Investigation of the effect of silica spraying and salinity stress on some physiological traits of Camelina sativa oil plant

Subject Areas : Tension

Ebrahim  Fani ¹ (Department of Biology, Faculty of Basic Sciences, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran)
Shokoofeh  Hajihashemi ² (Department of Biology. Faculty of Basic Sciences. Behbahan Khatam Alanbia University of Technology.Behbahan, Iran)

Received: 2022-03-04 Accepted : 2022-05-14 Published : 2023-03-21

Keywords: chlorophyll a, Chlorophyll b, Antioxidant capacity, Soluble protein, soluble sugar,

Abstract :

In order to investigate the effects of salinity stress and foliar application of silica on Camelina sativa oil plant, a factorial study was carried out in the growth chamber of the laboratory of the Department of Biology, Behbahan Khatam Alanbia University of Technology, in 3 replications based on a completely randomized block design. Treatments included salinity stress at two levels (0 and 100 mM NaCl) and potassium silicate solution at two levels (0 and 5 mM). The physiological and biochemical traits of Camelina sativa under salinity stress were evaluated along with the role of osmotic substances such as soluble sugar and soluble protein in reducing the harmful effects of salinity stress. Results showed that salinity stress significantly reduced the amount of chlorophyll a, b, and total in Camelina sativa, while silica treatment significantly reduced the harmful effects of salinity. Soluble sugar content of leaves in response to salinity stress was 46% lower than in the control plant. Salinity stress combined with silica increased the amount of soluble sugar 27% more than the control plant. Results also showed that in the treatment with silica under 100 mM salinity level, the amount of leaf proteins was almost 10% less than the control plants. The results of measuring the plant’s antioxidant capacity of FRAP showed that in response to silica treatment without salinity, no significant difference was observed in the amount of antioxidant capacity of FRAP, while in the combined treatment of salinity stress + silica it decreased by 9% compared with the control plants. The results of this study supports the beneficial role of silica as an environmentally friendly compound to increase plant resistance to salinity stress.

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