Increase of membrane permeability of mitochondria isolated from water stress adapted potato cells.
In order to gain some insight into mitochondria permeability under water stress, intact coupled mitochondria were isolated from water stress adapted potato cells and investigations were made of certain transport processes including the succinate/malate and ADP/ATP exchanges, the plant mitochondrial ATP-sensitive potassium channel (PmitoKATP) and the plant uncoupling mitochondrial protein (PUMP). The Vmax values measured for succinate/malate and ADP/ATP carriers, as photometrically investigated, as well as the same values for the PmitoK(ATP) and the PUMP were found to increase; this suggested that mitochondria adaptation to water stress can cause an increase in the membrane permeability.
Fratianni
A
A
Dipartimento di Scienze Animali, Vegetali e dell'Ambiente, Università del Molise, Campobasso, Italy.
Pastore
D
D
Pallotta
M L
ML
Chiatante
D
D
Passarella
S
S
D000244:Adenosine Diphosphate / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D002352:Carrier Proteins / Q000187:drug effects / Q000378:metabolism; D004734:Energy Metabolism / Q000187:drug effects / Q000502:physiology*; D007425:Intracellular Membranes / Q000187:drug effects / Q000378:metabolism*; D007473:Ion Channels; D008293:Malates / Q000378:metabolism; D008565:Membrane Proteins / Q000187:drug effects / Q000378:metabolism; D008928:Mitochondria / Q000187:drug effects / Q000378:metabolism*; D000226:Mitochondrial ADP, ATP Translocases / Q000187:drug effects / Q000378:metabolism; D024101:Mitochondrial Proteins; D008954:Models, Biological; D010539:Permeability; D015221:Potassium Channels / Q000187:drug effects / Q000378:metabolism; D011198:Solanum tuberosum / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D019802:Succinic Acid / Q000378:metabolism; D000071256:Uncoupling Protein 1; D014882:Water-Electrolyte Balance / Q000187:drug effects / Q000502:physiology*
D002352:Carrier Proteins; D007473:Ion Channels; D008293:Malates; D008565:Membrane Proteins; D024101:Mitochondrial Proteins; D015221:Potassium Channels; D000071256:Uncoupling Protein 1; D000244:Adenosine Diphosphate; D000255:Adenosine Triphosphate; D000226:Mitochondrial ADP, ATP Translocases; D019802:Succinic Acid