Effect of Bacillus cereus and selenium on some morpho-physiological characteristics and ion content of Salsola arbuscula under lead stress

Document Type : Research Paper

Authors

1 PhD student in Desert Management

2 Professor, Faculty of Natural Recourses Yazd University

3 Associate Professor, Faculty of Natural Resources, Yazd University

4 Associate Professor, Brigand University

10.29252/aridbiom.2024.20802.1968

Abstract

In recent years, due to the development of mining operations, all kinds of heavy metals have entered the natural fields. Soil contamination with heavy metals has become an environmental crisis due to their long-term stability in the soil and entering the food chain. This research was conducted with the aim of evaluating the effect of plant growth promoting bacteria (Bacillus cereus) and selenium on the phytoremediation ability of Salsola arbuscula in lead-contaminated soil. For this purpose, a factorial experiment was conducted in the form of a completely randomized design in three replications, where the investigated factors included lead concentration with three levels (control, 100 and 200 mg/kg soil), plant growth promoting bacteria and selenium each was considered with two levels. The results showed that the increase in lead decreased the absorption of elements, the amount of chlorophyll, and the dry weight of the plant, and caused a significant increase in proline and anthocyanin and the accumulation of lead in the roots. The simultaneous use of selenium and Bacillus cereus increased root lead by 40%, plant dry weight by 29%, chlorophyll by 36%, and potassium, magnesium, and iron by 17, 18, and 27%. The simultaneous use of selenium and Bacillus cereus decreased anthocyanin by 30% and proline by 20%. Considering the accumulation of lead in the roots of Salsola arbuscula, it was concluded that this plant is suitable for the process of phytostabilization in lead-contaminated soils, and Bacillus cereus and selenium increased its phytoremediation ability by improving the biochemical conditions.

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Journal of Arid Biome

Articles in Press, Accepted Manuscript
Available Online from 05 March 2024

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