Some aspects of the phytotoxic action of fusaric acid on primary Ricinus roots
| Autor: | I. Mistrík, M. Prokop, J. Pavlovkin |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
0301 basic medicine
Membrane potential biology Activator (genetics) Chemistry Ricinus Cell Soil Science Depolarization Mitochondrion biology.organism_classification 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology medicine.anatomical_structure Biochemistry Fusicoccin medicine Fusaric acid |
| Zdroj: | Plant, Soil and Environment. 50:397-401 |
| ISSN: | 1805-9368 1214-1178 |
| DOI: | 10.17221/4050-pse |
| Popis: | Fusaric acid, at a concentration of 1mM induced at pH 5.5 an early hyperpolarisation was followed by a marked depolarisation of membrane potential difference. During this time increased electrolyte leakage from the primary Ricinus roots was determined. At higher pH values (6.5 and 8) the depolarisation caused by fusaric acid was immediate without hyperpolarisation observed at pH 5.5. Simultaneous exposure of the roots to P-ATPase activator fusicoccin and fusaric acid (pH 6.5) diminished the hyperpolarising effect of fusicoccin. The present results suggest that the dissoci ated form of fusaric acid does directly affect particular cell targets (plasmalemma, mitochondria) and viability of root cells decreased with the time of exposure and concentration of fusaric acid. |
| Databáze: | OpenAIRE |
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