Spatiotemporal dynamics of a reaction-diffusion model of pollen tube tip growth
Spatiotemporal dynamics of a reaction-diffusion model of pollen tube tip growth
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DOI：
10.1007/s00285-019-01396-7
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发表时间：
2019-09-01
影响因子：
1.9
通讯作者：
Shi, Junping
中科院分区：
文献类型：
--
作者：
Tian, Chenwei;Shi, Qingyan;Shi, Junping
提出了一个反应扩散模型来描述ROP 1和钙离子在花粉管顶端空间分布的机制。该模型假设质膜ROP 1通过正反馈回路激活自身，而胞浆钙离子通过负反馈回路抑制ROP 1。此外，它提出的横向运动的分子在质膜上的描述扩散。结果表明，在非空间模型中，花粉萌发过程也可能存在振荡或振荡动力学过程，在全空间模型中，花粉萌发过程的时空格局呈现出平稳和振荡的特征，与实验结果相似。
A reaction-diffusion model is proposed to describe the mechanisms underlying the spatial distributions of ROP1 and calcium on the pollen tube tip. The model assumes that the plasma membrane ROP1 activates itself through positive feedback loop, while the cytosolic calcium ions inhibit ROP1 via a negative feedback loop. Furthermore it is proposed that lateral movement of molecules on the plasma membrane are depicted by diffusion. It is shown that bistable or oscillatory dynamics could exist even in the non-spatial model, and stationary and oscillatory spatiotemporal patterns are found in the full spatial model which resemble the experimental data of pollen tube tip growth.