Fig 4.

Concentrations [ng·mg^‒1 dry mass (DM)] of 1,8 cineole (A), linalool (B), eugenol (C), and methyl chavicol (D) of sweet basil ‘Nufar’ (Ocimum basilicum) seedlings grown under radiation intensity (100, 200, 400, or 600 μmol·m^–2·s^–1) for a 16-h photoperiod to create daily light integrals of (6, 12, 23, or 35 mol·m^‒2·d^‒1) for two weeks and then transplanted in a common greenhouse environment and grown for three weeks. Each symbol represents the mean of 20 plants ± se. Lines represent linear or quadratic regression. ** indicates significant at P ≤ 0.01.