Unsaturation of very-long-chain ceramides regulates hypoxia response by modulating ethylene signaling in Arabidopsis

ABSTRACT: Lipid remodeling is crucial for hypoxic tolerance in animals, whilst little is known about the hypoxia-induced lipid dynamics in plant cells. Here we performed a mass spectrometry-based analysis to survey the lipid profiles of Arabidopsis rosettes under various hypoxic conditions. We observed that hypoxia caused a significant increase in total amounts of phosphatidylserine, phosphatidic acid and oxylipins, but a decrease in phosphatidylcholine (PC) and phosphatidylethanolamine (PE). Particularly, significant gains in the polyunsaturated species of PC, PE and phosphatidylinositol, and losses in their saturated and mono-unsaturated species were evident during hypoxia. Moreover, hypoxia led to a remarkable elevation of ceramides and hydroxyceramides. Depletion of ceramide synthases LOH1, LOH2

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Lujun Yu 

PROVIDER: E-GEOD-59719 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress