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Journal of Biological Sciences

Year: 2016 | Volume: 16 | Issue: 4 | Page No.: 128-135
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Authors

Kourosh Delavar

Shekoofeh Enteshari

Shahnaz Gagoonani

Saeed Kamali

Keywords

Background: Silicon has beneficial effects on the plant growth by alleviating of biotic and abiotic stresses. The aimed of the present experiment was the study of the effect of silicon nutrition on the Borago officinalis under aluminum stress condition. Materials and Methods: Interaction of four concentrations of silicon (0, 0.2, 1 and 2 mM) and three concentrations of aluminums (0, 20 and 60 mM) on the biomass and mineral (Ca, K and P) content of Borago officinalis were investigated under hydroponic condition. The experiment was based on a randomized block design with tree replicates. Results: Results of present study clearly demonstrated the alleviation role of Si in borage under Al stress conditions. Also, the results demonstrated the absorption of both aluminum and silicon by Borago officinalis, so that the highest contents of silicon and the aluminum was observed in the Si 0.2 mM and Al 60 mM treatments, respectively. The results showed that the presence of silicon or aluminum in the nutrient solution significantly increased the calcium (Ca), phosphorous (P) and potassium (K) content of plants, especially in the shoots. However, combination of Si with Al significantly decreased the content of all mentioned elements in the borage. On the other hand, Al and Si have an antagonistic interaction, because silicon almost in all treatments reduced the Al content of plant and vice versa. Conclusion: The results of present study suggested that Al and Si have an antagonistic effect on the mineral content of plants and probably silicon by decreasing of Al absorption in borage, reduced its toxicity.
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