Acyltransferase involved in fatty acid phytyl ester synthesis in chloroplasts, a process required for the maintenance of the photosynthetic membrane integrity during abiotic stress and senescence (PubMed:22623494). Exhibits phytyl ester synthesis and diacylglycerol acyltransferase activities with broad substrate specificities, and can employ acyl-CoAs, acyl carrier proteins, and galactolipids as acyl donors (PubMed:22623494). a 1,2-diacyl-3-O-(beta-D-galactosyl)-sn-glycerol + a 1,2-diacylglycerol = a triacylglycerol + an acyl-3-O-(beta-D-galactosyl)-sn-glycerol a 1,2-diacylglycerol + a fatty acyl-CoA = a triacylglycerol + CoA a 1,2-diacylglycerol + a fatty acyl-[ACP] = a triacylglycerol + holo-[ACP] a fatty acyl-CoA + phytol = a fatty acid phytyl ester + CoA phytol + tetradecanoyl-CoA = CoA + tetradecanoate phytyl ester a 1,3-diacylglycerol + a fatty acyl-CoA = a triacylglycerol + CoA 1,2-dihexanoylglycerol + tetradecanoyl-CoA = 1,2-dihexanoyl-3-tetradecanoylglycerol + CoA 1,2-dihexanoylglycerol + hexadecanoyl-CoA = 1,2-dihexanoyl-3-hexadecanoylglycerol + CoA 1,2-dihexanoylglycerol + octadecanoyl-CoA = 1,2-dihexanoyl-3-octadecanoylglycerol + CoA (7Z,10Z,13Z)-hexadecatrienoyl-CoA + 1,2-dihexanoylglycerol = 1,2-dihexanoyl-3-(7Z,10Z,13Z-hexadecatrienoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1,2-dihexanoylglycerol = 1,2-dihexanoyl-3-(9Z-octadecenoyl)-glycerol + CoA (9Z,12Z,15Z)-octadecatrienoyl-CoA + 1,2-dihexanoylglycerol = 1,2-dihexanoyl-3-(9Z,12Z,15Z-octadecatrienoyl)-glycerol + CoA decanoyl-CoA + phytol = CoA + decanoate phytyl ester (7Z,10Z,13Z)-hexadecatrienoyl-CoA + phytol = (7Z,10Z,13Z)-hexadecatrienoate phytyl ester + CoA dodecanoyl-CoA + phytol = CoA + dodecanoate phytyl ester Highly expressed during senescence. Accumulates upon nitrogen deprivation. Plants lacking both PES1 and PES2 grow normally but show reduced phytyl ester and triacylglycerol accumulation. Belongs to the diacylglycerol acyltransferase family.