Effect of sodium selenate on photosynthetic efficiency, antioxidative defence system and micronutrients in maize (Zea mays)
Oxidative stress or formation of faulty proteins due to non-specific replacement of sulphur by selenium(Se)/mineral imbalance can be one of the reasons for Se phytotoxicity. Present investigation reports the effect of Se on photosynthetic efficiency, anti-oxidative status and micronutrients in maize. Selenate-Se application (1–32 mg kg−1 soil) showed significant growth reduction after 30 days of sowing and all the plants died with concentration higher than 4 mg kg−1 soil. Lower Se doses increased dry matter, chlorophyll, proline and activities of defence enzymes viz. peroxidase, catalase and superoxide dismutase and decreased malondialdehyde, glutathione and glutathione reductase activity as compared to control. All the parameters showed the reverse trend with Se treatment of 4 mg kg−1 soil. Concentration of nutrients (K, P, S, Mn, Mg and Ca) in leaves decreased with application of increasing Se doses. Shoot and root weight decreased (8.5–31.9% and 12–24%, respectively) in response to varying Se doses and highest Se accumulation in these tissues was observed with Se @ 4 mg kg−1 soil. The phyto-toxic effects of higher Se doses may be due to its prooxidant effects and disturbances in nutrients level.
KeywordsBiochemical composition Growth Selenium Maize
The authors are thankful to CSIR, New Delhi (38(1362/13/EMR-II) for financial support and research fellowship to AS.
- Aebi H (1983) Catalase. In: Bergmeyer HO (ed) Methods of enzymatic analysis, vol 111. Academic Press, New York, 273ppGoogle Scholar
- Garousi F, Veres S, Bódi É, Várallyay S, Kovács B (2015) Role of selenite and selenate uptake by maize plants in chlorophyll A and B content. Int J Biol Biomolec Agric Food Biotechnol Engineer 9:625–668Google Scholar
- Garousi F, Veres S, Bódi É, Várallyay S, Kovács B (2016) Assessment and comparison of selenium-enriched maize with sodium selenite and sodium selenate. Agrártudományi Közlemények 68:11–15Google Scholar
- Hawrylak-Nowak B (2008) Effect of selenium on selected macronutrients in maize plants. J Elem 13:513–519Google Scholar
- Pazurkiewicz-Kocot K, Galas W, Kita A (2003) The effect of selenium on the accumulation of some metals in Zea mays L. plants treated with indole-acetic acid. Cell Mol. Biol Lett 8:97–103Google Scholar
- Saffaryazdi A, Lahouti M, Ganjeali A, Byat H (2012) Impact of selenium supplementation on growth and accumulation on spinach (Spinacia oleracea L.) plants. Not Sci Biol 4:95–100Google Scholar
- Witham FH, Blaydes DF, Devlin RM (1971) Experiments in plant physiology. Van Nostrand, New York, 245ppGoogle Scholar