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| DOI：10.13522/j.cnki.ggps.2021197 |
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| Online-monitoring of Plant Water Statues Using the Leaf Patch Clamp Pressure Probe: A review |
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ZHENG Lijian, MA Juanjuan, SUN Xihuan, et al
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College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
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| Abstract: |
| 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 |
| Key words: leaf patch clamp pressure probe technology; irrigation; water relations; stomatal response; water potential |
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