New insights into cadmium stressful-conditions: Role of ethylene on selenium-mediated antioxidant enzymes

Alves, Letícia Rodrigues; Reis, André Rodrigues dos; Prado, Emilaine Rocha; Lavres, José; Pompeu, Geórgia Bertoni; Azevedo, Ricardo Antunes; Gratão, Priscila Lupino

doi:10.1016/j.ecoenv.2019.109747

Cited by 38 publications

(9 citation statements)

References 77 publications

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“…The heavy metal Cd is easily transferred from soil to plants under Cd stress. Studies have reported that the use of inorganic Se decreased Cd uptake in tomato [ 21 ], pakchoi [ 30 ], wheat [ 31 ], and other plants [ 10 , 32 ]. In this study, the addition of Nano-Se, Se (IV), and SeMet significantly reduced the Cd content in rice tissues (shoots and roots), and this effect was pronounced with the SeMet application.…”

Section: Discussionmentioning

confidence: 99%

“…Similarly, Yu et al [ 30 ] reported that Se (IV) reduced Cd content in the shoots of pakchoi, while Se (VI) increased. Alves et al [ 21 ] reported that both Se (IV) and Se (VI) reduced Cd uptake in tomato ( Solanum lycopersicum L.). These results suggest that the specific effect depends on Cd dosage and plant species as well as Se species.…”

Section: Discussionmentioning

confidence: 99%

“…Heavy metals exert toxic effects on plants through the generation of free radicals, such as superoxide radical (O 2− ), hydrogen peroxide (H 2 O 2 ), and hydroxyl radical (OH), called reactive oxygen species (ROS). ROS initiate the peroxidation and destruction of the lipid bilayer that lead to irreparable metabolic dysfunction and cell death [ 21 ]. In our study, Cd increased the MDA level in rice roots ( Figure 5 ), probably due to increase lipid peroxidation caused by Cd-induced oxidative stress.…”

Section: Discussionmentioning

confidence: 99%

“…Fresh leaves (0.2 g) were added to a tube containing 2 mL of 100% acetone. After shaking for 24 h at 4 °C, the absorbance was read at 645 nm and 663 nm using a spectrophotometer to determine chlorophyll content [ 21 ].…”

Section: Methodsmentioning

confidence: 99%

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Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Yan

Qin

et al. 2020

IJERPH

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Cadmium (Cd) is a pollutant toxic to plants and a potential threat to human health. Selenium (Se), though not essential for plants, has beneficial effects on plants under abiotic stress. A hydroponic experiment was conducted to investigate the impact of different forms of Se (Nano-Se, selenite, selenate, and SeMet) on accumulation, subcellular distribution, and chemical forms of Cd, as well as oxidative stress in rice seedlings. Cd (20 μmol·L−1) treatment significantly decreased biomass accumulation and chlorophyll content. The application of all Se forms, except selenate, mitigated the adverse effects of Cd on growth and chlorophyll content. The application of selenite, Nano-Se, and SeMet decreased root and shoot Cd concentrations as well as root-to-shoot Cd translocation in rice seedlings. Selenate application decreased shoot Cd concentration and root-to-shoot Cd translocation with no effect on root Cd concentration. Accordingly, Se increased the sequestration of Cd in the cell wall and vacuoles and decreased the active chemical form of Cd in rice seedlings. SeMet was the most effective supplement that decreased Cd concentration and enhanced Se concentration in the roots and shoots of rice seedlings. All forms of Se further enhanced catalase (CAT) and glutathione peroxidase (GSH-Px) activities and inhibited MDA accumulation. To conclude, Se influenced Cd accumulation and translocation in rice seedlings by altering the subcellular distribution, chemical forms, and antioxidant defense system under Cd stress. These effects were highly significant with SeMet treatment, probably due to better absorption and utilization by the plant.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Yan

Qin

et al. 2020

IJERPH

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“…ET application (as ethephon) to Zn-stressed plants restored photosynthesis and growth of mustard plants by decreasing oxidative stress via augmenting antioxidant activity, the metabolism of proline, glyoxalase system, and optimum nutrient homoeostasis [89]. In tomato plants, Alves et al [90] provided new insights into the interactive role of ET on selenium-mediated antioxidant enzymes under Cd stress. Overall, the results suggested that cross talk of ET with Se manipulated the ET regulated expression of genes to induce Cd tolerance.…”

Section: Role Of Ethylenementioning

confidence: 99%

Abiotic Stress Tolerance in Crop Plants: Role of Phytohormones

Alhaithloul¹,

Abu-Elsaoud²,

Soliman³

2021

Abiotic Stress in Plants

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Crop plants are encountered by various abiotic pressures which limit their growth and development. Stresses such as drought, heat, pathogen attack, heavy metal, salinity, and radiations impose negative effect on crop plants. The reduction in crop productivity in the current era of climate change is compromising the efforts/strategies used for sustainable agricultural practices. Therefore, plant stress physiologists are engineering plants with suitable exogenous signaling elicitors to engineer tolerance to various stresses. In the present chapter, an appraisal has been made in the "Introduction" section to first assess the damages caused by various abiotic stresses in crop plants. In the second section, we attempt to summarize the role of various plant hormones, namely, salicylic acid (SA), brassinosteroids (BRs), ethylene (ET), and methyl jasmonate (MJ) in enhancing abiotic stress tolerance. The current concept may lead to the development of strategies for unraveling the underlying mechanisms of plant hormone-mediated abiotic stress tolerance in crop plants.

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