环境因素对植物导水率影响的研究综述

Research progress in plant hydraulic conductance under different environmental factors

植物的导水率表示单位压力梯度植物传导水分的通量,是根系吸收及传导水分能力大小的一个重要生理生态指标。植物导水率受内在和外在因素的影响而发生明显变化。本文重点概述了包括根区土壤水分、养分、盐分、温度和灌溉方式等外在因素对植物导水率影响的研究进展。深入阐明不同环境因素下的植物导水率,不仅可充实SPAC系统水分传输理论,而且有助于明确植物对环境的适应机制和高效用水的潜力。

Plant hydraulic conductance（K） refers to the rate of water flow（kg·s-） per unit pressure drop（MPa）,which drives flow through the plant or plant organ systems.It is an important eco-physiology index for measuring root water absorption and transmission capacity.Both internal and external factors could significantly change plant hydraulic conductance.This article summarized main research progress on the effects of environmental factors on plant hydraulic conductance.Environmental factors such as root zone soil moisture,nutrient,salinity,temperature and irrigation modes were analyzed.The paper threw further light on plant hydraulic conductance under different environmental factors.This had an important function in strengthening SPAC water transport theories and defining plant adaptive mechanisms to environmental conditions and high water use potential.