Figure 1.

Identification of hydroxamic acid compounds that promote seed germination. Seed of an LeNCED1-overexpressing tomato line (sp12) were imbibed on filter paper wetted with 1 mM of 12 different hydroxamic acid compounds (D1–D8, D12, D14, D15, and B2), abamine (Ab), or 1.8 mg l⁻¹ norflurazon (Nz). Each solution contained 0.2 mM NaOH and 0.2% DMSO, required for solubilization. The control solution contained only 0.2 mM NaOH and 0.2% DMSO. ^*Indicates significant difference compared to control at p < 0.05. Two independent experiments were carried out in (A,B), with the same control treatment. Floating bars represent least significant difference (LSD) between any two means within an experiment at 5% level, from ANOVA (n = 3).