Leila Tabrizi; Siavash Mohammadi; Mojtaba Delshad; Babak Moteshare Zadeh
Volume 13, Issue 2 , July 2015, , Pages 37-48
Abstract
Rosemary (Rosmarinus officinalis L., Lamiaceae) is a perennial medicinal plant used in pharmaceutical, cosmetic, food, and beverage industries. In order to study growth and yield of this plant in symbiosis with arbuscular mycorrhizal fungi under Pb and Cd stress, a twofactored pot experiment was carried ...
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Rosemary (Rosmarinus officinalis L., Lamiaceae) is a perennial medicinal plant used in pharmaceutical, cosmetic, food, and beverage industries. In order to study growth and yield of this plant in symbiosis with arbuscular mycorrhizal fungi under Pb and Cd stress, a twofactored pot experiment was carried out based on a randomized complete block design with 4 replications in greenhouse of Department of Horticultural Sciences, University of Tehran, Karaj, Iran in 2011- 2012. The first factor was arbuscular mycorrhiza (inoculation and noninoculation), and the second factor was heavy metal contamination as listed here per mg/kg of soil: Without contamination, Pb 150, Pb 300, Cd 40, and Cd 80. The parameters plant height, number of lateral branches per plant, length of lateral stem, number of leaves, leaf area, crown diameter, shoot fresh and dry weights, leaf dry weight, leaf dry weight/shoot dry weight ratio, and essential oil content and yield were measured. The results showed that growth and yield of rosemary diminished with increasing concentration of the heavy metals in the medium; however, mycorrhizal inoculation donated a tolerance to the heavy metal stress, thereby improving growth and yield of rosemary in such a stressful situation. The highest fresh and dry weights were observed in mycorrhizal plants grown in non-pollution medium, whereas non-mycorrhizal plants grown under Cd 80 had the worst values, which were decreased respectively by 57.6% and 79.5% as compared to those of mycorrhizal plants grown on non-polluted medium. Moreover, the highest content of essential oil was recorded in non-mycorrhizal plants grown under Pb 300; nevertheless, the highest essential oil yield was found in mycorrhizal plants grown on noncontaminated medium.
Mansoureh Karimi,; Gholamreza Savghebe; Babak Motesharezadeh
Volume 9, Issue 4 , July 2012
Abstract
ntensive agriculture and industrial activities in several parts of Iran have reduced soil quality. This research was conducted to investigate the effect of organic and mineral amendments on polluted soil around the Angouran zinc and lead mines. The experimental treatments included two organic treatments: ...
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ntensive agriculture and industrial activities in several parts of Iran have reduced soil quality. This research was conducted to investigate the effect of organic and mineral amendments on polluted soil around the Angouran zinc and lead mines. The experimental treatments included two organic treatments: bagasse and rice husk at three levels, namely 1.25%, 2.5% and 5%, and three minerals treatments as follows: zeolite in three levels (5%, 10% and 15%); phosphate rock at three rates (1%, 3% and 5%); and triple superphosphate in three ratios (0.0075%, 0.015% and 0.3%) accompanied with the control treatment. After three months incubation, the heavy metal (lead, zinc, iron, manganese) concentrations were measured. After that, garden cress was planted in pots and, after completing its vegetative period and harvesting it, heavy metals in the garden cress shoots were measured. The results of data Analysis of Variance (ANOVA) showed that the treatments had a significant effect on the reduction of heavy metal concentration in the soil and in garden cress shoots. The least lead concentration (28.17 mg kg⁻¹) was observed in the first level of rice husk and the highest reduction percentage of zinc concentration (34%) in garden cress shoots was found in the second level of rice husk. According to the effect of organic treatments on heavy metals fixation in soil and reduction of plant uptake, usage of organic matter in polluted soils can be a useful way to control the transfer of pollutants.
