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Investigations into biophysical regulation mechanisms of physiological water exchange of the Nitella translucens cells with the surroundings

100%

Kargol M., Suchanek G., Przestalski M., Kargol A.

Acta Physiologiae Plantarum

2006

tom 28

nr 1

In the present paper, we have presented a theoretical discussion of specific biophysical mechanisms per taining to the regulation (by means of internal factors) of physiological water ex change with the water medium by the cells of the Nitella translucens. The investigation has demonstrated that these cells have a capacity for water ex change regulation through changes in the values of transport parameters of the cell membrane (i.e. the filtration coefficient Lp and the reflection coefficient σ), as well as changes in the concentration Csi (in side the cells) of the osmotically active solute.

Biophysical mechanisms of physiological water exchange with the surroundings by the cells of the Nitella translucens and Chara corallina plants

84%

Kargol M., Kargol A.

Acta Physiologiae Plantarum

2005

tom 27

nr 1

In the present study, we discussed the biophysical mechanisms of stationary wa ter ex change with the surroundings by the Nitella translucens and Chara corallina plants. It was postulated that these plants, which subsist under total immersion in a water medium, conduct water exchange within single cells individually. With the application of the equations of mechanistic formalism for membrane transport to our investigations (Kargol and Kargol 2000, Kargol 2001, Kargol 2002, Kargol and Kargol 2003, 2003*), it was demonstrated that individual cells of these plants can simultaneously absorb and remove considerable amounts of water at constant cell volume, i.e. under stationary conditions. Water absorption is osmosis-driven, and its removal is effected by the cell turgor pressure.

Ograniczanie wyników

2 Acta Physiologiae Plantarum

2 Kargol A.

2 Kargol M.

1 Przestalski M.

1 Suchanek G.

1 2006

1 2005

Wyniki wyszukiwania

Investigations into biophysical regulation mechanisms of physiological water exchange of the Nitella translucens cells with the surroundings

Biophysical mechanisms of physiological water exchange with the surroundings by the cells of the Nitella translucens and Chara corallina plants