Effect of selenium on growth and some physiological traits of basil under arsenic stress conditions

Document Type : Research Paper

Authors

1 Damghan Branch, Islamic Azad University

2 Islamic Azad University, Tehran North Branch

3 Azad University of Neyshabur

4 Neyshabur Branch, Islamic Azad University

Abstract

Past studies have already determined that selenium is very effective in alleviating oxidative damage caused by various abiotic stresses in plants. This study investigated the effects of selenium on the growth and physiological traits of basil under arsenic toxicity. The results showed that growth parameters including root and shoot length and root and shoot weight under arsenic toxicity, especially at high concentrations, were significantly reduced compared to the control plants. Also, in severe arsenic toxicity, the content of photosynthetic pigments, nitrogen, and protein concentrations decreased and the activity of catalase and superoxide dismutase enzymes increased compared to the basil plants without stress. Selenium foliar spray, especially at a concentration of 5 mg/l on plants, both under stress and without stress, led to increased growth parameters, photosynthetic pigments, nitrogen, and protein content. In addition, the use of sodium selenate at low concentrations reduced the activity of antioxidant enzymes and at high concentrations increased their activity under arsenic toxicity compared to control plants. In general, it seems that selenium has reduced the toxic effects of arsenic in basil by enhancing its antioxidant activity and improving plant growth.

Keywords

Main Subjects


Articles in Press, Accepted Manuscript
Available Online from 30 October 2021
  • Receive Date: 03 January 2021
  • Revise Date: 02 July 2021
  • Accept Date: 18 September 2021
  • First Publish Date: 30 October 2021