Effects of boron, silicon and their interactions on cadmium accumulation and toxicity in rice plants

Chen, Dongmei; Chen, Daoqian; Xue, Rongrong; Long, Jun; Lin, Xianhui; Lin, Yibin; Jia, Lianghai; Zeng, Rensen; Song, Yuanyuan

doi:10.1016/j.jhazmat.2018.12.111

Cited by 223 publications

(51 citation statements)

References 58 publications

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“…However, little is known about this phenomenon in tomato plants. The results presented in this study concur with those of previous reports by Mahdieh, et al [67], Abbas, et al [68], and Chen, et al [69], where the application of exogenous Si alleviated the negative effects of abiotic stress and restored plant growth. The growth impacts were inferred from the increased levels in the concentration of photosynthetic pigments (Chl a, Chl b, and carotenoids) in Si + heat-stressed plants, while studies by [70], Wang, et al [71], and Chalanika De Silva and Asaeda [72] showed that these concentrations were reduced by heat stress.…”

Section: Discussionsupporting

confidence: 93%

Silicon-induced thermotolerance in Solanum lycopersicum L. via activation of antioxidant system, heat shock proteins, and endogenous phytohormones

Khan

Imran

et al. 2020

BMC Plant Biol

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Background: Abiotic stresses (e.g., heat or limited water and nutrient availability) limit crop production worldwide. With the progression of climate change, the severity and variation of these stresses are expected to increase. Exogenous silicon (Si) has shown beneficial effects on plant growth; however, its role in combating the negative effects of heat stress and their underlying molecular dynamics are not fully understood. Results: Exogenous Si significantly mitigated the adverse impact of heat stress by improving tomato plant biomass, photosynthetic pigments, and relative water content. Si induced stress tolerance by decreasing the concentrations of superoxide anions and malondialdehyde, as well as mitigating oxidative stress by increasing the gene expression for antioxidant enzymes (peroxidases, catalases, ascorbate peroxidases, superoxide dismutases, and glutathione reductases) under stress conditions. This was attributed to increased Si uptake in the shoots via the upregulation of low silicon (SlLsi1 and SlLsi2) gene expression under heat stress. Interestingly, Si stimulated the expression and transcript accumulation of heat shock proteins by upregulating heat transcription factors (Hsfs) such as SlHsfA1a-b, SlHsfA2-A3, and SlHsfA7 in tomato plants under heat stress. On the other hand, defense and stress signaling-related endogenous phytohormones (salicylic acid [SA]/abscisic acid [ABA]) exhibited a decrease in their concentration and biosynthesis following Si application. Additionally, the mRNA and gene expression levels for SA (SlR1b1, SlPR-P2, SlICS, and SlPAL) and ABA (SlNCEDI) were downregulated after exposure to stress conditions. Conclusion: Si treatment resulted in greater tolerance to abiotic stress conditions, exhibiting higher plant growth dynamics and molecular physiology by regulating the antioxidant defense system, SA/ABA signaling, and Hsfs during heat stress.

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Section: Discussionsupporting

confidence: 93%

Silicon-induced thermotolerance in Solanum lycopersicum L. via activation of antioxidant system, heat shock proteins, and endogenous phytohormones

Khan

Imran

et al. 2020

BMC Plant Biol

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“…There is a crucial need to improve the production of wheat and barley for a growing population. However, environmental stresses such as salinity, drought, heat, freezing, heavy metal and even pathogen infections seriously threaten the growth and yield of wheat and barley under field conditions [5][6][7][8][9][10][11][12]. For instance, the majority of crops are highly sensitive to salinity, and the average yield of all important glycophytic crops decreased by 50%-80% at medium salinity conditions [5].…”

Section: Introductionmentioning

confidence: 99%

“…Temperatures in excess of 33 • C in this stage result in a decrease of leaf photosynthesis, an accumulation of peroxides, and serious yield loss [9]. For heavy metal, cadmium (Cd) at low concentrations (0.3-0.8 mg kg −1 ) in soils could inhibit regular cell division, decrease photosynthesis and impair antioxidant enzyme activity [10,11]. In all major wheat-growing areas, lead (Pb) accumulation is generally accompanied by Cd pollution, seriously threatening crop yield and safety [12].…”

Section: Introductionmentioning

confidence: 99%

Insight into the Role of Epigenetic Processes in Abiotic and Biotic Stress Response in Wheat and Barley

Kong

Liu

Wang

et al. 2020

IJMS

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Environmental stresses such as salinity, drought, heat, freezing, heavy metal and even pathogen infections seriously threaten the growth and yield of important cereal crops including wheat and barley. There is growing evidence indicating that plants employ sophisticated epigenetic mechanisms to fine-tune their responses to environmental stresses. Here, we provide an overview of recent developments in understanding the epigenetic processes and elements—such as DNA methylation, histone modification, chromatin remodeling, and non-coding RNAs—involved in plant responses to abiotic and biotic stresses in wheat and barley. Potentials of exploiting epigenetic variation for the improvement of wheat and barley are discussed.

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“…This means that, to some extent, plants can modulate B uptake and suggests that plants develop a B‐dependent tolerance mechanism against Cd toxicity. Consistently, additional B supplementation showed to alleviate side effects from Cd exposure on rice plants by sustaining root biomass and mitigating Cd‐induced decreases in root length (Chen et al, ). Boron‐induced changes in root architecture can be mediated by changing auxin balance, especially through modifications in the transport system of this hormone (Kutschera & Niklas, ).…”

Section: Acquisition Of Nutrients and Watermentioning

confidence: 85%

The sweet side of misbalanced nutrients in cadmium‐stressed plants

Carvalho

Castro

Kozak

2020

Annals of Applied Biology

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Some plants are able to maintain or improve their performance under cadmium (Cd) exposure, despite high Cd concentrations in roots and shoots, indicating that they have protective strategies to neutralise the side effects from Cd accumulation.The regulation of antioxidant machinery and the mitigation of Cd uptake and translocation have been the focus of several studies, but evidence shows that the modulation of nutritional status is also involved in tolerance mechanisms. Although alterations in the nutrient concentrations are usually coupled to negative outcomes on the development of plants under Cd exposure, current works have shown their "sweet" sides. Here, we provide evidence that the degree of plant tolerance to short Cd exposure is, at least partially, associated with differential changes in magnesium (Mg), manganese (Mn) and boron (B) status, all of which modulate physiological and developmental events, such as root architecture (Mg and/or B status), ionomic balance (Mn and/or B status), biomass production (Mg and/or Mn status) and biomass allocation (Mg/K ratio). Modulation of root architecture can be a strategy to obtain water and nutrients in metal-free patches in a growing medium. Changes in the uptake and/or distribution of nutrients may adjust the ionomic profile to equilibrate charge and pH homeostasis after Cd entrance into the plant. Alterations in the Mn and Mg status may alter the balance between photorespiratory and photosynthetic metabolisms. Finally, reprogramming biomass allocation among organs can be a strategy to remodelling plant body in order to better cope with environmental challenges. The identification and understanding of plant tolerance mechanisms against heavy metal toxicity is necessary to support strategies to mitigate their impacts on crop productivity and quality, supporting food security in increasing environmental contamination in the Anthropocene. K E Y W O R D S biomass allocation and partitioning, boron, magnesium, manganese, photorespiratory metabolism, photosynthetic metabolism

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Effects of boron, silicon and their interactions on cadmium accumulation and toxicity in rice plants

Cited by 223 publications

References 58 publications

Silicon-induced thermotolerance in Solanum lycopersicum L. via activation of antioxidant system, heat shock proteins, and endogenous phytohormones

Silicon-induced thermotolerance in Solanum lycopersicum L. via activation of antioxidant system, heat shock proteins, and endogenous phytohormones

Insight into the Role of Epigenetic Processes in Abiotic and Biotic Stress Response in Wheat and Barley

The sweet side of misbalanced nutrients in cadmium‐stressed plants

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