Effect of Ca2+ channel blockers on glycerol levels in Dunaliellatertiolecta under hypoosmotic stress

摘要

The role of Ca2+ in glycerol dissimilation under hypoosmotic stress in the halotolerant alga Dunaliella tertiolecta was investigated using a pharmacological approach. A stretch-activated Ca2+ channel blocker, CdCl3, inhibited glycerol dissimilation under hypoosmotic stress. However, addition of voltage-dependent Ca2+ channel blockers and inhibitors of mitochondrial and endoplasmic reticulum Ca2+ channels did not affect the glycerol dissimilation under hypoosmotic stress. The results of the present study suggest that the influx of Ca2+ from the extracellular space via the stretch-activated Ca2+ channels localized in the plasma membrane is required for the transduction of osmotic signal of D. tertiolecta.