biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 26:11-15, 1984 | DOI: 10.1007/BF02880417

Transpiration of spring barley under nitrogen and phosphorus deficiency during leaf wilting

R. Hák1, L. Nátr1
1 Department of Plant Physiology and Soil Biology, Faculty of Science, Charles University, Praha 2, Czechoslovakia

In an open gas exchange system with a thermocouple psychrometer the transpiration rate of the first leaf in 8-day plants of spring barley was measured in dependence on the water saturation deficit (ΔW sat). The plants were cultivated in Richter's nutrient solution, either complete, or deficient in nitrogen or phosphorus. The cuticular transpiration (as measured in the dark) was unaffected by N and P deficiency. The N deficiency reduced the transpiration rate by increasing stomatal resistance since full water saturation of the leaf (67% rate of the control variant) up to stomatal closing at Δ Wsat = 14%. The P deficiency does not affect the transpiration rate at initial phases of wilting, but the stomata close only at a higher Δ Wsat (25%) than those in the control.

Received: December 30, 1982; Accepted: April 29, 1983; Published: January 1, 1984  Show citation

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Hák, R., & Nátr, L. (1984). Transpiration of spring barley under nitrogen and phosphorus deficiency during leaf wilting. Biologia plantarum, 26(1), 11-15. doi: 10.1007/BF02880417
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