Part of Effect of Exposing the Seeds of Tomato Plant (Solanum Lycopersicum L.) to Diode Laser Rays on the Germination, Growth of Hypocotyl Stems Callus of their Seedlings and its Content of Lycopene. تأثير تعريض بذور نبات الطماطم لأشعة الليزر الدايود في انباتها
