Mineral nutrition and enzymatic adaptation induced by arsenate and arsenite exposure in lettuce plants

Gusman, Grasielle Soares; Oliveira, Juraci Alves de; Farnese, Fernanda dos Santos; Cambraia, José

doi:10.1016/j.plaphy.2013.08.006

Cited by 87 publications

(43 citation statements)

References 65 publications

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“…Therefore, SOD activity results in increased H 2 O 2 generation and must be accompanied by an increase in the activity of enzymes responsible for scavenging H 2 O 2 , such as CAT and POX. The increase of SOD activity in response to As toxicity observed in this study has also been reported in other plants, such as Lactuca sativa (Gusman et al 2013) and Eichhornia crassipes (Andrade et al 2016). However, when As levels are very high, the extent of the damage caused by the pollutant decreases enzyme activity.…”

Section: Discussionsupporting

confidence: 85%

“…Toxic compounds promote an increase in ROS generation, which results in oxidative damage to biomolecules and subcellular structures (Erinle et al 2016). To prevent these harmful effects, plants develop tolerance mechanisms, such as the activation of enzymatic and non-enzymatic antioxidant systems, which are also indicators of oxidative stress in plants (Brain & Cedergreen 2009;Gusman et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…One of the most damaging eff ects of As in plants is oxidative stress caused by an increase in the production of reactive oxygen species (ROS), which may alter the normal metabolism of plants and damage cell membranes, causing inhibition of photosynthesis and growth (Silveira et al 2015) and eventual cell death (Sharma et al 2012). However, plants have developed mechanisms to mitigate these effects using enzymatic and non-enzymatic antioxidants, such as superoxide dismutase (SOD), peroxidases (POXs) and catalases (Gusman et al 2013), as well as anthocyanins (Srivastava et al 2016) and non-protein thiols (Leão et al 2014b).…”

Section: Introductionmentioning

confidence: 99%

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Phytoremediation of arsenic-contaminated water: the role of antioxidant metabolism of Azolla caroliniana Willd. (Salviniales)

et al. 2017

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Phytoremediation has proven to be an effi cient technology for removing arsenic (As) from water, but the plants used in this process need to be tolerant to the damage caused by As. Th e toxic eff ect of As on growth and functioning of the antioxidant system was studied in individual plants of Azolla caroliniana exposed to fi ve concentrations of As (0.0, 0.25, 0.5, 1.0 and 1.5 mg L -1 ) for the course of fi ve days. Growth, As absorption, enzymatic activity, total and non-protein thiols and anthocyanin content were assessed. Azolla caroliniana was able to take up large amounts of the pollutant, reaching As concentrations of 386.1 µg g -1 dry weight without saturating the absorption mechanism. Th e tolerance index and the growth of A. caroliniana decreased with the increased As uptake. Superoxide dismutase, peroxidases, catalases and glutathione reductase activities increased at lower doses of As and subsequently declined with higher concentrations, whereas ascorbate peroxidase activity was reduced in all treatments. Unlike the enzymatic defence system, anthocyanin and thiol content increased consistently in all treatments and showed a positive correlation with As concentration. Th erefore, the increased synthesis of non-enzymatic antioxidants is most likely the main factor responsible for the high As tolerance of A. caroliniana.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phytoremediation of arsenic-contaminated water: the role of antioxidant metabolism of Azolla caroliniana Willd. (Salviniales)

et al. 2017

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“…Catalase (EC 1.11.1.6) activity was determined using the earlier described method (Gusman et al, 2013). The 0.1 ml of crude enzyme extract were added to 2.9 ml of potassium phosphate buffer, pH 7.0, containing 12.5 mM H 2 O 2 .…”

Section: Methodsmentioning

confidence: 99%

“…The absorbance was measured at 420 nm after 1 min of reaction. The activity was calculated using the molar extinction coefficient 420 nm; έ 2.47 mM -1 cm -1 (Gusman et al, 2013). …”

Section: Methodsmentioning

confidence: 99%

Nanotitania Exposure Causes Alterations in Physiological, Nutritional and Stress Responses in Tomato (Solanum lycopersicum)

et al. 2017

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Titanium dioxide nanoparticles (nanotitania: TiO2NPs) are used in a wide range of consumer products, paints, sunscreens, and cosmetics. The increased applications lead to the subsequent release of nanomaterials in environment that could affect the plant productivity. However, few studies have been performed to determine the overall effects of TiO2NPs on edible crops. We treated tomato plants with 0.5, 1, 2, and 4 g/L TiO2NPs in a hydroponic system for 2 weeks and examined physiological, biochemical, and molecular changes. The dual response was observed on growth and photosynthetic ability of plants depending on TiO2NPs concentrations. Low concentrations (0.5–2 g/L) of TiO2NPs boosted growth by approximately 50% and caused significant increase in photosynthetic parameters such as quantum yield, performance index, and total chlorophyll content as well as induced expression of PSI gene with respect to untreated plants. The high concentration (4 g/L) affected these parameters in negative manner. The catalase and peroxidase activities were also elevated in the exposed plants in a dose-dependent manner. Likewise, exposed plants exhibited increased expressions of glutathione synthase and glutathione S-transferase (nearly threefold increase in both roots and leaves), indicating a promising role of thiols in detoxification of TiO2NPs in tomato. The elemental analysis of tissues performed at 0.5, 1, and 2 g/L TiO2NPs indicates that TiO2NPs transport significantly affected the distribution of essential elements (P, S, Mg, and Fe) in roots and leaves displaying about threefold increases in P and 25% decrease in Fe contents. This study presents the mechanistic basis for the differential responses of titanium nanoparticles in tomato, and calls for a cautious approach for the application of nanomaterials in agriculture. GRAPHICAL ABSTRACTMovement of nanotitania in plant tissues.

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Arsenic‐Induced Responses in Plants

et al. 2022

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Mineral nutrition and enzymatic adaptation induced by arsenate and arsenite exposure in lettuce plants

Cited by 87 publications

References 65 publications

Phytoremediation of arsenic-contaminated water: the role of antioxidant metabolism of Azolla caroliniana Willd. (Salviniales)

Phytoremediation of arsenic-contaminated water: the role of antioxidant metabolism of Azolla caroliniana Willd. (Salviniales)

Nanotitania Exposure Causes Alterations in Physiological, Nutritional and Stress Responses in Tomato (Solanum lycopersicum)

Arsenic‐Induced Responses in Plants

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