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Effect of soil dust on photosynthesis, gas exchange, and the competitive ability of wild barley versus wheat
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Akbar Aliverdi *   , Samira Karami |
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Abstract: (3 Views) |
To investigate the competition between wheat and wild barley under dusty conditions, a greenhouse experiment was conducted as a factorial experiment in a completely randomized design in 2023 at Bu-Ali Sina University. The experimental factors included plant species (wild barley and wheat cv. Alvand and Pishgam), wheat:wild barley cropping ratios (8:0, 7:1, 6:2, 5:3, 4:4, 3:5, 2:6, 1:7, and 0:8), and dust concentration (0, 1500, 3000, and 6000 mg/m3). Using 3000 mg/m3 soil dust did not affect wild barley, but it reduced the dry weight of wheat cv. Alvand and Pishgam by 19 and 28%, respectively, and the net photosynthesis rate (19%), transpiration rate (59%), intercellular carbon dioxide concentration (13%), and stomatal conductance (27%) in wheat cv. Pishgam. These traits were significantly reduced in all three species by applying 6000 mg/m3 soil dust. Without soil dust, the competitive ability of wild barley versus wheat cultivars was equal. Although 1500 mg/m3 soil dust was not stressful on the species, it increased the aggressivity index of wild barley versus wheat cultivars, indicating an increased competitive ability of wild barley against them. In all levels of soil dust, the aggressivity index of wild barley versus wheat cv. Pishgam was higher than wheat cv. Alvand. Therefore, the increase in the occurrence of soil dust phenomenon could be one of the reasons for the outbreak of wild barley in wheat fields.
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| Keywords: stress, replacement series, aggressivity index and weed. |
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Full-Text [PDF 952 kb]
(3 Downloads)
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Type of Study: Research |
Subject:
Ecophysiology
Received: 2025/12/7 | Accepted: 2026/03/4 | Published: 2026/03/4
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