Table 2. Abscisic acid (ABA) and 12-oxo-phytodienoic acid (OPDA) concentrations in the embryo and external structures of immature Phaseolus vulgaris L. seeds.

Tissue	Weight (mg FW)	OPDA (pg/mg FW)	ABA (pg/mg FW)
Embryo	113 ± 7	53 ± 24	1844 ± 478
External structures	59 ± 1	8164 ± 1549	103 ± 52

ABA and OPDA in aqueous methanol (80%) extracts of embryo and external structures separated from four different immature seeds were quantified by liquid chromatography-electrospray ionisation-tandem mass spectrometry (LC-ESI-MS/MS) analysis. Concentrations of ABA and OPDA in embryo and external structures are shown per mg of fresh weight (FW). Each value is represented by the mean ± standard deviation (n = 4).