Glutathione and citric acid modulates lead- and arsenic-induced phytotoxicity and genotoxicity responses in two cultivars of Solanum lycopersicum L.

Kumar, Abhay; Pal, Lalita; Agrawal, Veena

doi:10.1007/s11738-017-2448-z

Cited by 21 publications

(9 citation statements)

References 61 publications

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“…In Coriandrum, a decrease of antioxidant contents, including anthocyanins, was found under As treatment, therefore Coriandrum is probably a sensitive plant [27]. In tolerant tomato, Kumar et al [84] found increased anthocyanins accompanied by an increase in carotenoids. The authors proposed that through anthocyanins and carotenoids, tomato can effectively defend itself [84].…”

Section: Antioxidant Molecules Accumulation Resulting From As Stressmentioning

confidence: 99%

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Multi-Component Antioxidative System and Robust Carbohydrate Status, the Essence of Plant Arsenic Tolerance

et al. 2020

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Arsenic (As) contaminates the food chain and decreases agricultural production through impairing plants, particularly due to oxidative stress. To better understand the As tolerance mechanisms, two contrasting tobacco genotypes: As-sensitive Nicotiana sylvestris and As-tolerant N.tabacum, cv. ‘Wisconsin’ were analyzed. The most meaningful differences were found in the carbohydrate status, neglected so far in the As context. In the tolerant genotype, contrary to the sensitive one, net photosynthesis rates and saccharide levels were unaffected by As exposure. Importantly, the total antioxidant capacity was far stronger in the As-tolerant genotype, based on higher antioxidants levels (e.g., phenolics, ascorbate, glutathione) and activities and/or appropriate localizations of antioxidative enzymes, manifested as reverse root/shoot activities in the selected genotypes. Accordingly, malondialdehyde levels, a lipid peroxidation marker, increased only in sensitive tobacco, indicating efficient membrane protection in As-tolerant species. We bring new evidence of the orchestrated action of a broad spectrum of both antioxidant enzymes and molecules essential for As stress coping. For the first time, we propose robust carbohydrate metabolism based on undisturbed photosynthesis to be crucial not only for subsidizing C and energy for defense but also for participating in direct reactive oxygen species (ROS) quenching. The collected data and suggestions can serve as a basis for the selection of plant As phytoremediators or for targeted breeding of tolerant crops.

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Section: Antioxidant Molecules Accumulation Resulting From As Stressmentioning

confidence: 99%

“…In tolerant tomato, Kumar et al [84] found increased anthocyanins accompanied by an increase in carotenoids. The authors proposed that through anthocyanins and carotenoids, tomato can effectively defend itself [84].…”

Section: Antioxidant Molecules Accumulation Resulting From As Stressmentioning

confidence: 99%

Multi-Component Antioxidative System and Robust Carbohydrate Status, the Essence of Plant Arsenic Tolerance

et al. 2020

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“…The role of CA in strengthening the plant defensive system and reducing oxidative stress under metal stress was previously reported [46,47]. The combined role of CA and other organic acids in reducing metal toxicity and protecting plants from different metals has been reported earlier [38,48,49].…”

Section: Discussionmentioning

confidence: 85%

“…The acid-amended plants exhibited adequate tolerance to Pb toxicity and the reduced oxidative stress as compared to non-amended plants. The CA and GHS combined presented a prominent role to reduce oxidative stress in treated plants, which indicated a promising role of CA and GHS in metal stress reduction [30,48]. The CA also showed its unique role in strengthening the plant defense system, reducing oxidative stress and supporting the normal functioning of plants under severe metal stress [13].…”

Section: H 2 O 2 Mda and Electrolyte Leakage (El) Contentsmentioning

confidence: 95%

Combined Citric Acid and Glutathione Augments Lead (Pb) Stress Tolerance and Phytoremediation of Castorbean through Antioxidant Machinery and Pb Uptake

et al. 2021

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Lead (Pb) is one of the most toxic elements on earth. The main origins of Pb pollution are automobiles, paint and electroplating industries. Pb-induced stress has very toxic effects on plant growth and biomass. The concentration of reactive oxygen species (ROS) in plant cells significantly increases under Pb stress, which interrupts the biochemical cycles in cells and leads to cell death. Therefore, it is essential to clean up the Pb-polluted soils. Among all techniques that are used to clean soil that is metal-contaminated, the best technique is phytoremediation. The present study intends to determine the role of citric acid (CA) and glutathione (GSH) in the phytoremediation of Pb by using castor bean plants. Plant biomass was significantly reduced due to Pb stress. Lead toxicity was also harmful to the photosynthetic pigments and antioxidant enzymes activities. In reverse, the content of malondialdehyde (MDA), H2O2 concentration and electrolyte leakage (EL) were increased under Pb stress. The combined application of GSH and CA enhanced photosynthetic pigments, antioxidant enzyme activities and plant biomass and minimized MDA, H2O2 and EL under Pb stress. The amount of Pb in roots and leaves remarkably increased by the joint application of CA and GSH. The combined application of CA and GSH (5 mM + 25 mM, respectively) was proven to be beneficial compared to the control. From the present results, we can conclude that the combined application of CA and GSH promoted the phytoremediation of Pb and helped the host plant to combat Pb toxicity.

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“…It acts as a strong toxic in mitosis which is responsible for causing spindle fibers disruption (Patra et al, 2004). In plant cells, cytoskeleton and nucleus disruption, damage of DNA strand, formation of micronucleus (Kumar et al, 2017), chromosomal abnormalities, variability in simple sequence repeats and depolymerization of micro tubule are some of the dangerous impacts suffered in the existence of Pb. Under low levels, mitosis is not affected by Pb, however causes certain abnormalities, damage to a centric DNA fragments during meiotic division, breaking of chromosomes, and micronucleus formation .…”

Section: Genotoxicity or Dna Damagementioning

confidence: 99%

Lead Uptake, Toxicity and Mitigation Strategies in Plants

Ashraf¹,

Bhardwaj²,

Ishtiaq³

et al. 2021

PLANT ARCHIVES

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The issues of heavy metal adulteration are becoming common in world. Heavy metal toxicity cases are prevailing in mining industries, smelters, power plants based on coal burning, agriculture, etc. There are several heavy metals, such as Cd, Cu, Pb, Cr, Hg, Ar, etc. These heavy metals are major pollutants of environment, particularly in areas with increasing anthropogenic activities. The cumulation of heavy metal in soils is of great concern in agriculture because of the deleterious effects on food safety, crop growth and soil organisms’ health. Heavy metals affect several physiological and biochemical processes in plants. They diminish crop yield by bringing toxic effects to several physiological processes in plants such as, seed chlorophyll reduced by the production of reactive oxygen species, affecting the redox balance and instigating oxidative stress. Lead (Pb) is one of the looming heavy metal which is neither essential nor plays any part in the course of cell metabolism. Pb has toxic effects on plant which may include inhibition of photosynthesis, disruption of mineral nutrition and water balance, and disturbs membrane structure and permeability. Its phytotoxicity can also affect human health and can prove detrimental through food chain. However, in order to combat the effects generated by heavy metal stress particularly by Pb, several amelioratives can be used. Pb phytotoxicity can be ameliorated by the application of certain phytohormones which can be a part of signal transduction pathway, or they may trigger reactions and causative agents to respond to stress. Various signaling molecules such as NO, H2 S, CO, etc. enhance the activity of antioxidant enzymes, level of secondary metabolites and osmolytes, hence scavenge the oxidative stress due to generation of free radicals in response to heavy metal stress

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Glutathione and citric acid modulates lead- and arsenic-induced phytotoxicity and genotoxicity responses in two cultivars of Solanum lycopersicum L.

Cited by 21 publications

References 61 publications

Multi-Component Antioxidative System and Robust Carbohydrate Status, the Essence of Plant Arsenic Tolerance

Multi-Component Antioxidative System and Robust Carbohydrate Status, the Essence of Plant Arsenic Tolerance

Combined Citric Acid and Glutathione Augments Lead (Pb) Stress Tolerance and Phytoremediation of Castorbean through Antioxidant Machinery and Pb Uptake

Lead Uptake, Toxicity and Mitigation Strategies in Plants

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