叶片膨压探针诊断植物体水分状况原理及应用进展  

Online-monitoring of Plant Water Statues Using the Leaf Patch Clamp Pressure Probe:A review

作　　者：郑利剑 马娟娟[1] 孙西欢[1] 郭向红[1] ZHENG Lijian;MA Juanjuan;SUN Xihuan;GUO Xianghong(College of Water Resource Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学水利科学与工程学院,太原030024

出　　处：《灌溉排水学报》2022年第2期27-34,共8页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(52079085);山西省重点研发计划重点项目(201903D211011-4)。

摘　　要：叶片膨压探针(LPCP)技术是通过测定在恒定磁压力下叶片输出压力的衰减情况,能够实现原位连续无损监测植物叶片膨压变化,对植物水分状况的指示具有较高的准确性和敏感性。利用LPCP技术进行相关植物气孔生理、水分状况监测,并在此基础上指导灌溉,是近年来相关领域的研究热点。在梳理现有植物水分状况诊断方法的基础上,概括了LPCP技术的基本原理、安装策略和不同诊断指标的选择,并通过分析膨压变化参数与环境因子、植物水分生理参数间的关系来阐释该项技术对植物水分状况的诊断机理。提出目前LPCP技术仍处于诊断机理探索阶段,尚需在冠层尺度拓展、多环境因子预测和多源连续性指标评价等方面进行研究,并应将今后研究重点由探究植株生理反馈机制向制订合理灌溉策略转变。Precision irrigation relies on accurate perception of plant water statue.Plant-based sensors is a potential method to online monitor change in plant water statues due to its convenience,automaton and being able to measure water in both leaf stomata and other plant organs simultaneously.Among all available sensor,the non-invasive and in-situ leaf patch clamp pressure probe(LPCP) technology is a promising one as it allows continuous monitoring of plant leaf turgor pressure over at predefined interval.The principle of the LPCP is to measure the attenuated pressure of a leaf patch in response to a constant clamp pressure,and it has become a new versatile method to diagnose plant water status with high precision and sensitivity.LPCP has been applied in plant stomatal physiology to measure water status,and it can also help irrigation scheduling and has thus received increased interest over the recent years.We review in this paper its principle for plant water status diagnosis,installation and derivative parameters selection.Combined with leaf turgor measured by it for celery under drip irrigation,we analyzed the relationship between the change in turgor,environmental factors and plant water physiological parameters to explain the application of the device.We also outlined its pitfalls and the ways to improve it.We concluded that further studies on its application to canopy,predicting the impact of multi-environmental factors and evaluation of multi-source continuous indicators were needed.The research focus should be shifted from exploring the mechanism of plant physiological feedback to developing rational irrigation strategies.

关 键 词：叶片膨压探针技术 灌溉 水分关系 气孔响应 水势 

分 类 号：S512.11[农业科学—作物学]