Sn-1-specific phospholipase that releases free fatty acids from phospholipids. Low activity on galactolipids and triacylglycerols. Catalyzes the initial step of jasmonic acid biosynthesis. Not essential for jasmonate biosynthesis after wounding or upon pathogen infection. a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 2-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine + H2O = 2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine + H(+) + hexadecanoate Optimum pH is 6.0-6.5. Expressed in flower buds, but not in leaves or roots. Restricted to the stamen filaments immediately before flower opening. Induced by wounding (PubMed:11595796, PubMed:18267087, PubMed:20348210, PubMed:24430866). Induced by methyl jasmonate (PubMed:24430866). Defective in anther dehiscence and pollen maturation. Delayed flower buds opening. Directly regulated at the transcription level by the floral homeotic gene AGAMOUS. Belongs to the AB hydrolase superfamily. Lipase family. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus.