IMPACT OF ZINC OXIDE NANO PARTICLES ON SEED GERMINATION AND ROOT GROWTH
Journal Title: IJAR-Indian Journal of Applied Research - Year 2019, Vol 9, Issue 2
Abstract
In this study, the phytotoxicity of metal oxide nano particle (NP) of zinc oxide (nano ZnO) and their counter parts (bulk ZnO) was assessed on seed germination and root growth of eight agriculturally worldwide used food crop plants (Rice, Soybean, Wheat, Cucumber, Sunower, Lettuce, Maize and Tomato): The seed germination percentage and root length at different concentrations (0, 2, 10, 20, 50, 200 and1000 mg/L) of the nano ZnO and bulk ZnO was studied. The results showed that the inhibition on root length and root growth was observed, but there are no effects on the seed germination of all crops. The metal oxides (nano ZnO and bulk ZnO) Inhibition on root growth varied greatly among the varieties of plants studied. Suspensions of 1000 mg/L nano ZnO practically terminated root elongation of all the tested plant species. Fifty percent root growth inhibitory concentrations (IC50) of nano ZnO was estimated to near 50 mg/L for lettuce, Cucumber, Sunower, Soybean, and Tomato and near 100 mg/L for Maize, Wheat, and Rice. The inhibition occurred for the duration of the seed incubation process rather than soaking process. From the above study reveals that the ZnO nano particles show toxic effects to the plants than their counter parts. So, some care needs to be taken for the disposal of different products containing nano particles into the environment and ecosystem.
Authors and Affiliations
Naveetha Gaggara, Atmakuru Ramesh
Keywords
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