• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Plants >A Theoretical Analysis of Relations between Pressure Changes along Xylem Vessels and Propagation of Variation Potential in Higher Plants
【2h】

A Theoretical Analysis of Relations between Pressure Changes along Xylem Vessels and Propagation of Variation Potential in Higher Plants

机译：沿木质血管压力变化与高等植物变异潜力的关系的理论分析

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Variation potential (VP) is an important long-distance electrical signal in higher plants that is induced by local damages, influences numerous physiological processes, and participates in plant adaptation to stressors. The transmission of increased hydraulic pressure through xylem vessels is the probable mechanism of VP propagation in plants; however, the rates of the pressure transmission and VP propagation can strongly vary. We analyzed this problem on the basis of a simple mathematical model of the pressure distribution along a xylem vessel, which was approximated by a tube with a pressure gradient. It is assumed that the VP is initiated if the integral over pressure is more than a threshold one, taking into account that the pressure is transiently increased in the initial point of the tube and is kept constant in the terminal point. It was shown that this simple model can well describe the parameters of VP propagation in higher plants, including the increase in time before VP initiation and the decrease in the rate of VP propagation with an increase in the distance from the zone of damage. Considering three types of the pressure dynamics, our model predicts that the velocity of VP propagation can be stimulated by an increase in the length of a plant shoot and also depends on pressure dynamics in the damaged zone. Our results theoretically support the hypothesis about the impact of pressure variations in xylem vessels on VP propagation.
机译：变异潜力（VP）是局部损伤引起的高等植物中的重要远程电信号，影响众多生理过程，并参与植物适应压力源。通过木瓜血管的增加的液压传递是植物中VP繁殖的可能机制;然而，压力传递和VP传播的速率会强烈变化。我们基于沿着木质血管的压力分布的简单数学模型来分析该问题，该血管近似由具有压力梯度的管近似。假设如果整体压力超过阈值1，则开始启动VP，考虑到在管的初始点中的压力瞬时增加并且在终端点保持恒定。结果表明，这种简单的模型可以很好地描述高等植物中VP传播的参数，包括在VP发起之前的时间增加，并且VP传播速度的降低，从损坏区域的距离增加。考虑到三种类型的压力动力学，我们的模型预测VP传播的速度可以通过植物射击长度的增加而刺激，并且还取决于受损区域中的压力动力学。我们的结果理论上支持关于Xylem血管对VP繁殖的压力变化的影响的假设。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号