Биоэлектрогенез у высших растений - Опритов В.А.
ISBN 5-02-004108-4
Скачать (прямая ссылка):
Литература ............................................................... 194
CONTENTS
Abbreviations................................................................................ 3
Introduction................................................................................. 4
BIOELECTROGENESIS OF HIGHER PLANT CELLS AT REST................................................ 6
1. Methodical peculiarities of resting potential measurement in higher plant cells............. 6
Measurement of resting potential with the help of electrodes.............................. 6
Measurement of resting potential by fluorescent probe method............................... 9
2. Electrical activity of structural elements of plant cell at rest............................ 10
Cell wall potential....................................................................... 10
Plasmalemma potential..................................................................... Ю
Tonoplast potential....................................................................... 11
Potentials of mitochondria and chloroplasts................................................ 12
Potentials of other stiuctural elements of cell............................................ j2
Interpretation of intercellular measurement of resting potential in higher plants. Contribution of plasmjilemma potential............!...................................... 13
3. Resting potential of higher plant cell as the sum of diffusion and metabolic components.... IS
Value of cell resting potential. Contributions of diffusion and metabolic components...... 15
Metabolic component of resting potential at dark........................................... 19
Light-induced metabolic component of resting potential..................................... 21
4. Nature of passive component of resting potential............................................ 22
Mechanism of passive ion permeability of membranes......................................... 23
Role of K+ for diffusion potential generation..............................................’25
Goldman equation. Roles of Na+ and СГ for diffusion potential generation.................. 29
5. Nature of metabolic component of resting potential. Electrogenic pumps......................32
H+-ATPase of plasm alemma and its participation in generation of membrane potential
metabolic component....................................................................... 32
Redox chain of plasmalemma and its role for cell electrogenesis............................ 3g
Electrogenic properties of H+-ATPase and pyrophosphatase of tonoplast..................... 41
Is Ca2+-ATPase of plasmalemma an electrogenic pump?Effect of Ca2+ on electrogenic
component of testing potential............................................................ 42
Na+, K+-ATPase of plasmalemma and other possible electrogenic systems..................... 44
Equivalent electrical circuit of plasmalemma.Resting potential equation....................46
6. Factors modifying the electrogenesis of higher plant cells as rest.......................... 47
Temperature factor........................................................................ 47
Light..................................................................................... 53
Plant hormones............................................................................ 57
Other factors............................................................................. 62
7. Role of structural lability of cell membranes for resting potential regulation..............65
8. Role of resting potential for life activity of higher plant cells...........................71
ACTION POTENTIALS IN HIGHER PLANTS.............................................................85
9. Types of impulsive electrical activity in higher plants..................................... 85
Action potential.......................................................................... 86
Variation potential....................................................................... 91
Microihythmes............................................................................. 93
Other types of electrical impulse activity................................................ 95
213
