Review of PSY1 Leaf Water Potential Meter in the Determination of Plant Leaf Water Potential

叶片对外界环境的响应十分敏感，叶水势可用来反映植物水分状态，量化植物受水分胁迫的程度。压力室法是目前应用最为广泛的叶片水势测定方法，但随着植物水力学研究深入，其耗时，不易携带，破坏性采样且无法长时间连续测量等缺点日益突显。为此，我们阐述了一种用于评估叶水势的新技术—PSY1型叶片水势计，相比于传统方法，该方法具有对植物损伤小，设备简单，易操作，可实现长时间自动测量等优势，这些特点使得PSY1型叶片水势计在植物水力学研究中有着广阔的应用前景。本文重点介绍PSY1型叶片水势计测定植物叶水势的操作规范，以确保数据的准确性和可靠性。Leaves are very sensitive to the response of the external environment. Leaf water potential can be used to reflect the water status of plants and quantify the degree of water stress in plants. The pressure chamber method is currently the most widely used method for measuring leaf water potential. However, with the deepening of plant hydraulics research, its shortcomings such as time-consuming, difficult to carry, destructive sampling, and inability to continuously measure for a long time have become increasingly prominent. To this end, we described a new technology for evaluating leaf water potential—PSY1 leaf water potential meter. Compared with traditional methods, this method has the advantages of less damage to plants, simple equipment, easy operation, and long-term automatic measurement. These characteristics make PSY1 leaf water potential meter have broad application prospects in plant hydraulics research. This paper focuses on the operation specification of PSY1 leaf water potential meter to determine the leaf water potential of plants, so as to ensure the accuracy and reliability of the data.