Zafar, Hira Effect of ZnO Nanoparticles on Brassica nigra Seedlings and Stem Explants: Growth Dynamics and Antioxidative Response. [electronic resource] - Frontiers in plant science 2016 - 535 p. digital Publication Type: Journal Article ISSN: 1664-462X Standard No.: 10.3389/fpls.2016.00535 doi