Biotechnology ,Molecular Biology, Nanotechnology Use a modern methods (electrophoresis, SDS-PAGE, A-PAGE, Cleaved amplified polymorphic sequence (CAPS), internal transcribed spacer (ITS), SSR, ISSR, AFLP and RAPD, transgenic with Agrobacterium, plant tissue culture, Nanotechnology studying of physiological and biochemical indices as a screening technique for stress tolerance in plant. ABA Abscisic acid, DREB dehydration- responsive element binding protein- ROS reactive oxygen species- proline- polyethylene glycol) Biosynthesis Of Nanoparticles