Selenium-Induced Toxicity Is Counteracted by Sulfur in Broccoli (Brassica oleracea L. var. italica)

Tian, Ming; Hui, Maixia; Thannhauser, Theodore W.; Pan, Siyi; Li, Li

doi:10.3389/fpls.2017.01425

Cited by 45 publications

(24 citation statements)

References 52 publications

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“…Cd toxicity negatively affects photosynthesis by reducing chlorophyll content, which adversely influences general plant growth and development by disrupting vital metabolic processes (Kim et al, 2008;Hong et al, 2013;Jan et al, 2015;Khan et al, 2015;Jung et al, 2016Jung et al, , 2017Jung et al, , 2018bFarooq et al, 2018). Recently, some studies have demonstrated that the exogenous application of sulfur (Khan et al, 2015;Jung et al, 2017;Tian et al, 2017), glutathione (Chen et al, 2010;Mostofa et al, 2014;Kim et al, 2017;Jung et al, 2019) or ascorbate (Chen et al, 2017;Jung et al, 2018a;Semida et al, 2018;Zhang et al, 2019) may alleviate different heavy metal stresses.…”

Section: Discussionmentioning

confidence: 99%

Ascorbate-Mediated Modulation of Cadmium Stress Responses: Reactive Oxygen Species and Redox Status in Brassica napus

et al. 2020

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The role of ascorbate (AsA) in antioxidant defense system-associated resistance to cadmium (Cd) in oilseed rape plants has not yet been clearly demonstrated. The present study investigated the critical role of exogenous AsA on the physiological and biochemical responses of reactive oxygen species (ROS) and antioxidant scavenging defense systems in oilseed rape (Brassica napus L. cv. Tammi) seedlings exposed to Cd. Cd (10 μM) treatment led to significant reductions in plant growth; increases in the levels of superoxide anion radical, hydrogen peroxide, and malondialdehyde; and increases in Cd uptake and accumulation by the roots and shoots in hydroponically grown 10-day-old seedlings. Moreover, it reduced AsA content and AsA redox ratios, which have been correlated with reductions in glutathione (GSH) and/or nicotinamide adenine dinucleotide phosphate (NADPH) redox status. However, exogenously applying AsA to Cd-exposed seedlings decreased Cd-induced ROS, improved antioxidant defense systems by increasing AsA, GSH, and NADPH contents, and increased Cd uptake and accumulation in both roots and shoots of the plants. These results provided evidence that the enhancement in AsA redox status can be linked to an increase in the GSH and/or NADPH redox ratios through the induction of the AsA–GSH–NADPH cycle. Thus, these results suggest that exogenous AsA application to oilseed rape seedlings under Cd stress might alleviate the overall Cd toxicity by regulating the homeostasis of the AsA–GSH–NADPH cycle, which reestablishes the steady-state cellular redox status.

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Section: Discussionmentioning

confidence: 99%

Ascorbate-Mediated Modulation of Cadmium Stress Responses: Reactive Oxygen Species and Redox Status in Brassica napus

et al. 2020

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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%

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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“…Se shares similar metabolic pathways in plants with sulfur (S) because of their chemical and physical similarities (Shinmachi et al, 2010 ; Tian et al, 2017 ). There are two key enzymes involved in Se metabolism pathways: ATP sulfurylase (ATPS) and selenocysteine methyltransferase (SMT).…”

Section: Microelements and Their Genetic Regulation Via Transgenic Apmentioning

confidence: 99%

Prospecting for Microelement Function and Biosafety Assessment of Transgenic Cereal Plants

Luo

Huang

et al. 2018

Front. Plant Sci.

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Microelement contents and metabolism are vitally important for cereal plant growth and development as well as end-use properties. While minerals phytotoxicity harms plants, microelement deficiency also affects human health. Genetic engineering provides a promising way to solve these problems. As plants vary in abilities to uptake, transport, and accumulate minerals, and the key enzymes acting on that process is primarily presented in this review. Subsequently, microelement function and biosafety assessment of transgenic cereal plants have become a key issue to be addressed. Progress in genetic engineering of cereal plants has been made with the introduction of quality, high-yield, and resistant genes since the first transgenic rice, corn, and wheat were born in 1988, 1990, and 1992, respectively. As the biosafety issue of transgenic cereal plants has now risen to be a top concern, many studies on transgenic biosafety have been carried out. Transgenic cereal biosafety issues mainly include two subjects, environmental friendliness and end-use safety. Different levels of gene confirmation, genomics, proteomics, metabolomics and nutritiomics, absorption, metabolism, and function have been investigated. Also, the different levels of microelement contents have been measured in transgenic plants. Based on the motivation of the requested biosafety, systematic designs, and analysis of transgenic cereal are also presented in this review paper.

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Selenium-Induced Toxicity Is Counteracted by Sulfur in Broccoli (Brassica oleracea L. var. italica)

Cited by 45 publications

References 52 publications

Ascorbate-Mediated Modulation of Cadmium Stress Responses: Reactive Oxygen Species and Redox Status in Brassica napus

Ascorbate-Mediated Modulation of Cadmium Stress Responses: Reactive Oxygen Species and Redox Status in Brassica napus

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

Prospecting for Microelement Function and Biosafety Assessment of Transgenic Cereal Plants

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