Permeability and Line-Tension-Dependent Response of Polyunsaturated Membranes to Osmotic Stresses.

ABSTRACT: The lipidome of plant plasma membranes-enriched in cellular phospholipids containing at least one polyunsaturated fatty acid tail and a variety of phytosterols and phytosphingolipids-is adapted to significant abiotic stresses. But how mesoscale membrane properties of these membranes such as permeability and deformability, which arise from their unique molecular compositions and corresponding lateral organization, facilitate response to global mechanical stresses is largely unknown. Here, using giant vesicles reconstituting mixtures of polyunsaturated lipids (soy phosphatidylcholine), glucosylceramide, and sitosterol common to plant membranes, we find that the membranes adopt "janus-like" domain morphologies and display anomalous solute permeabilities. The former textures the membrane with

SUBMITTER: Emami S 

PROVIDER: S-EPMC6303272 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature