Volume 17, Issue 1 (Journal of Soil and Plant Interactions 2026)
2026, 17(1): 1-19 |
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1- Department of Arid Land and Desert Management. Faculty of Natural Resources Yazd University, Iran
2- Department of Environmental Sciences, Faculty of Natural Resources, Yazd University, Iran ,amosleh@yazd.ac.ir
3- Department of Soil Science, University of Tehran, Iran
4- Department of Nature Engineering, University of Kashan, Iran
2- Department of Environmental Sciences, Faculty of Natural Resources, Yazd University, Iran ,
3- Department of Soil Science, University of Tehran, Iran
4- Department of Nature Engineering, University of Kashan, Iran
Abstract: (425 Views)
Background and Objective: Considering the increase of aridity and dust in arid and semi-arid regions, this study investigated the effects of drought stress and dust, as well as the role of plant growth-promoting bacteria (PGPB), including Bacillus amyloliquefaciens and B. halotolerans, on the yield and fatty acid composition of camellia seeds.
Methods: A factorial experiment was conducted in a randomized complete blocks design with different treatments in farm conditions. The treatments included: plant growth-promoting bacteria (in three levels, control, and inoculation with B. amyloliquefaciens and B. halotolerans), two irrigation levels (irrigation periods of 4 and 8 days), and the two dust levels (without dust and with dust application). To prepare dust, soil samples were collected from critical dust hotspots in Isfahan province, Aran, and Bidgol counties. Supercritical fluid extraction was used to extract the plant oil.
Results: The results showed that low irrigation and dust significantly reduced seed weight, dry weights of shoot and root, and oil content. Additionally, the profile of fatty acids changed under the influence of drought and dust stresses; the amounts of myristoleic acid, alpha-linolenic acid, and eicosatrienoic acid decreased by 33, 21, and 28%, respectively. The results showed that the use of plant growth-promoting bacteria increased some fatty acids such as linoleic, alpha-linolenic, oleic, palmitic and stearic acids and decreased palmitoleic and myristolic acids, and did not cause any change in other fatty acids. In total, the inoculation of the mentioned bacteria reduced the negative effects of stress, allowing for increased growth of roots and aerial organs, maintaining oil content, and improving the ratio of monounsaturated to polyunsaturated fatty acids.
Conclusion: It is recommended to use B. amyloliquefaciens and B. halotolerans as an effective strategy to reduce the negative effects of drought and dust and improve the quality and yield of camelina in arid and semi-arid regions.
Methods: A factorial experiment was conducted in a randomized complete blocks design with different treatments in farm conditions. The treatments included: plant growth-promoting bacteria (in three levels, control, and inoculation with B. amyloliquefaciens and B. halotolerans), two irrigation levels (irrigation periods of 4 and 8 days), and the two dust levels (without dust and with dust application). To prepare dust, soil samples were collected from critical dust hotspots in Isfahan province, Aran, and Bidgol counties. Supercritical fluid extraction was used to extract the plant oil.
Results: The results showed that low irrigation and dust significantly reduced seed weight, dry weights of shoot and root, and oil content. Additionally, the profile of fatty acids changed under the influence of drought and dust stresses; the amounts of myristoleic acid, alpha-linolenic acid, and eicosatrienoic acid decreased by 33, 21, and 28%, respectively. The results showed that the use of plant growth-promoting bacteria increased some fatty acids such as linoleic, alpha-linolenic, oleic, palmitic and stearic acids and decreased palmitoleic and myristolic acids, and did not cause any change in other fatty acids. In total, the inoculation of the mentioned bacteria reduced the negative effects of stress, allowing for increased growth of roots and aerial organs, maintaining oil content, and improving the ratio of monounsaturated to polyunsaturated fatty acids.
Conclusion: It is recommended to use B. amyloliquefaciens and B. halotolerans as an effective strategy to reduce the negative effects of drought and dust and improve the quality and yield of camelina in arid and semi-arid regions.
Type of Study: Research |
Subject:
Plant growth promoting microrganisms in the rhizosphere
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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.
