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The Effect of Spirulina and Sargassum Seaweed Extracts on Growth and Biochemical Characteristics of Ornamental Violet (Viola ×wittrockiana) Under Salinity Stress in Greenhouse Conditions
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Majid Maleji   , Sepideh Kalateh Jari * , Ali Mohammadi Torkashvand |
| SR.C., Islamic Azad University, Tehran, Iran. |
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Abstract: (21 Views) |
The use of seaweed extracts to mitigate the effects of environmental stresses in plants is of particular importance. This study aimed to investigate the impact of seaweed extracts (Sargassum vulgare and Spirulina platensis) on the growth, physiological, and biochemical characteristics of ornamental violet (Viola ×wittrockiana) under salinity stress. The experiment was conducted as a factorial based on a completely randomized design with three replications. Treatments included salinity stress at three levels (0 (control), 3, and 6 dS/m-1 NaCl) and fertilizer at five levels (control (NPK), 1% and 2% Spirulina liquid extract, and 1% and 2% Sargassum liquid extract). The results showed that salinity stress at 6 dS/m-1 significantly reduced fresh and dry shoot weight, flower number and longevity, and photosynthetic pigments. Salinity stress increased the activity of catalase, peroxidase, superoxide dismutase, malondialdehyde, soluble carbohydrates, and proline, with the 2% Sargassum extract further enhancing these compounds. Among the seaweed extracts, Sargassum had a more pronounced positive effect on all studied traits, with the 2% concentration being the most effective. Overall, the findings indicated that ornamental violet is sensitive to salinity stress, and seaweed extracts - particularly Sargassum - improved growth and metabolic compound production, thereby alleviating the negative effects of salinity stress.
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| Keywords: Catalase, Flower longevity, Proline, Seaweed, Toxicity. |
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Type of Study: Research |
Subject:
Special
Received: 2025/04/4 | Accepted: 2025/11/3 | Published: 2025/12/28
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