Salicylic acid improves the antioxidant ability against arsenic-induced oxidative stress in sunflower (<i>Helianthus annuus</i>) seedling

Saidi, Issam; Yousfi, Nasreddine; Borgi, Mohamed Ali

doi:10.1080/01904167.2017.1310888

Cited by 55 publications

(17 citation statements)

References 41 publications

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“…Plants are able to reduce toxic metal/metalloid, such as As, induced disturbances up to a limited extent by utilizing a number of mechanisms, i.e., by synthesizing metal binding proteins (e.g., metallothioneins and PCs) [ 32 , 50 , 270 ], and through the elimination of toxic elements from cells by specific transporters or compartmentalization [ 32 , 39 , 51 ] ( Figure 1 ). In addition, under a wide range of stress conditions, members of the plant defense system (both enzymatic and non-enzymatic) become hyperactive and have better control over the ROS, which is a prime facilitator of cellular injury [ 43 , 52 , 76 , 271 , 272 , 273 ].…”

Section: Detoxification Mechanisms Of Arsenic In Plantsmentioning

confidence: 99%

“…Moreover, As-regulated oxidative stress could be successfully reversed in plants by exogenous supply of proline [ 233 , 277 ]. Sodium nitroprusside, a source of NO [ 39 , 278 , 279 ], SA [ 52 , 280 ], and Pi [ 7 , 54 ], has also been shown to provide tolerance against As in many plants.…”

Section: Detoxification Mechanisms Of Arsenic In Plantsmentioning

confidence: 99%

“…Ascorbate peroxidase is found in organelles which can scavenge H 2 O 2 produced within it, whereas cytosolic APX abolishes H 2 O 2 produced in the apoplast or cytoplasm, or that diffused from organelles [ 309 ]. Under As stress, the role of APX in mitigating the harmful effects of H 2 O 2 has been well documented [ 39 , 44 , 52 , 128 , 198 , 289 ] (see Table 2 ).…”

Section: Detoxification Mechanisms Of Arsenic In Plantsmentioning

confidence: 99%

“…In As supplemented Anadenanthera peregrina plants, increased activities of SOD, CAT, and APX were investigated initially, which tended to decline later with increasing time of exposure or a high As dose [ 128 ]. Many authors [ 26 , 52 , 54 , 180 ] have found that, with enhancement in As supply, the activities of antioxidant enzymes were increased in various plant species, such as Glycine max L., Helianthus annuus , Triticum aestivum , and Oryza sativa . The As-hyperaccumulating fern species have much higher tolerance against As due to higher activities of antioxidant enzymes and low concentrations of ROS [ 196 , 273 , 294 , 313 ].…”

Section: Detoxification Mechanisms Of Arsenic In Plantsmentioning

confidence: 99%

“…Thiol-reactive cysteine-rich peptides such as phytochelatins (PCs) and metallothioneins strongly bind with As and convert it to a non-toxic form [ 32 , 51 ]. Recent research shows that the exogenous supply of salicylic acid (SA) [ 26 , 52 ], nitric oxide (NO) [ 26 , 53 ], and phosphorous [ 7 , 54 ] can help mitigate As-induced toxicities in plants through various mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Arsenic Uptake, Toxicity, Detoxification, and Speciation in Plants: Physiological, Biochemical, and Molecular Aspects

Abbas

Murtaza

Bibi

et al. 2018

IJERPH

657

256

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Environmental contamination with arsenic (As) is a global environmental, agricultural and health issue due to the highly toxic and carcinogenic nature of As. Exposure of plants to As, even at very low concentration, can cause many morphological, physiological, and biochemical changes. The recent research on As in the soil-plant system indicates that As toxicity to plants varies with its speciation in plants (e.g., arsenite, As(III); arsenate, As(V)), with the type of plant species, and with other soil factors controlling As accumulation in plants. Various plant species have different mechanisms of As(III) or As(V) uptake, toxicity, and detoxification. This review briefly describes the sources and global extent of As contamination and As speciation in soil. We discuss different mechanisms responsible for As(III) and As(V) uptake, toxicity, and detoxification in plants, at physiological, biochemical, and molecular levels. This review highlights the importance of the As-induced generation of reactive oxygen species (ROS), as well as their damaging impacts on plants at biochemical, genetic, and molecular levels. The role of different enzymatic (superoxide dismutase, catalase, glutathione reductase, and ascorbate peroxidase) and non-enzymatic (salicylic acid, proline, phytochelatins, glutathione, nitric oxide, and phosphorous) substances under As(III/V) stress have been delineated via conceptual models showing As translocation and toxicity pathways in plant species. Significantly, this review addresses the current, albeit partially understood, emerging aspects on (i) As-induced physiological, biochemical, and genotoxic mechanisms and responses in plants and (ii) the roles of different molecules in modulation of As-induced toxicities in plants. We also provide insight on some important research gaps that need to be filled to advance our scientific understanding in this area of research on As in soil-plant systems.

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