杆部之间是一个自调节的动力学系统，但尖端的振荡动力学在维持离子梯度方面并不起重要作用。此外，沿花粉管传播的电流有助于离子动力学的调节。提出了生长诱导振荡的两种可能机制：顶膜向小腿膜的转变和生长诱导离子转运体动力学参数的变化。本文提出的方法和原理适用于研究任何植物细胞系统中的离子动力学及其与其他功能模块的相互作用。版权所有：ü2010，Liu等人。这是一篇开放获取的文章，根据知识共享署名许可证的条款分发，该许可证允许在任何媒体上不受限制地使用、分发和复制，前提是原始作者和来源必须注明。资助者在研究设计、数据收集和分析、决定发表或准备手稿方面没有任何作用。

compartmental model analysis of integrative and self-regulatory ion dynamics in pollen tube growth.', PLoS ONE., 5 (10). e13157. The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full DRO policy for further details. Abstract Sexual reproduction in higher plants relies upon the polarised growth of pollen tubes. The growth-site at the pollen tube tip responds to signalling processes to successfully steer the tube to an ovule. Essential features of pollen tube growth are polarisation of ion fluxes, intracellular ion gradients, and oscillating dynamics. However, little is known about how these features are generated and how they are causally related. We propose that ion dynamics in biological systems should be studied in an integrative and self-regulatory way. Here we have developed a two-compartment model by integrating major ion transporters at both the tip and shank of pollen tubes. We demonstrate that the physiological features of polarised growth in the pollen tube can be explained by the localised distribution of transporters at the tip and shank. Model analysis reveals that the tip and shank compartments integrate into a self-regulatory dynamic system, however the oscillatory dynamics at the tip do not play an important role in maintaining ion gradients. Furthermore, an electric current travelling along the pollen tube contributes to the regulation of ion dynamics. Two candidate mechanisms for growth-induced oscillations are proposed: the transition of tip membrane into shank membrane, and growth-induced changes in kinetic parameters of ion transporters. The methodology and principles developed here are applicable to the study of ion dynamics and their interactions with other functional modules in any plant cellular system. Copyright: ß 2010 Liu et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Citation for Published Item: Use Policy a Compartmental Model Analysis of Integrative and Self- Regulatory Ion Dynamics in Pollen Tube Growth

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