Volume 13, Issue 59 (vol. 13, no. 59 2024)                   2024, 13(59): 211-234 | Back to browse issues page

‎ DOI: 10.22034/13.59.211

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The effect of paclobutrazol on some growth and biochemical characteristics of dill (Anethum graveolans L.) plants under drought stress
Razieh Moieni1 , Mehrnaz Mahmoudi Zarandi * 2
1- Department of Biology, Kerman Branch, Islamic Azad University, Kerman, Iran
2- Department of Biology, Kerman Branch, Islamic Azad University, Kerman, Iran , mehromah@yahoo.com
Abstract:   (304 Views)
In this study, the effects of drought stress and paclobutrazol on Anethum graveolans L. were investigated. The experiment was carried out as a factorial based on a completely randomized design with three replications in a greenhouse. Some growth and biochemical characteristics of dill under drought stress (irrigation-based) at three levels (30%, 50% and 70% field capacity) and paclobutrazol at two concentrations (20 and 40 mg/L) were investigated. Drought stress caused a significant reduction in the fresh and dry weight and length of both stem and root, as well as the contents of photosynthetic pigments and proteins, whereas this stress induced reduced sugar and proline content and catalase activity. Although fresh and dry weight and length of stem decreased in plants treated with paclobutrazol, paclobutrazol treatment significantly increased the root growth parameters and the contents of pigments and proteins in relation to drought stress and paclobutrazol treatment. In plants treated with paclobutrazol, the content of sugars, proline and catalase activity were significantly higher compared to non-treated plants and controls (P≤0/05). Moreover, the patterns of protein expression were different. SDS-PAGE analysis revealed a protein with a molecular weight of 11 KD under severe stress conditions and treatment with 40 mg/L paclobutrazol. This protein probably has a major role in dill resistance to drought and the stress amelioration effect of paclobutrazol.
Article number: 13
Keywords: Catalase, Electrophoresis, Photosynthetic pigments, Proline, Protein, Sugar
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Type of Study: Research | Subject: Droughts Stress
Received: 2023/08/15 | Accepted: 2023/10/7 | Published: 2024/04/29
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