Bu- Ali Sina University
Abstract: (276 Views)
Recently, with the rapid growth of industry and agriculture, the contamination of agricultural soils with cadmium and plastic particles has become a serious issue. The simultaneous presence of plastics and cadmium in soil and water can cause various biological effects, especially in the early stages of plant growth. In the current research, the adverse effect of cadmium in the presence of plastic particles was investigated in the early stages of the growth of foxtail millet (Setaria italica L., cv. Bastan). The experiment was arranged in a factorial completely randomized design with three replicates, it was designed to include five concentrations of cadmium 0, 50, 100, 150, and 200 µmol L–1 and polyvinyl chloride plastic 0, 1, 2, 4, and 6%. The studied traits included percentage, inhibition, rate and average time of germination, seedling vigour index, the weight of mobilized seed reserve, seed reserve utilization efficiency, seed reserve depletion percentage, relative seed germination, seedling toxicity level, germination tolerance index and root tolerance index. The results showed that each of the pollutants led to a decrease in germination indexes; however, the presence of polyvinyl chloride (in certain concentrations) in the seed culture medium reduced the toxicity effect of cadmium, alleviated the stress conditions, and improved the desired indicators. So the percentage of germination and the seed reserve utilization efficiency in 200 µmol L–1 cadmium and 1% polyvinyl chloride showed an increase of 43.2% and 206%, respectively compared to 200 µmol L–1 cadmium. The highest percentage of inhibition of germination was related to 200 µmol L–1 cadmium, which was reduced by 52.4% with the use of 1% plastic. Therefore, it seems that low concentrations of polyvinyl chloride particles can reduce the adverse conditions of cadmium stress and improve the conditions for the growth of seedlings by overcoming cadmium toxicity.
Type of Study: Research |
Subject:
Plant growth under stressful conditions
Received: 2023/11/15 | Accepted: 2024/02/4
Received: 2023/11/15 | Accepted: 2024/02/4
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