Acylhydrolase with a broad specificity. Catalyzes the hydrolysis of phosphatidylcholine at the sn-1 position. Moderate activity toward phosphatidylcholine (PC), monogalactosyldiacylglycerol (MGDG), digalactosyldiacylglycerol (DGDG) and triacylglycerol (TAG). May display dual sn-1/sn-2 substrate specificity. Could be involved in early wound response. 1,2-dihexadecanoyl-sn-glycero-3-phosphocholine + H2O = 2-hexadecanoyl-sn-glycero-3-phosphocholine + H(+) + hexadecanoate 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(+) 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(+) Ubiquitous. Highly expressed in leaves. Not induced by wounding (PubMed:18267087). Induced by wounding (PubMed:24430866). No visible phenotype under standard growth phenotype. Decreased dinor-12-oxo-phytodienoic acid (dnOPDA) formation. Major isoform. Belongs to the AB hydrolase superfamily. Lipase family.