Defense related decadienal elicits membrane lipid remodeling in the diatom Phaeodactylum tricornutum.

ABSTRACT: Diatoms rapidly release extracellular oxylipins (oxygenated lipids) including polyunsaturated aldehydes in response to herbivory and other stresses. Oxylipins have several defense-related activities including inhibition of reproduction in herbivores and signaling to distant diatoms. Physiological changes in diatoms exposed to varying levels of oxylipins are only beginning to be understood. In this study, Phaeodactylum tricornutum cultures were treated with sublethal concentrations of the polyunsaturated aldehyde trans,trans-2,4-decadienal (DD) to assess effects on lipid composition and membrane permeability. In cells treated with DD for 3 hr, all measured saturated and unsaturated fatty acids significantly decreased (0.46-0.69 fold of levels in solvent control cells) except for 18:2 (decre

SUBMITTER: Sabharwal T 

PROVIDER: S-EPMC5459460 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature