Sulfur alleviates cadmium toxicity in rice (Oryza sativa L.) seedlings by altering antioxidant levels

Jung, Ha-il; Lee, Bok-Rye; Chae, Mi-Jin; Maria, Kong; Lee, Chang‐Hoon; Kang, Seong-Soo; Kim, Yoo-Hak

doi:10.1007/s12892-017-0072-0

Cited by 23 publications

(22 citation statements)

References 34 publications

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“…However, additional S together with Cr(VI) significantly mitigated Cr(VI) toxicity (Table 1). Similarly, S-mediated mitigation of Cd toxicity has been reported earlier in mustard and rice seedlings (Masood et al 2012, Jung et al 2017.…”

Section: Discussionsupporting

confidence: 71%

“…In the literature, this strategy for mitigating metal toxicity by using essential elements has been considered as nutrient management approach (Singh and Prasad ). Though in the recent years, there is an increasing amount of literature which has advocated efficiency of essential elements in mitigating metal toxicity with greater focus on Cd (Masood et al , Ahmad et al , Jung et al ); however, mechanism(s) associated with metal toxicity alleviation are still poorly known. Glutathione (GSH), a tripeptide (γ‐glu‐cys‐gly), serves as a major pool of reduced sulfur species and also discharges various functions in plants by maintaining cellular redox homeostasis (Hernández et al , Kim et al ).…”

Section: Introductionmentioning

confidence: 99%

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Glutathione and hydrogen sulfide are required for sulfur‐mediated mitigation of Cr(VI) toxicity in tomato, pea and brinjal seedlings

Kushwaha

Singh

2019

Physiologia Plantarum

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In plants, investigation on heavy metal toxicity and its mitigation by nutrient elements have gained much attention. However, mechanism(s) associated with nutrients‐mediated mitigation of metal toxicity remain elusive. In this study, we have investigated the role and interrelation of glutathione (GSH) and hydrogen sulfide (H2S) in the regulation of hexavalent chromium [Cr(VI)] toxicity in tomato (Solanum lycopersicum), pea (Pisum sativum) and brinjal (Solanum melongena) seedlings, supplemented with additional sulfur (S). The results show that Cr(VI) significantly reduced growth, total chlorophyll and photosynthetic quantum yield of tomato, pea and brinjal seedlings which was accompanied by enhanced intracellular accumulation of Cr(VI) in roots. Moreover, Cr(VI) enhanced the generation of reactive oxygen species in the studied vegetables, while antioxidant defense system exhibited differential responses. However, additional supply of S alleviated Cr(VI) toxicity. Interestingly, addition of l‐buthionine sulfoximine (BSO, a glutathione biosynthesis inhibitor) further increased Cr(VI) toxicity even in the presence of additional S but GSH addition reverses the effect of BSO. Under similar condition, endogenous H2S, l‐cysteine desulfhydrase (DES) activity and cysteine content did not significantly differ when compared to controls. Hydroxylamine (HA, an inhibitor of DES) also increased Cr(VI) toxicity even in the presence of additional S but sodium hydrosulfide (NaHS, an H2S donor) reverses the effect of HA. Moreover, Cr(VI) toxicity amelioration by NaHS was reversed by the addition of hypotaurine (HT, an H2S scavenger). Taken together, the results show that GSH which might be derived from supplied S is involved in the mitigation of Cr(VI) toxicity in which H2S signaling preceded GSH biosynthesis.

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Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Glutathione and hydrogen sulfide are required for sulfur‐mediated mitigation of Cr(VI) toxicity in tomato, pea and brinjal seedlings

Kushwaha

Singh

2019

Physiologia Plantarum

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“…As toxicity affects photosynthesis by reducing the chlorophyll content, which negatively influences general plant growth and important metabolic processes, and by inhibiting adenosine triphosphate (ATP) biosynthesis by disrupting phosphorus uptake in the roots (Panda et al, 2010; Finnegan and Chen, 2012; Gupta and Ahmad, 2014; Jung et al, 2017b). Recently, some studies have demonstrated that the exogenous application of hydrogen sulfide (Singh et al, 2015b; Li et al, 2016; Chen et al, 2017), sulfur (Khan et al, 2015; Jung et al, 2017a; Tian et al, 2017), AsA (Jung et al, 2018; Semida et al, 2018), or GSH (Shri et al, 2009; Chen et al, 2010; Mostofa et al, 2014; Kim et al, 2017) may alleviate different heavy metal stresses.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, it disturbs metabolic pathways and redox homeostasis (Mostofa et al, 2014; Farooq et al, 2016). These complex biochemical effects can cause lipid peroxidation, which ultimately withers the rice plant via the destruction of cell membranes (Jung et al, 2017a; Sharma et al, 2017). This study demonstrated that As induced oxidative stresses by the overproduction of O 2 •− ( Figure 2A ) and H 2 O 2 ( Figure 2B ) in the roots and leaves of rice seedlings.…”

Section: Discussionmentioning

confidence: 99%

Exogenous Glutathione Increases Arsenic Translocation Into Shoots and Alleviates Arsenic-Induced Oxidative Stress by Sustaining Ascorbate–Glutathione Homeostasis in Rice Seedlings

et al. 2019

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Glutathione (GSH) plays diverse roles in the physiological processes, stress defense, growth, and development of plants. This study investigated the effects of exogenous GSH on the biochemical responses of reactive oxygen species and antioxidant levels in rice (Oryza sativa L. cv. Dasan) seedlings under arsenic (As) stress. As treatment inhibited growth; increased the level of superoxide, hydrogen peroxide, and malondialdehyde; and enhanced the uptake of As by the roots and shoots in hydroponically grown 14-day-old seedlings. Furthermore, it reduced GSH content and GSH redox ratios, which have been correlated with the decrease in ascorbate (AsA) redox state. Whereas the exogenous application of GSH in As-treated seedlings reduced As-induced oxidative stress, improved antioxidant defense systems by maintaining antioxidant and/or redox enzyme homeostasis, and increased the AsA and GSH contents, the GSH application also increased the As translocation from the roots to the shoots. These results indicated that the increase in GSH redox state can be linked to an increase in the AsA redox ratio via the induction of the AsA–GSH cycle. Therefore, the results suggest that exogenous GSH application should be a promising approach to enhance As stress resistance in rice plants.

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“…An increased level of H 2 O 2 decreases the efficiency of the plant for Cd tolerance; therefore, its accumulation is avoided properly by the action of the oxidoreductase enzymes CAT and POD [187]. An increased content of CAT in the leaf of Cd-tolerant wheat lines reduced the translocation of Cd from the root to shoot whereas the 50 µM Cd enhanced the MDA and reduced the activity of CAT and SOD in leaf [188]; while in Glycine max, greater Cd accumulation was observed in root with an increased level of GR (up to 370%) followed by CAT (271%) and SOD (193%) in a tolerant cultivar [189].…”

Section: Antioxidant Defense: a Key Mechanism Of Cadmium Tolerance Anmentioning

confidence: 99%

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

167

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Cadmium (Cd) is one of the most toxic metals in the environment, and has noxious effects on plant growth and production. Cd-accumulating plants showed reduced growth and productivity. Therefore, remediation of this non-essential and toxic pollutant is a prerequisite. Plant-based phytoremediation methodology is considered as one a secure, environmentally friendly, and cost-effective approach for toxic metal remediation. Phytoremediating plants transport and accumulate Cd inside their roots, shoots, leaves, and vacuoles. Phytoremediation of Cd-contaminated sites through hyperaccumulator plants proves a ground-breaking and profitable choice to combat the contaminants. Moreover, the efficiency of Cd phytoremediation and Cd bioavailability can be improved by using plant growth-promoting bacteria (PGPB). Emerging modern molecular technologies have augmented our insight into the metabolic processes involved in Cd tolerance in regular cultivated crops and hyperaccumulator plants. Plants’ development via genetic engineering tools, like enhanced metal uptake, metal transport, Cd accumulation, and the overall Cd tolerance, unlocks new directions for phytoremediation. In this review, we outline the physiological, biochemical, and molecular mechanisms involved in Cd phytoremediation. Further, a focus on the potential of omics and genetic engineering strategies has been documented for the efficient remediation of a Cd-contaminated environment.

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Sulfur alleviates cadmium toxicity in rice (Oryza sativa L.) seedlings by altering antioxidant levels

Cited by 23 publications

References 34 publications

Glutathione and hydrogen sulfide are required for sulfur‐mediated mitigation of Cr(VI) toxicity in tomato, pea and brinjal seedlings

Glutathione and hydrogen sulfide are required for sulfur‐mediated mitigation of Cr(VI) toxicity in tomato, pea and brinjal seedlings

Exogenous Glutathione Increases Arsenic Translocation Into Shoots and Alleviates Arsenic-Induced Oxidative Stress by Sustaining Ascorbate–Glutathione Homeostasis in Rice Seedlings

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

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