a Ecole Nationale Polytechnique , El Harrach , Algeria.
c Laboratoire de Chimie Organique et des Substances Naturelles , Université Ziane Achour , Djelfa , Algeria.
Int J Phytoremediation. 2019;21(3):224-229. doi: 10.1080/15226514.2018.1524841. Epub 2019 Jan 18.
The aim of this work is to study and evaluate in situ, the Artemisia herba alba responses to hexavalent chromium stress in the arid and semi-arid steppe Algerian soil. This metallic pollutant was selected to its high toxicity and to its great release from several industrial and agricultural activities emissions in the area of the study region. Artemisia herba alba is a medicinal plant but also a forage species widely used in pasture. It has dominated then adapted to the arid and semi-arid climate of Algerian steppe region, due principally to their morphological and physiological characteristics. To establish this work, A. herba alba species were selected in the Algerian steppe region, and their soils were treated weekly with KCrO solution for about three months. Chromium concentrations were determined in the soil and in the different plants' parts to verify its absorption and translocation with and without pollution simulation. This study demonstrated that A. herba alba has a strong resistance to high concentrations of hexavalent chromium. An increase in chromium concentrations at the different parts of plant's has been noticed, without affecting its growth and vegetative development. The results of physiological and elementary analysis indicated that chromium was absorbed by A. herba alba. Cr (VI) accumulation in plant increase when they are increasing in soil. Translocation factor results indicated that Cr (VI) was mainly accumulated by A. herba alba roots. Particle size analysis showed that the soil is poor in organic substances and mostly sandy loams with 79.77% of sand and 9.76% of clay minerals.
本研究旨在原位研究和评估阿尔及利亚干旱半干旱草原土壤中黄花蒿对六价铬胁迫的响应。选择这种金属污染物是因为其高毒性以及该地区工业和农业活动排放的大量污染物。黄花蒿既是一种药用植物，也是一种广泛用于牧场的饲料物种。它之所以能够在阿尔及利亚草原地区的干旱和半干旱气候中占据主导地位并适应这种气候，主要是因为其形态和生理特征。为了开展这项研究，在阿尔及利亚草原地区选择了黄花蒿物种，并在大约三个月的时间里每周用 KCrO 溶液处理它们的土壤。测定了土壤和不同植物部位的铬浓度，以验证在有和没有污染模拟的情况下，其对铬的吸收和转运情况。研究表明，黄花蒿对高浓度六价铬具有很强的抵抗力。在植物的不同部位发现铬浓度增加，但这并未影响其生长和营养发育。生理和元素分析结果表明，铬被黄花蒿吸收。随着土壤中铬含量的增加，植物体内的 Cr(VI)积累也会增加。转运因子的结果表明，Cr(VI)主要被黄花蒿的根部积累。颗粒大小分析表明，土壤中有机质含量低，主要为砂壤土，其中砂粒占 79.77%，粘土矿物占 9.76%。
