Volume 16, Issue 1 (Journal of Soil and Plant Interactions 2025)
2025, 16(1): 37-53 |
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Department of Soil Science and Engineering, Faculty of Agriculture, University of Maragheh
Abstract: (855 Views)
Background and Objective: Biosurfactants are amphiphilic molecules produced by living organisms, particularly bacteria. Recent studies have shown their potential to act as plant growth stimulants. Therefore, the objective of this study was to evaluate the effects of biosurfactants on plant growth.
Methods: To achieve this, biosurfactant-producing bacteria were initially isolated from the phyllosphere of wild plants. Subsequently, biosurfactants were extracted and purified. After evaluating their quality, four superior biosurfactants were selected and addressed by S1 to S4 codes. A pot experiment was conducted in the greenhouse using a completely randomized factorial design to assess the effects of foliar spraying at concentrations of 0, 0.1, 0.2, and 0.4 g L-1 on the growth stimulation of spearmint and radish plants. At the end of the experiment, the plants’ growth traits were measured and evaluated.
Results: The effect of biosurfactants was strongly influenced by their applied concentrations. Among the concentrations, the highest and lowest growth stimulation were observed at 0.1 and 0.4 g L-1, respectively. Additionally, the type of biosurfactant was found to play a significant role in growth stimulation. Biosurfactant S1 exhibited the most pronounced stimulatory effect, where the highest fresh weight of radish tubers was recorded under the S1 biosurfactant treatment with 0.1 g L-1, showing a 333% increase compared to the control. Similarly, in spearmint, the highest fresh weight was observed in the same treatment (S1-0.1), showing a 51% increase compared to the control.
Conclusion: Therefore, biosurfactants, especially when used at optimal concentrations, appear to have a high potential for stimulating plant growth and improving plant quality. These compounds could serve as sustainable and environmentally friendly technologies for optimizing plant performance and agricultural productivity.
Methods: To achieve this, biosurfactant-producing bacteria were initially isolated from the phyllosphere of wild plants. Subsequently, biosurfactants were extracted and purified. After evaluating their quality, four superior biosurfactants were selected and addressed by S1 to S4 codes. A pot experiment was conducted in the greenhouse using a completely randomized factorial design to assess the effects of foliar spraying at concentrations of 0, 0.1, 0.2, and 0.4 g L-1 on the growth stimulation of spearmint and radish plants. At the end of the experiment, the plants’ growth traits were measured and evaluated.
Results: The effect of biosurfactants was strongly influenced by their applied concentrations. Among the concentrations, the highest and lowest growth stimulation were observed at 0.1 and 0.4 g L-1, respectively. Additionally, the type of biosurfactant was found to play a significant role in growth stimulation. Biosurfactant S1 exhibited the most pronounced stimulatory effect, where the highest fresh weight of radish tubers was recorded under the S1 biosurfactant treatment with 0.1 g L-1, showing a 333% increase compared to the control. Similarly, in spearmint, the highest fresh weight was observed in the same treatment (S1-0.1), showing a 51% increase compared to the control.
Conclusion: Therefore, biosurfactants, especially when used at optimal concentrations, appear to have a high potential for stimulating plant growth and improving plant quality. These compounds could serve as sustainable and environmentally friendly technologies for optimizing plant performance and agricultural productivity.
Type of Study: Research |
Subject:
Plant growth promoting microrganisms in the rhizosphere
Received: 2025/01/12 | Accepted: 2025/04/20 | Published: 2024/03/29
Received: 2025/01/12 | Accepted: 2025/04/20 | Published: 2024/03/29
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Journal of Soil and Plant Interactions by http://jspi.iut.ac.ir is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.
This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.
