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Pressure differential of more than 200 kPa prevented dye movement in Nicotiana clevelcmdii trichome cells.

Pressure differences in the alga Chara corallina cause PD to seal off.

Increasing turgor, by microinjection of oil droplets, in Arabidopsis root hairs has no effect on electrical coupling of cells.

Oparka & Prior, 1992

Ding & Tazawa, 1989; Reid & Overall, 1992

Lew, 1996

Osmotic

Increasing mannitol concentrations caused constricted neck regions of root tip PD to widen, with increased phloem unloading.

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