What do you mean by diffusion pressure deficit??
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The term diffusion pressure deficit(DPD) was coined by B.S Meyer in 1938. Originally DPD was described as suction pressure by Renner (1915). It is reduction in the diffusion pressureof water in solution or cell over its pure state due to presence of solutes in it and forces opposing diffusion.
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Diffusion Pressure Deficit
in a plant cell, the pressure (S) equal to the difference between the osmotic pressure (P) and the turgor pressure (T). When the osmotic and turgor pressures are equal, the plant does not absorb water. In cells of terrestrial plants, the osmotic pressure usually somewhat exceeds the turgor pressure (P > T); the greater the difference between the pressures, the more intensively the cells absorb water. The diffusion pressure deficit depends on the type of plant cell, the height of the cell’s location in the plant, the substrate, atmospheric humidity, and wind velocity. It fluctuates between 0.1 and 100 atmospheres; when it exceeds 10 atmospheres, irrigation of crops is necessary.
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in a plant cell, the pressure (S) equal to the difference between the osmotic pressure (P) and the turgor pressure (T). When the osmotic and turgor pressures are equal, the plant does not absorb water. In cells of terrestrial plants, the osmotic pressure usually somewhat exceeds the turgor pressure (P > T); the greater the difference between the pressures, the more intensively the cells absorb water. The diffusion pressure deficit depends on the type of plant cell, the height of the cell’s location in the plant, the substrate, atmospheric humidity, and wind velocity. It fluctuates between 0.1 and 100 atmospheres; when it exceeds 10 atmospheres, irrigation of crops is necessary.
likely to take responsibility for action or inaction when others are present.
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