Silicon ameliorates chromium toxicity through phytochelatin-mediated vacuolar sequestration in the roots of <i>Oryza sativa</i> (L.)

., A.K.M.N. Huda; Haque, Mohammad Anwarul; Zaman, Reshma; Swaraz, A.M.; Kabir, Ahmad Humayan

doi:10.1080/15226514.2016.1211986

Cited by 38 publications

(13 citation statements)

References 41 publications

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“…These findings suggest that Ca +2 interact with cellular mechanisms associated with vacuolar sequestration upon Cr exposure through PC synthesis regulation in the roots of rice plants to withstand Cr toxicity. Similar type of result was also found in rice after applying silicon and salicylic acid under chromium stress (Huda et al 2016(Huda et al , 2017.…”

Section: Enzymessupporting

confidence: 81%

Calcium induces phytochelatin accumulation to cope with chromium toxicity in rice (Oryza sativaL.)

Mukta

Khatun

2019

Journal of Plant Interactions

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Heavy metal chromium (Cr) is considered to be a serious environmental contaminant due to its toxic effect on living organisms. To mitigate and reduce the negative impacts of Cr in rice plant, the effect of exogenous supplementary calcium was evaluated as it functions as a signaling molecule at cellular level. In this study, growth parameters, protein content, and membrane stability were found to be restored due to calcium under Cr stress. Further, Atomic absorption spectrophotometric analysis revealed that calcium inhibits Cr translocation from root to shoot in rice seedlings. This event was addressed by the enhanced accumulation of phytochelatin that leads to vacuolar sequestration of Cr in roots. Furthermore, increased activity of Catalase, Peroxidase, and Glutathione reductase along with elevated glutathione also assures that calcium enhances antioxidant defense mechanism to cope with Cr toxicity.

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Section: Enzymessupporting

confidence: 81%

Calcium induces phytochelatin accumulation to cope with chromium toxicity in rice (Oryza sativaL.)

Mukta

Khatun

2019

Journal of Plant Interactions

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“…Alleviation of As uptake in rice at the whole plant as well as the cellular level was reported to be involved with vacuolar sequestration of the phloem companion cells (Song et al 2014). In the present study, upregulation of TaPCS1 and PC accumulation suggest that PC does play critical role to withstand As stress due to Si supplementation being consistent with the previous findings (Huda et al 2016). This molecular evidence is consistent with our AAS data confirming the hypothesis that though increased As is entered through root intake in Wheat plants under As stress; it gets stored in root vacuole leading to decreased translocation of As in shoots.…”

Section: Discussionsupporting

confidence: 92%

Silicon alleviates arsenic-induced toxicity in wheat through vacuolar sequestration and ROS scavenging

Hossain

Khatun

Haque

et al. 2018

International Journal of Phytoremediation

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Arsenic (As) is a phytotoxic element causing health hazards. This work investigates whether and how silicon (Si) alleviates As toxicity in wheat. The addition of Si under As-stress significantly improved morphophysiological characteristics, total protein, and membrane stability compared to As-stressed plants, suggesting that Si does have critical roles in As detoxification in wheat. Analysis of arsenate reductase activity and phytosiderophore (PS) release reveals their no involvement in the Si-mediated alleviation of As in wheat. Furthermore, Si supplementation in As-stressed plants showed a significant increase of As in roots but not in shoots compared with the plants grown under As stress. Further, gene expression analysis of two chelating molecules, TaPCS1 (phytochelatin synthase) and TaMT1 (metallothionein synthase) showed significant induction due to Si application under As stress compared with As-stressed plants. It is consistent with the physiological observations and suggests that alleviation of As toxicity in rice might be associated with As sequestration in roots leading to reduced As translocation in shoots. Furthermore, increased catalase, peroxidase, and glutathione reductase activities in roots imply the active involvement of reactive oxygen species scavenging for protecting wheat plants from As-induced oxidative injury. The study provides mechanistic evidence on the beneficial effect of Si on As toxicity in wheat plants.

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“…Chromium (Cr) is one of the most toxic and seventh‐most abundant heavy metal in the earth's crust (Dubey et al, ; Huda, Haque, Zaman, Swaraz, & Kabir, ). It is released into the environment by fertilizer, paint, and leather industries.…”

Section: Introductionmentioning

confidence: 99%

“…In plants, high Cr(VI) levels cause a decrease in seed germination, root elongation, leaf number, area and biomass, and greatly affect plant morphology as well as physiological, biochemical, and molecular processes (Huda et al, ; Kabir, ; Martinez‐Trujillo et al, ; Ortiz‐Castro, Martínez‐Trujillo, López‐Bucio, & Cervantes, ; Shanker, Cervantes, Loza‐Tavera, & Avudainayagam, ). Cr stress also exerts cytotoxic, genotoxic, and mutagenic effects in plant cells by causing cell cycle seizure, diminishing of cell division dynamics, derangement of the cytoskeleton, chromosomal aberrations, and stimulation of micronuclei formation (Eleftheriou et al, ; Patnaik, Achary, & Panda, ; Truta, Mihai, Gherghel, & Vochita, ).…”

Section: Introductionmentioning

confidence: 99%

“…The greater amount of Cr in soil occurs in Cr(III) state, which is very stable, less mobile and less toxic as compared with the Cr(VI) state (Eleftheriou, Adamakis, Panteris, & Fatsiou, ; Shanker, Djanaguiraman, & Venkateswarlu, ). Cr is highly toxic to plants and accumulates in food and agricultural products through contaminated water, soil, and air, thus posing a severe health risk to plant consumers worldwide (Huda et al, ; Lin, Wong, & Li, ; Singh, Mahajan, Kaur, Batish, & Kohli, ). Consequently, studies on the mechanism and fundamental principles of plant responses and adaptation to Cr(VI) are important for the basic biological sciences and agricultural applications.…”

Section: Introductionmentioning

confidence: 99%

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Ethylene mediates dichromate‐induced inhibition of primary root growth by altering AUX1 expression and auxin accumulation in Arabidopsis thaliana

Wakeel

Ali

Upreti

et al. 2018

Plant Cell & Environment

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The hexavalent form of chromium [Cr(VI)] causes a major reduction in yield and quality of crops worldwide. The root is the first plant organ that interacts with Cr(VI) toxicity, which inhibits primary root elongation, but the underlying mechanisms of this inhibition remain elusive. In this study, we investigate the possibility that Cr(VI) reduces primary root growth of Arabidopsis by modulating the cell cycle-related genes and that ethylene signalling contributes to this process. We show that Cr(VI)-mediated inhibition of primary root elongation was alleviated by the ethylene perception and biosynthesis antagonists silver and cobalt, respectively. Furthermore, the ethylene signalling defective mutants (ein2-1 and etr1-3) were insensitive, whereas the overproducer mutant (eto1-1) was hypersensitive to Cr(VI). We also report that high levels of Cr(VI) significantly induce the distribution and accumulation of auxin in the primary root tips, but this increase was significantly suppressed in seedlings exposed to silver or cobalt. In addition, genetic and physiological investigations show that AUXIN-RESISTANT1 (AUX1) participates in Cr(VI)-induced inhibition of primary root growth. Taken together, our results indicate that ethylene mediates Cr(VI)-induced inhibition of primary root elongation by increasing auxin accumulation and polar transport by stimulating the expression of AUX1.

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Silicon ameliorates chromium toxicity through phytochelatin-mediated vacuolar sequestration in the roots of Oryza sativa (L.)

Cited by 38 publications

References 41 publications

Calcium induces phytochelatin accumulation to cope with chromium toxicity in rice (Oryza sativaL.)

Calcium induces phytochelatin accumulation to cope with chromium toxicity in rice (Oryza sativaL.)

Silicon alleviates arsenic-induced toxicity in wheat through vacuolar sequestration and ROS scavenging

Ethylene mediates dichromate‐induced inhibition of primary root growth by altering AUX1 expression and auxin accumulation in Arabidopsis thaliana

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