Biologia plantarum 53:789-792, 2009 | DOI: 10.1007/s10535-009-0145-5

Evaluation of zinc accumulation potential of Hydrilla verticillata

S. Srivastava1,4,*, S. Mishra1, S. Dwivedi1, R. D. Tripathi1, P. K. Tandon2, D. K. Gupta3
1 Ecotoxicology and Bioremediation Group, National Botanical Research Institute, Lucknow, India
2 Department of Botany, Lucknow University, Lucknow, India
3 Estacion Experimental Del Zaidin, CSIC, Granada, Spain
4 Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Trombay, Muumbai, India

Biofortification of foods with essential micronutrients and phytoremediation of the contaminated sites are the two sides of the same coin for metals like zinc. In the present study, Zn accumulation potential, growth and antioxidant status of Hydrilla verticillata (L.f.) Royle plants were studied upon supplementation of Zn (0-5 000 µM) for 2 and 7 d. At 5000 µM Zn, plants accumulated about 7.60 and 18.07 mg(Zn) g-1(d.m.) after 2 and 7 d, respectively. Plants exposed to Zn concentrations up to 500 µM showed significantly increased contents of low molecular mass antioxidants and activities of antioxidant enzymes in comparison with controls. Only upon exposure of plants to 5 000 µM Zn, toxicity was observed after 7 d. Therefore, owing to their high Zn accumulation capacity, Hydrilla plants may be used both as a Zn source (via culturing in ca. 100 µM Zn supplemented nutrient medium) or as a phytoremediator.

Keywords: antioxidants; food supplement; phytoremediation
Subjects: ascorbate peroxidase; carotenoids; catalase; chlorophyll a,b; cysteine; guaiacol peroxidase; Hydrilla verticillata; malondialdehyde; phytoremediation; superoxide dismutase (SOD); zinc

Received: February 11, 2009; Accepted: August 27, 2009; Published: December 1, 2009Show citation

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Srivastava, S., Mishra, S., Dwivedi, S., Tripathi, R.D., Tandon, P.K., & Gupta, D.K. (2009). Evaluation of zinc accumulation potential of Hydrilla verticillata. Biologia plantarum, 53(4), 789-792. doi: 10.1007/s10535-009-0145-5.
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