Ascorbic acid improves the tolerance of wheat plants to lead toxicity

Alamri, Saud; Siddiqui, Manzer H.; Al-Khaishany, Mutahhar Y.; Khan, Md. Raisuddin; Ali, Hayssam M.; Alaraidh, Ibrahim A.; Alsahli, Abdulaziz Abdullah; AlRabiah, Hala Khalid; Mateen, Mohammed Abdul

doi:10.1080/17429145.2018.1491067

Cited by 89 publications

(53 citation statements)

References 61 publications

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“…Alamri et al [196] investigated the potentiality of exogenous AsA to remove the metal-induced oxidative stress in T. aestivum . They observed that AsA suppressed the higher content of MDA and H 2 O 2 in Pb exposed seedlings by improving the antioxidant enzymes activities, including SOD, CAT, and GR.…”

Section: Exogenous Use Of Asa and Gsh In Conferring Abiotic Stressmentioning

confidence: 99%

Regulation of Ascorbate-Glutathione Pathway in Mitigating Oxidative Damage in Plants under Abiotic Stress

et al. 2019

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Reactive oxygen species (ROS) generation is a usual phenomenon in a plant both under a normal and stressed condition. However, under unfavorable or adverse conditions, ROS production exceeds the capacity of the antioxidant defense system. Both non-enzymatic and enzymatic components of the antioxidant defense system either detoxify or scavenge ROS and mitigate their deleterious effects. The Ascorbate-Glutathione (AsA-GSH) pathway, also known as Asada–Halliwell pathway comprises of AsA, GSH, and four enzymes viz. ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, and glutathione reductase, play a vital role in detoxifying ROS. Apart from ROS detoxification, they also interact with other defense systems in plants and protect the plants from various abiotic stress-induced damages. Several plant studies revealed that the upregulation or overexpression of AsA-GSH pathway enzymes and the enhancement of the AsA and GSH levels conferred plants better tolerance to abiotic stresses by reducing the ROS. In this review, we summarize the recent progress of the research on AsA-GSH pathway in terms of oxidative stress tolerance in plants. We also focus on the defense mechanisms as well as molecular interactions.

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Section: Exogenous Use Of Asa and Gsh In Conferring Abiotic Stressmentioning

confidence: 99%

Regulation of Ascorbate-Glutathione Pathway in Mitigating Oxidative Damage in Plants under Abiotic Stress

et al. 2019

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“…Heavy metal is defined as “a metal with a density greater than 5 g cm –3 .” Of a total of 53 HMs that occur naturally, 17 are biologically available and are important for the ecosystem ( Alamri et al, 2018 ). For plants, Pb is a nonessential element, so it becomes toxic even at low concentrations.…”

Section: Toxicity Level and Mode Of Actionmentioning

confidence: 99%

“…There are important economic and ecological benefits from the use of microbes to adjust the concentration of HMs in the soil and to boost the ability of plants to cope with high concentrations of metals ( Alamri et al, 2018 ; Jin et al, 2018 ). The response of cereals to Pb toxicity can be improved by applying plant-associated microorganisms that promote growth and developmental physiology.…”

Section: Phytoremediationmentioning

confidence: 99%

“…In the case of wheat, by using triple superphosphate, calcium magnesium phosphate, and single superphosphate in combination with ZnSO 4 , the phytoavailability of Pb (∼42.14%) in soils was decreased ( Chemek et al, 2016 ). The activity of soil eco-enzymes and the protection of heavy metal concentration in cereal grains sown in chemical-treated industrial soil (acid washing/amendments) was the same as that grown on untreated soils; there were no risks to human health in both cases ( Alamri et al, 2018 ).…”

Section: Phyto-managementmentioning

confidence: 99%

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Lead Toxicity in Cereals: Mechanistic Insight Into Toxicity, Mode of Action, and Management

Aslam

Sheraz

et al. 2021

Front. Plant Sci.

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Cereals are the major contributors to global food supply, accounting for more than half of the total human calorie requirements. Sustainable availability of quality cereal grains is an important step to address the high-priority issue of food security. High concentrations of heavy metals specifically lead (Pb) in the soil negatively affect biochemical and physiological processes regulating grain quality in cereals. The dietary intake of Pb more than desirable quantity via food chain is a major concern for humans, as it can predispose individuals to chronic health issues. In plant systems, high Pb concentrations can disrupt several key metabolic processes such as electron transport chain, cellular organelles integrity, membrane stability index, PSII connectivity, mineral metabolism, oxygen-evolving complex, and enzymatic activity. Plant growth-promoting rhizobacteria (PGPR) has been recommended as an inexpensive strategy for remediating Pb-contaminated soils. A diverse group of Ascomycetes fungi, i.e., dark septate endophytes is successfully used for this purpose. A symbiotic relationship between endophytes and host cereal induces Pb tolerance by immobilizing Pb ions. Molecular and cellular modifications in plants under Pb-stressed environments are explained by transcription factor families such as bZIP, ERF, and GARP as a regulator. The role of metal tolerance protein (MTP), natural resistance-associated macrophage protein (NRAMP), and heavy metal ATPase in decreasing Pb toxicity is well known. In the present review, we provided the contemporary synthesis of existing data regarding the effects of Pb toxicity on morpho-physiological and biochemical responses of major cereal crops. We also highlighted the mechanism/s of Pb uptake and translocation in plants, critically discussed the possible management strategies and way forward to overcome the menace of Pb toxicity in cereals.

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“…It was suggested that foliar applications of AsA could be used as a management practice to alleviate the water stress in young peach trees and improve their performance after rewatering [206]. In nonwoody plants, AsA foliar spraying efficiently mitigated the detrimental effects of water stress in maize [207] and wheat [208], and Pb toxicity-induced oxidative damage in wheat plants [209] and faba bean [210]. Asc foliar spraying increased tolerance to water deficit by reducing ROS levels and ROS-induced damage in pot marigold [211], increasing the resistance to salt stress and lipid peroxidation in tomato [212], and affecting millet growth and salinity resistance [213].…”

Section: The Effects Of Asa Applicationmentioning

confidence: 99%

Ascorbic Acid—The Little-Known Antioxidant in Woody Plants

et al. 2019

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Reactive oxygen species (ROS) are constantly produced by metabolically active plant cells. The concentration of ROS may determine their role, e.g., they may participate in signal transduction or cause oxidative damage to various cellular components. To ensure cellular homeostasis and minimize the negative effects of excess ROS, plant cells have evolved a complex antioxidant system, which includes ascorbic acid (AsA). AsA is a multifunctional metabolite with strong reducing properties that allows the neutralization of ROS and the reduction of molecules oxidized by ROS in cooperation with glutathione in the Foyer-Halliwell-Asada cycle. Antioxidant enzymes involved in AsA oxidation and reduction switches evolved uniquely in plants. Most experiments concerning the role of AsA have been performed on herbaceous plants. In addition to extending our understanding of this role in additional taxa, fundamental knowledge of the complex life cycle stages of woody plants, including their development and response to environmental factors, will enhance their breeding and amend their protection. Thus, the role of AsA in woody plants compared to that in nonwoody plants is the focus of this paper. The role of AsA in woody plants has been studied for nearly 20 years. Studies have demonstrated that AsA is important for the growth and development of woody plants. Substantial changes in AsA levels, as well as reduction and oxidation switches, have been reported in various physiological processes and transitions described mainly in leaves, fruits, buds, and seeds. Evidently, AsA exhibits a dual role in the photoprotection of the photosynthetic apparatus in woody plants, which are the most important scavengers of ozone. AsA is associated with proper seed production and, thus, woody plant reproduction. Similarly, an important function of AsA is described under drought, salinity, temperature, light stress, and biotic stress. This report emphasizes the involvement of AsA in the ecological advantages, such as nutrition recycling due to leaf senescence, of trees and shrubs compared to nonwoody plants.

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Ascorbic acid improves the tolerance of wheat plants to lead toxicity

Cited by 89 publications

References 61 publications

Regulation of Ascorbate-Glutathione Pathway in Mitigating Oxidative Damage in Plants under Abiotic Stress

Regulation of Ascorbate-Glutathione Pathway in Mitigating Oxidative Damage in Plants under Abiotic Stress

Lead Toxicity in Cereals: Mechanistic Insight Into Toxicity, Mode of Action, and Management

Ascorbic Acid—The Little-Known Antioxidant in Woody Plants

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