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Effects of seaweed extract on the growth and biochemical characteristics of scented-leaved geranium (Pelargonium graveolens) under salinity stress conditions
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Seyedeh Shaghayegh Nabavi   , Marzieh Ghanbari jahromi * , Seyed Najmmaddin Mortazavi |
| Department of Horticultural Sciences and Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran |
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Abstract: (554 Views) |
The use of biofertilizers is of particular importance in mitigating the effects of environmental stresses on plants. The present study was conducted to investigate the effect of seaweed extract on the growth, physiological, and biochemical characteristics of scented geranium (Pelargonium graveolens L.) under salt stress. Salt stress was applied at three levels (0, 60, and 120 mM) in combination with seaweed extract (0, 0.5, 1, and 2 g/L) in a factorial arrangement based on a completely randomized design with three replications. The results showed that salt stress at 120 mM significantly reduced the morphological traits of the plant (fresh and dry weight of aerial parts and roots) and the levels of photosynthetic pigments (chlorophyll a, b, and total). The application of seaweed extract alleviated the effects of salt stress on scented geranium. Under 120 mM salt stress and without seaweed extract, the highest levels of soluble carbohydrates (36.69%) and proline (37.63%) were observed compared to the control. Overall, the results indicated that scented geranium exhibited greater tolerance to mild salt stress compared to severe salt stress, and seaweed extract played a significant role in mitigating the negative effects of salt stress by enhancing growth and the production of metabolic compounds in scented geranium. |
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| Keywords: Biostimulant, Dry weight, Environmental stress, Proline |
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Full-Text [PDF 422 kb]
(90 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2024/02/3 | Accepted: 2024/11/15 | Published: 2025/03/2
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