Ozone-induced Loss of Intracellular Potassium Ion from Chlorella sorokiniana12
AUTOR(ES)
Chimiklis, Phrosene E.
RESUMO
The unicellular algae Chlorella sorokiniana was used as a model system to investigate the interaction of ozone with plant cell membranes. Ozone induces K+ leakage from Chlorella sorokiniana similar to the electrolytic loss observed from many higher plants under stressful conditions. The kinetics of this leakage indicate that ozone initially interacts reversibly (within sec) with sites on membranes allowing a passive efflux of K+. This efflux ceases within minutes after the ozone stress is removed. This return to normal efflux is very temperature dependent. High intracellular osmolarity seems to be an important criterion of susceptibility to ozone injury in this model system, since rates of ozone-induced K+ leakage are less when the external osmotic potential is decreased by suspension of the cells in mannitol. Cell interaction with ozone is further complicated by a saturating-type dependence of the K+ efflux upon ozone concentration within the medium.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=541910Documentos Relacionados
- Ozone-induced Fatty Acid and Viability Changes in Chlorella12
- Jasmonic Acid Signaling Modulates Ozone-Induced Hypersensitive Cell Death
- Ozone-Induced Expression of Stress-Related Genes in Arabidopsis thaliana.
- Ethylene Insensitivity Modulates Ozone-Induced Cell Death in Birch1
- Ozone-induced oxygen radical release from bronchoalveolar lavage cells and airway hyper-responsiveness in dogs.
