Plays a role in cell growth. Hydrolyzes membrane phospholipids, such as PtdCho free headgroup and PtdOH (phosphatidic acid; signaling molecule on its own). Involved in the inhibition of actin-based motility and endocytosis. Its inhibition causes complete collapse of F-actin organization. a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1,2-diacyl-sn-glycero-3-phosphate + choline + H(+) Inhibited by butan-1-ol. Expressed consistently in both vegetative and developing cells. Belongs to the phospholipase D family.