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ZnO Nanoparticles Induced Synthesis of Polysaccharides and Phosphatases by Aspergillus Fungi

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The effect of ZnO nanoparticles (spherical, 16–30 nm) on production of polysaccharides, phosphatases and phytase was studied on two fungi Aspergillus terreus CZR1 (JF 681300) and Aspergillus flavus CZR2 (JF 681301). The fungi were tested for the yield of polysaccharides as well as phosphatases (acid and alkaline) and phytase in presence of identical concentration of ZnO compound. The result suggested 8 to 9 folds improvement in extracellular polysaccharide secretion due to ZnO nanoparticle. The intracellular polysaccharide content also improved between 5 to 8 folds. ZnO nanoparticles also enhanced 51 to 108% acid phosphatase and 80 to 209% alkaline phosphatase activity. The phytase activity improved between 137 and 174%. In general, significant effect of ZnO nanoparticles was observed in production of acid phosphatase (4.9 to 14.3%), alkaline phosphatase (14.6 to 22.1%), phytase (25.0 to 144.7%), extracellular polysaccharides (104.7 to 837.3%) and intracellular polysaccharides (246.2 to 374.3%) as compared to bulk ZnO material of similar concentration. The results suggested that ZnO nanoparticles are very effective in synthesis of fungal polysaccharides and phosphatases compared to bulk ZnO.
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Document Type: Research Article

Publication date: 01 August 2012

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  • Advanced Science, Engineering and Medicine (ASEM) is a science, engineering, technical and medical journal focused on the publishing of peer-reviewed multi-disciplinary research articles dealing with all fundamental and applied research aspects in the areas of (1) Physical Sciences, (2) Engineering, (3) Biological Sciences/Health Sciences, (4) Medicine, (5) Computer and Information Sciences, (6) Mathematical Sciences, (7) Agriculture Science and Engineering, (8) Geosciences, and (9) Energy/Fuels/Environmental/Green Science and Engineering.
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