Measurement of xylem water pressure using High-Capacity Tensiometer and benchmarking against Pressure Chamber and Thermocouple Psychrometer
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چکیده
منابع مشابه
Comparison of pressure chamber and thermocouple psychrometer determinations of leaf water status in tomato.
Although the pressure chamber has gained wide acceptance as a convenient method for the measurement of plant water status, the relationship between the pressure observed in the chamber and other parameters of plant water status remains unclear. If one assumes that the spatial arrangement of water in the shoot is the same under pressure as it was in the intact plant, the positive pressure (P) an...
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Leaf water potentials measured with a pressure chamber.
Leaf water potentials were estimated from the sum of the balancing pressure measured with a pressure chamber and the osmotic potential of the xylem sap in leafy shoots or leaves. When leaf water potentials in yew, rhododendron, and sunflower were compared with those measured with a thermocouple psychrometer known to indicate accurate values of leaf water potential, determinations were within +/...
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Extensive testing, at pressure "'evels from 3U to 758 MPa (5,000 to 110,000 PSI) was done at Aberdeen Proving Ground to evaluate 15 different types of electrical pressure transducers used in large caliber weapons. When using a given tvoe of transducer, the ability to consistently distinguish dynamic pressure variations as small as 0.2% was demonstrated. Yet different models of pressure transduc...
متن کاملNew evidence for large negative xylem pressures and their measurement by the pressure chamber method
Pressure probe measurements have been interpreted as showing that xylem pressures below c. -0-4MPa do not exist and that pressure chamber measurements of lower negative pressures are invalid. We present new evidence supporting the pressure chamber technique and the existence of xylem pressures well below -0-4 MPa. We deduced xylem pressures in water-stressed stem xylem from the following experi...
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ژورنال
عنوان ژورنال: E3S Web of Conferences
سال: 2020
ISSN: 2267-1242
DOI: 10.1051/e3sconf/202019503014