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Feisibility study on planting Thymus Genotypes as affected by different levels of water deficit stress in the climatic conditions of Sanandaj
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Meysam Yuosefvand   , Mansuor Sarajuoghi * , Khosro Mohammadi , Babk Pasary , Farzad Fayyaz |
| «Karaj islamic azad university |
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Abstract: (412 Views) |
Abstract
Given the shortage of water in the agricultural sector, it is essential to manage water consumption to improve cultivation. One of the important plants whose cultivated area is increasing in Iran is various genotypes of Thymus, with considering qualitative and quantitative performance which is primarily affected by water defecit stress. To investigate the effect of water defecit stress on agronomic and physiological traits of different Thymus genotypes, a split-plot experiment was conducted in a randomized complete block design with three replications at the research farm of Islamic Azad University, Sanandaj Branch, Iran, during the cropping seasons of 2017- as the main factor at five levels, including: 100% of field 2018 and 2018-2019. water defecit stress was investigated capacity or full irrigation (as a control), 80% of field capacity (relatively mild water defict), 60% of field capacity (mild water deficit), 40% of field capacity (relatively severe water deficit) and 20% of field capacity (severe water deficit), and Thymus genotypes was evaluated as sub-factor at four levels, comprising Thymus daenensis, Zataria multiflora, Thymus carmanic and Thymus vulgaris. The results of the statistical analysis indicated that both water defecit stress and differences among genotypes had a significant effect on growth parameters, branch yield, proline accumulation, and thymol content. As water defecit stress increased, plant height, canopy diameter, and branch yield decreased, while the concentrations of essential oil, thymol, carvacrol, proline and soluble sugar increased. Based on the findings, the treatment combination of Thymus vulgaris with moderate water defecit stress (60% of field capacity) with a yield of 1377/11 kg/ ha and 1.34% of essential oil is recommended as a practical approach to optimize Thymus production.
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| Keywords: .Water defecit stress, Thymus, Thymol, Soluble sugars. |
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Full-Text [PDF 578 kb]
(565 Downloads)
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Type of Study: Research |
Subject:
Ecophysiology
Received: 2023/12/20 | Accepted: 2024/03/11 | Published: 2024/11/30
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