Glycerolipid synthesis and lipid trafficking in plant mitochondria. (1st August 2016) - Michaud, Morgane
Abstract : Lipid trafficking between mitochondria and other organelles is required for mitochondrial membrane biogenesis and signaling. This lipid exchange occurs by poorly understood nonvesicular mechanisms. In yeast and mammalian cells, this lipid exchange is thought to take place at contact sites between mitochondria and the ER or vacuolar membranes. Some proteins involved in the tethering between membranes or in the transfer of lipids in mitochondria have been identified. However, in plants, little is known about the synthesis of mitochondrial membranes. Mitochondrial membrane biogenesis is particularly important and noteworthy in plants as the lipid composition of mitochondrial membranes is dramatically changed during phosphate starvation and other stresses. This review focuses on the principal pathways involved in the synthesis of the most abundant mitochondrial glycerolipids in plants and the lipid trafficking that is required for plant mitochondria membrane biogenesis. Abstract : Mitochondrial membrane biogenesis requires lipid trafficking to and within mitochondria. This trafficking is particularly important in plants, which dramatically alters mitochondria lipid composition in response to some environmental stress. This minireview summarizes what we know about mitochondrial lipid trafficking in plants and highlights the future challenges in this field.