Acylhydrolase that catalyzes the hydrolysis of phosphatidylcholine at the sn-1 position. Has a strong galactolipase activity toward monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG). Low triacylglycerol (TAG) lipase activity. Plays a role in plant growth and in leaf senescence. 1,2-diacyl-3-O-[alpha-D-galactosyl-(1->6)-beta-D-galactosyl]-sn-glycerol + H2O = a fatty acid + acyl-3-O-[alpha-D-galactosyl-(1->6)-beta-D-galactosyl]-sn-glycerol + H(+) a 1,2-diacyl-3-O-(beta-D-galactosyl)-sn-glycerol + H2O = a fatty acid + an acyl-3-O-(beta-D-galactosyl)-sn-glycerol + H(+) Ubiquitous. Highest expression in flowers and leaves. Induced during senescence. Induced by wounding (PubMed:24430866). Not induced by wounding (PubMed:18267087). No visible phenotype under standard growth phenotype. Belongs to the AB hydrolase superfamily. Lipase family.