Volume 14, Issue 65 (vol. 14, no. 65 2025)
2025, 14(65): 277-294 |
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Saadat H, Sedghi M. Effect of priming using different combinations on germination indicators and antioxidant enzyme activity in Marigold seedling (Calendula officinalis) under salinity stress. Plant Process and Function 2025; 14 (65) : 17
URL: http://jispp.iut.ac.ir/article-1-2055-en.html
URL: http://jispp.iut.ac.ir/article-1-2055-en.html
1- Crop Ecology, University of Mohaghegh Ardabili, Faculty of Agriculture and Natural Resources, Ardabil, Iran
2- Department of Plant Production and Genetics, Faculty of Agriculture and Natural resources, University of Mohaghegh Ardabili, Ardabil, Iran ,m_sedghi@uma.ac.ir
2- Department of Plant Production and Genetics, Faculty of Agriculture and Natural resources, University of Mohaghegh Ardabili, Ardabil, Iran ,
Abstract: (78 Views)
In order to investigate the effect of priming on germination indicators and antioxidant enzyme activity in Marigold under salinity stress, a factorial experiment was conducted based on a completely randomized design with 3 replications. Treatments were accelerated at four salinity levels (0, 50, 100, and 150 mM) and four priming levels (control (distilled water), priming with salicylic acid (100 mg/L), gibberellin (20 mg/L) and chitosan (0.8% weight volume, all of which had been dissolved in 1% acetic acid). The results showed that the germination percentage (GP), seedling length (SL), Allometric Coefficient (CA) and Seedling weight vigor index (SWVI) decreased by 21, 37, 17 and 43% respectively compared to the salinity control, but priming with salicylic acid, gibberellin especially chitosan improved these traits. The lowest Daily Germination Speed (DGS) in priming with salicylic acid and gibberellin, especially priming with chitosan, and Mean Germination Time (MGT) were obtained in priming with chitosan and without salinity. The Germination rate (GR) and Seedling length vigor index (SLVI) in chitosan treatment and non-salinity compared to the control and 150 mM salinity showed an increase respectively about 75% and 73%. The catalase (CAT) and superoxide dismutase (SOD) enzymes activity in priming with chitosan compared to the control (distilled water) showed an increase respectively of about 18% and 15%. Also, peroxidase (POX) enzyme activity in priming with chitosan and salinity of 150 mM was about 32% higher than the control (distilled water) and salinity of 50 mM. The results showed that seed treatment with salicylic acid, gibberellin, especially chitosan by stimulating antioxidant enzymes and neutralizing free radicals can reduce the harmful effects of salinity stress on some traits in Marigold seedling and improve seedling growth. Therefore, since pot marigold seeds are generally weak and have low germination power, the application of 0.8% chitosan is a suitable option for improving germination and seedling growth of this plant.
Article number: 17
Type of Study: Research |
Subject:
Salt Stress
Received: 2024/04/9 | Accepted: 2024/10/15 | Published: 2025/05/3
Received: 2024/04/9 | Accepted: 2024/10/15 | Published: 2025/05/3
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