Role of phosphatidic acid in plant galactolipid synthesis

► Phosphatidic acid is an intermediate in both phospholipid and galactolipid syntheses. ► We review the pools of phosphatidic acid dispatched in the plant cell membranes. ► We examine how modification of PA pools affects plant cell biology. ► PA regulates the essential MGDG synthase in formation of photosynthetic membranes.