Acid lipase that can hydrolyze a range of triacylglycerols but is not active on phospholipids (PubMed:15322116). In vitro, hydrolyzes triolein, trilinolein, triricinolein, tripalmitin, trilaurin and tricaprin (PubMed:15322116). May play a role in the regulation of lipolysis in germinating seeds (PubMed:15322116). a triacylglycerol + H2O = a diacylglycerol + a fatty acid + H(+) Optimum pH is 4-4.5. Associates with the oil body membrane in seed endosperm. Expressed in dry seeds and germinating seeds until 4 days after soaking (at protein level). Belongs to the AB hydrolase superfamily. Lipase family.