Hydrolyzes glycerol-phospholipids at the terminal phosphodiesteric bond to generate phosphatidic acids (PA). Plays an important role in various cellular processes, including phytohormone action, vesicular trafficking, secretion, cytoskeletal arrangement, meiosis, tumor promotion, pathogenesis, membrane deterioration and senescence (PubMed:10441386). Can use phosphatidylserine (PS) and phosphatidylethanolamine (PE) as substrates only in the presence of PIP2. Can use phosphatidylcholine (PC), phosphatidylglycerol (PG) or N-acylphosphatidylethanolamine (NAPE) as substrates in the presence of PE and PIP2 (PubMed:9578608, PubMed:17098468). Involved in membrane lipid modulation under aluminum (Al) stress and negatively modulate plant tolerance to Al (PubMed:22163277). a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1,2-diacyl-sn-glycero-3-phosphate + choline + H(+) Ca(2+). Requires micromolar level (PIP2-dependent). Inhibited by neomycin. Up-regulated by PIP2 binding. Optimum pH is 5.5 to 8.5. Found mainly associated with intracellular membranes but also with mitochondrial membranes, nuclei and clathrin-coated vesicles. Not found in chloroplast. Highly expressed in roots and flowers, moderately in stems, leaves and seedlings and low in siliques. Not detected in seeds. Activated by wounding, heavy metal, methyl salicylate, osmotic and salt stresses (PubMed:11090221, PubMed:17098468). Up-regulated by aluminum stress (PubMed:22163277). C2 domain is a calcium-binding fold, and the binding promotes the protein association with membranes. In PLD gamma, all the calcium-coordinating acidic amino acids are conserved. Increased tolerance to aluminum. Belongs to the phospholipase D family. C2-PLD subfamily. It is uncertain whether Met-1 or Met-11 is the initiator.