Silicon decreases cadmium concentrations by modulating root endodermal suberin development in wheat plants

Wu, Jiawen; Mock, Hans‐Peter; Giehl, Ricardo Fabiano Hettwer; Pitann, Britta; Mühling, Karl H.

doi:10.1016/j.jhazmat.2018.10.052

Cited by 132 publications

(43 citation statements)

References 39 publications

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“…In the current study, Cd-stressed rice plants displayed phenotypic changes, including decreased growth, leaf rolling, burning of leaf tips, chlorosis, and yellowing of the entire plant (Figure 1A), suggesting that the presence of excessive Cd can induce toxicity effects on hydroponically grown rice plants. The decrease in biomass of Cd-stressed rice plants (Figure 1B) was also detected in other plant species (e.g., wheat, mustard, Brassica oleracea, and Pisum sativum ) exposed to various levels of Cd for short or long periods [13,31,32,33]. In contrast, addition of exogenous salicylic acid (SA) and/or sodium nitroprusside (SNP) to growth medium was found to mitigate Cd-induced phytotoxic effects by restoring plant growth and biomass (Figure 1B), reviving green color, reducing leaf rolling, and improving the overall phenotypic appearance (Figure 1A).…”

Section: Discussionmentioning

confidence: 53%

“…Hyperaccumulators, which are commonly used for phytoremediation can accumulate a large amount of toxic metals like Cd in their tissues without showing visible toxicity symptoms [35]. Unlike hyperaccumulators, the growth performance of other plant species is linked to their resistance to Cd uptake and accumulation in different parts of the plants [8,32,33]. The present study showed that root- and leaf-Cd contents in Cd-stressed rice plants followed differential patterns with root tissues accumulating much higher amount of Cd (Figure 1C,D).…”

Section: Discussionmentioning

confidence: 99%

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Interactive Effects of Salicylic Acid and Nitric Oxide in Enhancing Rice Tolerance to Cadmium Stress

Mostofa

Rahman

Ansary

et al. 2019

IJMS

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Cadmium (Cd) is one of the prominent environmental hazards, affecting plant productivity and posing human health risks worldwide. Although salicylic acid (SA) and nitric oxide (NO) are known to have stress mitigating roles, little was explored on how they work together against Cd-toxicity in rice. This study evaluated the individual and combined effects of SA and sodium nitroprusside (SNP), a precursor of NO, on Cd-stress tolerance in rice. Results revealed that Cd at toxic concentrations caused rice biomass reduction, which was linked to enhanced accumulation of Cd in roots and leaves, reduced photosynthetic pigment contents, and decreased leaf water status. Cd also potentiated its phytotoxicity by triggering reactive oxygen species (ROS) generation and depleting several non-enzymatic and enzymatic components in rice leaves. In contrast, SA and/or SNP supplementation with Cd resulted in growth recovery, as evidenced by greater biomass content, improved leaf water content, and protection of photosynthetic pigments. These signaling molecules were particularly effective in restricting Cd uptake and accumulation, with the highest effect being observed in “SA + SNP + Cd” plants. SA and/or SNP alleviated Cd-induced oxidative damage by reducing ROS accumulation and malondialdehyde production through the maintenance of ascorbate and glutathione levels, and redox status, as well as the better activities of antioxidant enzymes superoxide dismutase, catalase, glutathione S-transferase, and monodehydroascorbate reductase. Combined effects of SA and SNP were observed to be more prominent in Cd-stress mitigation than the individual effects of SA followed by that of SNP, suggesting that SA and NO in combination more efficiently boosted physiological and biochemical responses to alleviate Cd-toxicity than either SA or NO alone. This finding signifies a cooperative action of SA and NO in mitigating Cd-induced adverse effects in rice, and perhaps in other crop plants.

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Section: Discussionmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Interactive Effects of Salicylic Acid and Nitric Oxide in Enhancing Rice Tolerance to Cadmium Stress

Mostofa

Rahman

Ansary

et al. 2019

IJMS

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“…Interestingly, foliar application of ascorbic acid also alleviated the detrimental effects of drought stress in maize plants by improving their antioxidative defense system (Noman et al, 2015). Since Si can also attenuate the toxic effects of heavy metals such as Cd (Lu et al, 2018;Wu et al, 2018) as well as drought and salt stress (Rizwan et al, 2015) in plants, these approaches using biochar, P and ascorbic acid could also be employed to mitigate the detrimental effects of these and other stresses in plants in combination with Si.…”

Section: Discussion Si Stimulates Growth Of Pepper Plants In a Hormetmentioning

confidence: 99%

Silicon induces hormetic dose-response effects on growth and concentrations of chlorophylls, amino acids and sugars in pepper plants during the early developmental stage

Trejo-Téllez

García-Jiménez

Escobar-Sepúlveda

et al. 2020

PeerJ

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Background Silicon (Si) is a beneficial element that has been proven to influence plant responses including growth, development and metabolism in a hormetic manner. Methods In the present study, we evaluated the effect of Si on the growth and concentrations of chlorophylls, total amino acids, and total sugars of pepper plants (Capsicum annuum L.) during the early developmental stage in a hydroponic system under conventional (unstressed) conditions. We tested four Si concentrations (applied as calcium silicate): 0, 60, 125 and 250 mg L−1, and growth variables were measured 7, 14, 21 and 28 days after treatment (dat), while biochemical variables were recorded at the end of the experiment, 28 dat. Results The application of 125 mg L−1 Si improved leaf area, fresh and dry biomass weight in leaves and stems, total soluble sugars, and concentrations of chlorophylls a and b in both leaves and stems. The amino acids concentration in leaves and roots, as well as the stem diameter were the highest in plants treated with 60 mg L−1 Si. Nevertheless, Si applications reduced root length, stem diameter and total free amino acids in leaves and stems, especially when applied at the highest concentration (i.e., 250 mg L−1 Si). Conclusion The application of Si has positive effects on pepper plants during the early developmental stage, including stimulation of growth, as well as increased concentrations of chlorophylls, total free amino acids and total soluble sugars. In general, most benefits from Si applications were observed in the range of 60–125 mg L−1 Si, while some negative effects were observed at the highest concentration applied (i.e., 250 mg L−1 Si). Therefore, pepper is a good candidate crop to benefit from Si application during the early developmental stage under unstressed conditions.

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“…Si is coming to the fore as a true “Cinderella” element (Artyszak, 2018), gaining interest among scientists from across the world because of its effective role in plant physiology, nutrition, and defense response. The valuable role of exogenous Si on plant growth and yield has been well-documented in the literature, but its true potential lies in the amelioration of abiotic and biotic stresses (Rodrigues and Datnoff, 2015; Khan et al, 2018; Wu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Silicon and Salinity: Crosstalk in Crop-Mediated Stress Tolerance Mechanisms

et al. 2019

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Salinity stress hinders the growth potential and productivity of crop plants by influencing photosynthesis, disturbing the osmotic and ionic concentrations, producing excessive oxidants and radicals, regulating endogenous phytohormonal functions, counteracting essential metabolic pathways, and manipulating the patterns of gene expression. In response, plants adopt counter mechanistic cascades of physio-biochemical and molecular signaling to overcome salinity stress; however, continued exposure can overwhelm the defense system, resulting in cell death and the collapse of essential apparatuses. Improving plant vigor and defense responses can thus increase plant stress tolerance and productivity. Alternatively, the quasi-essential element silicon (Si)—the second-most abundant element in the Earth’s crust—is utilized by plants and applied exogenously to combat salinity stress and improve plant growth by enhancing physiological, metabolomic, and molecular responses. In the present review, we elucidate the potential role of Si in ameliorating salinity stress in crops and the possible mechanisms underlying Si-associated stress tolerance in plants. This review also underlines the need for future research to evaluate the role of Si in salinity stress in plants and the identification of gaps in the understanding of this process as a whole at a broader field level.

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Silicon decreases cadmium concentrations by modulating root endodermal suberin development in wheat plants

Cited by 132 publications

References 39 publications

Interactive Effects of Salicylic Acid and Nitric Oxide in Enhancing Rice Tolerance to Cadmium Stress

Interactive Effects of Salicylic Acid and Nitric Oxide in Enhancing Rice Tolerance to Cadmium Stress

Silicon induces hormetic dose-response effects on growth and concentrations of chlorophylls, amino acids and sugars in pepper plants during the early developmental stage

Silicon and Salinity: Crosstalk in Crop-Mediated Stress Tolerance Mechanisms

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