Independent and combined effects of region and copper on morphological characteristics, chlorophyll content and phytoremediation of purslane (Portulaca oleracea) (Case study: Askari Raver copper mine pastures)

Subject Areas : Morphophysiological

mansoureh tashakorizadeh ¹ , elham mehrabi gohari ² , narges hatami ³

1 - Forests and Rangelands Research Department, Kerman Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Kerman, Iran.
2 - 2- Assistant Professor, Department of Soil and Water, Kerman Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Kerman, Iran..
3 - 3- Assistant Professor, Research Institute of Forest and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

Received: 2024-08-19 Accepted : 2024-11-01 Published : 2025-04-03

Keywords: Biological transfer, Bio concentration, Dry weight, Medicinal plant,

Abstract :

Remediation of soils contaminated with heavy metals has become one of the major problems in the world. Plant-remediation is one of the most promising breeding methods that has received attention all over the world today. Environmental factors also play a role in the degree of purification of heavy elements by plants and establishment of different types of medicinal species with different capabilities. In the present study, the independent and combined effects of the region (R₁, R₂, R₃ and R₄) and different concentrations of copper element (control, 50, 150, 300 and 400 mg/kg) on length and dry weight, chlorophyll content, the amount of absorption and distribution of copper element, biological transfer factor (TF) and bioaccumulation factor (BAF) in roots and shoots of purslane was tested. Purslane seeds were collected from four regions with concentrations of 50, 150, 300 and 400 mg of copper per kilogram of soil from Askari Raver copper mine in Kerman province and cultivated under greenhouse conditions. The present study showed that the critical level of copper (mg/kg) for reducing morphological traits and chlorophyll content in purslane compared to optimal growth was 300 for R₁ and R₂ regions and 400 for R₃ and R₄ regions. Plants grown from seeds collected from R₃ and R₄ regions were able to tolerate higher levels of copper concentration and showed more morphological traits and chlorophyll content in high copper concentrations. The biological accumulation factor was in the range of 1.6 to 9.41 in the root and in the range of 1.07 to 6.8 in the shoot and the biological transfer factor was in the range of 0.56 to 0.73, which made the results of purslane plant as The title introduces a plant that accumulates and biostabilizes copper metal in the studied area.

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