In instruction to study the properties of gamma rays on seed germination percentage, plant survival percentage, number of leaves, number of branches and plant height of Solanum lycopersicum L. present trial was lead. Parched seeds of Solanum lycopersicum L. (Var. Garima S1) were exposed with10, 15, 20, 25, 30, 35, 40 and 50 kR at the Bhabha Atomic Research Centre (BARC), Mumbai.The outcome displayed that the gamma radiation exaggerated all the above stated parameters. It was observed that all the traits showed decreasing trend in there mean value with the increasing intensity of gamma irradiation. Seed germination percentage was meaningfully exaggerated and late at higher doses of gamma rays. The highest doses of gamma rays such as 40kR and 50kR exposure caused death of all seedlings and no seed germination was observed.

Keywords : Gamma radiation, morphology, Tomato, Solanum lycopersicum L.