Transfer of cadmium and barium from soil to crops grown in tropical soils

Abstract

SUMMARYPhytotoxicity and transfer of potentially toxic elements, such as cadmium (Cd) or barium (Ba), depend on the availability of these elements in soils and on the plant species exposed to them. With this study, we aimed to evaluate the effect of Cd and Ba application rates on yields of pea (Pisum sativum L.), sorghum (Sorghum bicolor L.), soybean (Glycine max L.), and maize (Zea mays L.) grown under greenhouse conditions in an Oxisol and an Entisol with contrasting physical and chemical properties, and to correlate the amount taken up by plants with extractants commonly used in routine soil analysis, along with transfer coefficients (Bioconcentration Factor and Transfer Factor) in different parts of the plants. Plants were harvested at flowering stage and measured for yield and Cd or Ba concentrations in leaves, stems, and roots. The amount of Cd accumulated in the plants was satisfactorily evaluated by both DTPA and Mehlich-3 (M-3). Mehlich-3 did not relate to Ba accumulated in plants, suggesting it should not be used to predict Ba availability. The transfer coefficients were specific to soils and plants and are therefore not recommended for direct use in risk assessment models without taking soil properties and group of plants into account.Index terms: soil pollution, transfer factor, bioconcentration factor. RESUMO: TRANSFERÊNCIA DE CÁDMIO E BÁRIO EM PLANTAS CULTIVADAS EM SOLOS TROPICAIS

Photosynthetic parameters and growth of rice, lettuce, sunflower and tomato in an Entisol as affected by soil acidity and bioaccumulation of Ba, Cd, Cu, Ni and Zn

“…Therefore, physiological mechanisms control TEs translocation from roots to shoot, although there is still a great in uence of highest TEs bioavailability on their shoot accumulation due to the higher TEs uptake in this scenario. To exemplify, Melo et al (2014) mentioned that there was a positive correlation of Ba and Cd bioavailability with Ba BCF roots , Ba BCF shoot , Cd BCF roots and Cd BCF shoot in different crops, but there was no correlation of TEs bioavailability with Ba TF and Cd TF.…”

Bioaugmentation-assisted phytoremediation of As, Cd, and Pb using Sorghum bicolor in a contaminated soil of an abandoned gold ore processing plant

“…Therefore, bacteria inoculums changed the Cd translocation rate to shoots. In general, Cd accumulation in the roots is much higher than in shoots (El-Beltagi et al, 2010;Izadiyar and Yargholi, 2010;Melo et al, 2014;Soudek et al, 2014), which can be a drawback for efficient phytoextraction. Thus, the use of microorganisms capable of stimulating Cd translocation to the aerial part of plants aids in phytoextraction's feasibility.…”

Photosynthetic response of cabbage in cadmium-spiked soil

“…Kusznierewicz et al (2012) claimed that since plants of the early cultivar may be planted twice per agricultural season, the phytoremediation results may be similar to those of the late cultivar, even though such a solution would be more cost-and labor-consuming. Metal uptake may depend on soil composition and pH (McBride 1989, Melo et al 2014, Bernard et al 2018; hence, implementation of proper agricultural treatments (such as intense fertilization of the late cultivars) is necessary. An environmental issue should be also considered, namely potential transfer of Cd from the spiked plants into small herbivores leading to further release of Cd to the trophic chain (Hladun et al 2015).…”