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The plant water potential pressure chamber is an instrument used to determine the plant water potential (Ψ) and its components and to extract xylem conduit sap for component analysis. It can be used to study the water relationship of plants and the relationship between plants and the environment.
Plant water potential pressure chambers are suitable for research on plant physiology, ecology, agronomy, forestry, and pasture. It is therefore one of the important instruments for teaching and scientific research to guide the rational use of water and drought breeding of crops and forests and grasses. It is easy and fast to use for indoor and outdoor field operations. Plants in the soil-plant-atmosphere continuous system, the roots continuously absorb water from the soil, and the leaves continue to lose moisture to the surrounding environment. In this water potential gradient system, the plant roots-stems-leaves also have a gradient of water potential, so that the xylem The tiny water column in the conduit is affected by the negative pressure of the low water potential of the air, forming a pulling force for the upward transport of water.
When the plant shoots or leaves are cut, the tensioned water column in the conduit breaks and the water column shrinks from the incision to the interior of the upper end. The cut material is loaded into the plant's water potential pressure chamber, and one end of the cut out is sealed outside and pressurized to rebalance the tension in the shoot or blade to push the small water column back to the cut surface. All the pressure is the plant. The water potential value.
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