Effect of scale of Cd heterogeneity and timing of exposure on the Cd uptake and shoot biomass, of plants with a contrasting root morphology

Manciulea, Adriana

doi:10.1016/j.scitotenv.2006.01.015

Cited by 14 publications

(13 citation statements)

References 43 publications

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“…Plants are thus the main entry route of Cd into the food chain. The most common symptoms of Cd toxicity are stunted growth, wilting, and leaf chlorosis (Manciulea & Ramsey, 2006). A major problem of Cd as compared to other metal pollutants is that it may pose risks to human health at plant tissue concentrations below the phytotoxic level (Peijnenburg et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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

Melo

Silva

Alleoni

2014

Rev. Bras. Ciênc. Solo

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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

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Section: Introductionmentioning

confidence: 99%

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

Melo

Silva

Alleoni

2014

Rev. Bras. Ciênc. Solo

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“…The spatial pattern of contaminants in soil in which a plant is growing determines plant growth and contaminant uptake [12][13][14], and has been shown to have significant impact on the potential for crops to exceed contaminant safety limits or to be effective in phytoremediation projects. However, this has typically been established using simple binary models of heterogeneity and comparing such situations to homogeneous controls.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies [12,13,28,29,14] have shown that the pattern and scale of Zn and Cd heterogeneity can have a significant effect on plant performance and uptake.…”

Section: Introductionmentioning

confidence: 99%

“…A major drawback of previous works on plant uptake is that spatial heterogeneity in contaminants distribution is overlooked. Studies using Zn and Cd [12][13][14] have shown significant differences between the checkerboard models used and homogeneous media, but these models are not characteristic of the original spatial patterns of contaminant heterogeneity experienced by plants in realistic field conditions. [14] showed that Zn heterogeneity seen in the field can be simulated in pot trials to assess its effect on plant uptake.…”

Section: Introductionmentioning

confidence: 99%

“…Earlier work by [14] with zinc heterogeneity also used the 0.02 m scale that can be replicated within a pot trial. Similarly, [13] used a scale of 0.03 m with the simplistic chequer board models and showed that changes in heterogeneity of Cd can have a significant effect (+76%) on plant uptake.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Effects of More Realistic Forms of Lead Heterogeneity in Soil on Uptake, Biomass and Root Response of Two Brassica species

Solomon-Wisdom

John

2015

AIR

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New insights about cadmium impacts on tomato: Plant acclimation, nutritional changes, fruit quality and yield

Carvalho

Piotto

Gaziola

et al. 2018

Food and Energy Security

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Tomato is an important crop worldwide. Cadmium (Cd) concentrations in fruits depend on tomato genotype. This work aimed to study the relation among Cd accumulation, tolerance mechanisms, and fruit features in two tomato cultivars with contrasting tolerance to Cd stress. Tolerant (Yoshimatsu) and sensitive (Tropic Two Orders) plants were grown in control and contaminated soils (0.04 and 3.77 mg/kg Cd, respectively) from the seedling stage to fruit production. Both cultivars were able to acclimatize to Cd exposure, probably through mechanisms associated with reductions in the magnesium status. Cadmium concentrations varied according to the following descending order: roots = leaf blades > (peduncle + sepals) > stem = fruits.However, the tolerant cultivar accumulated more Cd than did the sensitive one.Although Cd reached the fruits from the first to the fourth bunches, peduncle and sepals may act as a barrier to Cd entrance in tomato pulp and peel. The Cd-induced changes in the fruit mineral profile varied according to plant cultivar, organ, tomato tissue, and bunch position. Moreover, plant yield was not affected by the Cd stress, which was able to improve fruit size and weight in the tolerant cultivar. In conclusion, new insights about the Cd-induced effects on tomato development and fruit attributes were provided by growing plants in soil, which is the media generally used to cultivate this crop, rather than hydroponics. It was shown that tomato cultivars with contrasting tolerance to Cd toxicity can reach sexual maturity and produce fruits with no yield losses, despite impacts on development from long-term Cd exposure.This study also revealed the role of floral receptacle and its related structures in limiting, even partially, Cd translocation to the fruits. Furthermore, Yoshimatsu's capacity to produce bigger and heavier fruits, in plants under Cd exposure, may probably be associated with enhanced Cd accumulation. K E Y W O R D Scadmium, environmental contamination, food security, heavy metals, Solanum lycopersicum

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Effect of scale of Cd heterogeneity and timing of exposure on the Cd uptake and shoot biomass, of plants with a contrasting root morphology

Cited by 14 publications

References 43 publications

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

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

The Effects of More Realistic Forms of Lead Heterogeneity in Soil on Uptake, Biomass and Root Response of Two Brassica species

New insights about cadmium impacts on tomato: Plant acclimation, nutritional changes, fruit quality and yield

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