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Biotechnology Reports
Vol. 5, 2015, Pages: 22–26

TiO2 nanoparticle biosynthesis and its physiological effect on mung bean (Vigna radiata L.)

Ramesh Raliya, Pratim Biswas, J.C. Tarafdar

Department of Energy, Environmental and Chemical Engineering Washington University in St. Louis, St. Louis, MO 63130, USA.


TiO2 nanoparticle (NPs) biosynthesis is a low cost, ecofriendly approach developed using the fungi Aspergillus flavus TFR 7. To determine whether TiO2 NPs is suitable for nutrient, we conducted a two part study; biosynthesis of TiO2 NP and evaluates their influence on mung bean. The characterized TiO2 NPs were foliar sprayed at 10 mgL-1 concentration on the leaves of 14 days old mung bean plants. A significant improvement was observed in shoot length (17.02%), root length (49.6%), root area (43%), root nodule (67.5%), chlorophyll content (46.4%) and total soluble leaf protein (94%) as a result of TiO2 NPs application. In the rhizosphere microbial population increased by 21.4–48.1% and activity of acid phosphatase (67.3%), alkaline phosphatase (72%), phytase (64%) and dehydrogenase (108.7%) enzyme was observed over control in six weeks old plants owing to application of TiO2 NPs. A possible mechanism has also been hypothesized for TiO2 NPs biosynthesis.

Keywords: Nanobiotechnology; TiO2; Mung bean.

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