PA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides. Releases lysophospholipids (LPLs) and free fatty acids (FFAs) from membrane phospholipids in response to hormones and other external stimuli. Plays a role in pollen development and germination and tube growth. a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) Binds 1 Ca(2+) ion per subunit. Strongly expressed in mature flowers but weakly expressed in other tissues. Detected in buds, open flowers and in pollen. Expressed during pollen germination and tube growth. The enzyme has a slight preference for phosphatidylethanolamine over phosphatidylcholine. Belongs to the phospholipase A2 family.