Root uptake and shoot accumulation of cadmium by lettuce at various Cd:Zn ratios in nutrient solution

Zare, Ali Akbar; Khoshgoftarmanesh, Amir Hossein; Malakouti, M. J.; Bahrami, H A; Chaney, Rufus L.

doi:10.1016/j.ecoenv.2017.10.045

Cited by 78 publications

(36 citation statements)

References 41 publications

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“…Several studies report that Poaceae species are large phytolith producers [3,15,23,24,26,27]. In addition, phytolith production in plant organs can be influenced by soil element availability [4][5][6][7]. The higher Cd concentration and availability in soil may reflect higher phytolith production, as observed in the present study, especially in grasses cultivated in TQ ( Figure 2).…”

Section: Cadmium Effects On Grass Biomass and Phytolith Productionsupporting

confidence: 63%

“…Based on linear regression coefficients (Figure 1), grasses tolerated more soil Cd when cultivated in Typic Quartzipsamment (TQ) and Xantic Hapludox (XH) soils than when cultivated in Rhodic Hapludox (RH). Higher Cd tolerance of grasses in sandy soils (TQ and RH) indicates that plant-growth capacity in soils with high Cd availability [4][5][6][7] relates to the ability of roots to exclude Cd from tissues, with the ability to chelate metal into a nontoxic compound or to inactivate in nonvital cell compartments [4]. Megathyrsus maximus cv.…”

Section: Cadmium Effects On Grass Biomass and Phytolith Productionmentioning

confidence: 99%

“…The higher Cd concentration and availability in soil may reflect higher phytolith production, as observed in the present study, especially in grasses cultivated in TQ ( Figure 2). Accordingly, sandy soils with low organic matter concentration and pH have higher Cd availability [4,7], and consequently provide higher phytolith production. Grass tolerance may be related to the production of phytoliths, since, regardless of soil type and Cd rate applied, the three evaluated grasses presented potential for phytolith production ( Figure 2).…”

Section: Cadmium Effects On Grass Biomass and Phytolith Productionmentioning

confidence: 99%

“…The higher Cd concentration and availability in soil may reflect higher phytolith production, as observed in the present study, especially in grasses cultivated in TQ ( Figure 2). Accordingly, sandy soils with low organic matter concentration and pH have higher Cd availability [4,7], and consequently provide higher phytolith production. However, Megathyrsus maximus produced the largest amount of phytolith when cultivated in the three soils ( Figure 2), indicating that plant phytolith production depends not only on soil, but also on genetic differences between plant species [5].…”

Section: Cadmium Effects On Grass Biomass and Phytolith Productionmentioning

confidence: 99%

“…The toxicity and high persistence of Cd carry to soil contamination, causing an environmental problem that threatens plant, animal and human health [1,3]. Many studies have been conducted to decrease soil bioavailability of Cd in contaminated areas [4][5][6][7] to increase plant growth and yield for the purpose of safe food production. Cadmium is extremely toxic at concentrations between 5 and 10 mg kg −1 in dry mass for most plants [4,8] and can cause various biochemical, structural and physiological changes [1,2,4,[9][10][11], as well as imbalance of plant nutritional status [8,[12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Potential of Grasses in Phytolith Production in Soils Contaminated with Cadmium

Amaral

Silva

Santos

et al. 2020

Plants

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Cadmium (Cd) is a very toxic heavy metal occurring in places with anthropogenic activities, making it one of the most important environmental pollutants. Phytoremediation plants are used for recovery of metal-contaminated soils by their ability to absorb and tolerate high concentrations of heavy metals. This paper aims to evaluate the potential of grasses in phytolith production in soils contaminated with Cd. The experiments, separated by soil types (Typic Quartzipsamment, Xanthic Hapludox and Rhodic Hapludox), were conducted in a completely randomized design with a distribution of treatments in a 3 × 4 factorial scheme with three replications. The factors were three grasses (Urochloa decumbens, Urochloa brizantha and Megathyrsus maximus) and four concentrations of Cd applied in soils (0, 2, 4 and 12 mg kg−1). Grass growth decreased and increased Cd concentration in shoots of grasses with the increased Cd rates in soils. The toxic effect of Cd resulted in production and Cd occlusion in phytoliths produced in shoots of the grasses. Grasses showed potential for phytolith production, independent of soil type, providing phytoextraction of Cd in phytoliths. Megathyrsus maximus was the grass with the highest tolerance to Cd, evidenced by higher production and Cd capture in phytoliths for the evaluated soils. Phytolith production by grasses in Cd-contaminated soils is related to genetic and physiological differences of the evaluated grasses and Cd availability in soils.

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Section: Cadmium Effects On Grass Biomass and Phytolith Productionsupporting

confidence: 63%

Section: Cadmium Effects On Grass Biomass and Phytolith Productionmentioning

confidence: 99%

Section: Cadmium Effects On Grass Biomass and Phytolith Productionmentioning

confidence: 99%

“…The higher Cd concentration and availability in soil may reflect higher phytolith production, as observed in the present study, especially in grasses cultivated in TQ ( Figure 2). Accordingly, sandy soils with low organic matter concentration and pH have higher Cd availability [4,7], and consequently provide higher phytolith production. However, Megathyrsus maximus produced the largest amount of phytolith when cultivated in the three soils ( Figure 2), indicating that plant phytolith production depends not only on soil, but also on genetic differences between plant species [5].…”

Section: Cadmium Effects On Grass Biomass and Phytolith Productionmentioning

confidence: 99%