Cadmium stress in paddy fields: Effects of soil conditions and remediation strategies

Hussain, Babar; Ashraf, Muhammad; Rahman, Shafeeq Ur; Abbas, Aqleem; Li, Jumei; Farooq, Muhammad

doi:10.1016/j.scitotenv.2020.142188

Cited by 287 publications

(86 citation statements)

References 203 publications

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“…These results were in line with previous conclusions where enzymatic antioxidants were upregulated under various abiotic stresses, including heavy metal stress [ 25 ]. Plants can only survive under various oxidative stresses if SOD contents were regulated normally [ 22 ]. Generally, SOD enzymes reduced superoxide anions (O 2 - ) into oxygen (O 2 ) and hydrogen peroxide (H 2 O 2 ) molecules.…”

Section: Discussionmentioning

confidence: 99%

“…One of the primary sources of Cd intake for humans is considered wheat consumption, which can create serious health risks. Many researchers have studied the adverse effects of Cd and other heavy metals, but they mostly focused on the biological mechanisms and risk assessment of toxicity [ 21 , 22 ]. Once Cd enters into the human body through eating plants grown in Cd-contaminated soils, it causes acute toxicity in the kidney’s proximal tubular cells, which are responsible for Cd deposition [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

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The interactive effect of pH variation and cadmium stress on wheat (Triticum aestivum L.) growth, physiological and biochemical parameters

Rahman

Riaz

et al. 2021

PLoS ONE

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Anthropogenic activities such as mining, manufacturing, and application of fertilizers release substantial quantities of cadmium (Cd) into the environment. In the natural environment, varying pH may play an important role in the absorption and accumulation of Cd in plants, which can cause toxicity and increase the risk to humans. We conducted a hydroponic experiment to examine the impact of pH on cadmium (Cd) solubility and bioavailability in winter wheat (Triticum aestivum L.) under controlled environmental conditions. The results showed that Cd concentration was significantly reduced in wheat with an increase in pH from 5 to 7, while it was dramatically increased at pH ranging from 7 to 9. However, in both cases, a significant reduction in physiological traits was observed. The addition of Cd (20, 50, and 200 μmol L-1) at all pH levels caused a substantial decline in wheat growth, chlorophyll and carotenoids contents, nutrient availability, while elevated cell membrane damage was observed in terms of electrolytic leakage (EL), osmoprotectants, and antioxidants activity. In our findings, the negative effects of acidic pH (5) on wheat growth and development were more pronounced in the presence of Cd toxicities. For instance, Cd concentration with 20, 50, and 200 μmol L-1 at acidic pH (5) reduced shoot dry biomass by 45%, 53%, and 79%, total chlorophyll contents by 26%, 41%, 56% while increased CAT activity in shoot by 109%, 175%, and 221%, SOD activity in shoot by 122%, 135%, and 167%, POD activity in shoot by 137%, 250%, and 265%, MDA contents in shoot by 51%, 83%, and 150%, H2O2 contents in shoot by 175%, 219%, and 292%, EL in shoot by 108%, 165%, and 230%, proline contents in shoot by 235%, 280%, and 393%, respectively as compared to neutral pH without Cd toxicities. On the other hand, neutral pH with Cd toxicities alleviated the negative effects of Cd toxicity on wheat plants by limiting Cd uptake, reduced reactive oxygen species (ROS) formation, and increased nutrient availability. In conclusion, neutral pH minimized the adverse effects of Cd stress by minimizing its uptake and accumulation in wheat plants.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The interactive effect of pH variation and cadmium stress on wheat (Triticum aestivum L.) growth, physiological and biochemical parameters

Rahman

Riaz

et al. 2021

PLoS ONE

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“…Apart from the rice cultivar, the paddy soil type in terms of pH is also a crucial soil property influencing the bioaccumulation of Cd from soil to rice plant (Zhao et al, 2010;Ye et al, 2012). Generally, Cd accumulation in rice grain is significantly and negatively correlated with soil pH (Honma et al, 2016;Gu et al, 2018;Hussain et al, 2021a). The movement and bioaccumulation of Cd promoted the decrease in soil pH because protonation increased at low soil pH led to reducing the negative charge on the soil surface (Rajkumar et al, 2012;Gu et al, 2018;Zhao and Wang, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The movement and bioaccumulation of Cd promoted the decrease in soil pH because protonation increased at low soil pH led to reducing the negative charge on the soil surface (Rajkumar et al, 2012;Gu et al, 2018;Zhao and Wang, 2020). In this case, Cd solubility and phytoaccumulation are enhanced via the transformation of Cd from stable fractions (Fe-Mn oxide bound and carbonate structures) to easily exchangeable fractions (mobile and bioavailable structures) (Li et al, 2017;Hussain et al, 2021a;Hussain et al, 2021b). With the increase in soil pH, the solubility and distribution of Cd decreased via increasing the complexation by adsorptive sites on the soil surfaces (Wang et al, 2019;Hussain et al, 2021a).…”

Section: Introductionmentioning

confidence: 99%

Response of Iron and Cadmium on Yield and Yield Components of Rice and Translocation in Grain: Health Risk Estimation

Siddique

Rahman

Islam

et al. 2021

Front. Environ. Sci.

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Rice consumption is a major dietary source of Cd and poses a potential threat to human health. The aims of this study were to examine the influence of Fe and Cd application on yield and yield components, dynamics of Cd in pore water, translocation factors, daily dietary intake, and estimation of human health risks. A pot experiment was performed under glasshouse conditions where rice cultivars (Langi and Quest) were cultivated in two dissimilar soils under different levels of Cd (0, 1.0, and 3.0 mg kg−1) and Fe (0, 1.0, and 2.0 g kg−1). The results showed that variation in two rice cultivars in terms of yield and yield-related components was dose dependent. Cadmium concentration in soil pore water was decreased over time and increased with increasing Cd levels but decreased with Fe application. Translocation factors (TFs) from root to straw (TFroot-straw) or straw to husk (TFstraw-husk) were higher than root to grain (TFroot-grain) or straw to grain (TFstraw-grain). The Quest cultivar had 20% lower Cd than the Langi cultivar. Application of Fe at the rate of 1 and 2 g kg−1 soil reduced Cd by 23 and 46%, respectively. Average daily intake (ADI) of Cd exceeded the permissible limit (5.8 × 10−3 mg −1 kg−1 bw per week) when rice plant subjected 1 and 3 mg kg−1 Cd stress with or without Fe application. Results also indicated that ADI value was lower in the Quest cultivar as compared to the Langi cultivar. Estimation of human health risk revealed that the non-carcinogenic risks (HQ > 1) and carcinogenic risks (CR > 1.0 × 10−4) increased with increasing Cd levels in the soil. The application of Fe decreased the human health risks from rice consumption which is more pronounced in Fe 2.0 than in Fe1.0 treatments. The rice cultivar grown in soil-1 (pH 4.6) showed the highest health risks as compared to soil-2 (pH 6.6) and the Quest cultivar had lower health risks than the Langi cultivar.

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“…Excessive amounts of Cd frequently elicits many stress symptoms in plants, such as decrease of carbon assimilation, generation of oxidative stress, inhibition of chlorophyll synthesis, reduction in nutrient uptake, impairment of photosynthesis and at last bringing about stunted growth, chlorosis, leaf epinasty, alterations in chloroplast ultrastructure, induction of lipid peroxidation, alterations in nitrogen (N) metabolism and interruption of antioxidant machinery (Shah et al 2017;Farooq et al 2020). It is well known that Cd is more easily absorbed by plants than any other heavy metals and more than 90% of the Cd is accumulated in roots (Hussain et al 2021). Although most studies had focused on the impact of heavy metals on visible symptoms on aerial parts and root morphological characters, few studies had recorded toxic symptoms on the anatomical parameters of several plants grown under cadmium stress including maize (Gowayed and Almaghrabi 2013) and rice (Li et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Biofertilizer Alleviates the Inhibitory Effect of Cadmium on Physiology and Nitrogen Assimilation in Maize Plants

Abou-Zeid¹

2021

IJAB

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The present study investigated the role of inoculation with Nitrobien biofertilizer (N-Bio, Azospirillum and azotobacter spp.) on the response of maize plants to cadmium-toxicity (applied as 2 and 10 mM CdSO4). Cd-stress caused a significant reduction in the fresh and dry biomass of leaves and roots as well as a marked disturbance in the anatomical features of roots and stomatal structure and behavior. Cd-stress significantly depressed the total photosynthetic pigments, photochemical efficiency of PS II, total carbohydrates, and proteins content. Furthermore, increasing Cd level prompted oxidative stress measured in terms of malondialdehyde and H2O2 contents in maize plants. Application of N-Bio improved these attributes in Cd-stressed maize plants. Moreover, NO3- uptake and its assimilating enzymes (nitrate reductase, NR; glutamine synthase, GS; and, glutamate dehydrogenase GDH) were significantly increased in N-Bio-pretreated Cd-stressed plants than Cd- stressed ones and that was associated with a decrease of NH4+ content. N-Bio pretreatment also stimulated the accumulation of amino acids and markedly increased endogenous phytohormone content (IAA, GA3) of Cd-stressed maize plants. These results revealed the potentiating effect of N-Bio pretreatment in regulating Cd-induced damages in maize plants. © 2021 Friends Science Publishers

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Cadmium stress in paddy fields: Effects of soil conditions and remediation strategies

Cited by 287 publications

References 203 publications

The interactive effect of pH variation and cadmium stress on wheat (Triticum aestivum L.) growth, physiological and biochemical parameters

The interactive effect of pH variation and cadmium stress on wheat (Triticum aestivum L.) growth, physiological and biochemical parameters

Response of Iron and Cadmium on Yield and Yield Components of Rice and Translocation in Grain: Health Risk Estimation

Nitrogen Biofertilizer Alleviates the Inhibitory Effect of Cadmium on Physiology and Nitrogen Assimilation in Maize Plants

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