The Effect of Silicon on the Activity and Isozymes Pattern of Antioxidative Enzymes of Young Maize Roots under Zinc Stress

Šimková, Lenka; Fialová, Ivana; Vaculíková, Miroslava; Luxová, Miroslava

doi:10.1007/s12633-015-9376-6

Cited by 9 publications

(3 citation statements)

References 23 publications

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“…In addition, the inhibited growth of two rice cultivars was observed under a high Zn concentration of 200 mg·kg −1 , but this negative effect was mitigated by the addition of Si ( Table 1 and Figure 1 ). Similar effects were also reported by many researchers in maize [ 9 , 25 , 41 ], except for Bokor et al [ 42 ], who reported that there was no positive effect of Si on excess Zn toxicity in the young maize hybrid under hydroponic conditions.…”

Section: Discussionsupporting

confidence: 88%

Silicon-Mediated Enhancement of Heavy Metal Tolerance in Rice at Different Growth Stages

Huang

Wen

Cai

et al. 2018

IJERPH

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Silicon (Si) plays important roles in alleviating heavy metal stress in rice plants. Here we investigated the physiological response of rice at different growth stages under the silicon-induced mitigation of cadmium (Cd) and zinc (Zn) toxicity. Si treatment increased the dry weight of shoots and roots and reduced the Cd and Zn concentrations in roots, stems, leaves and grains. Under the stress of exposure to Cd and Zn, photosynthetic parameters including the chlorophyll content and chlorophyll fluorescence decreased, while the membrane permeability and malondialdehyde (MDA) increased. Catalase (CAT) and peroxidase (POD) activities increased under heavy metals stress, but superoxide dismutase (SOD) activities decreased. The magnitude of these Cd- and Zn-induced changes was mitigated by Si-addition at different growth stages. The available Cd concentration increased in the soil but significantly decreased in the shoots, which suggested that Si treatment prevents Cd accumulation through internal mechanisms by limiting Cd2+ uptake by the roots. Overall, the phenomena of Si-mediated alleviation of Cd and excess Zn toxicity in two rice cultivars could be due to the limitation of metal uptake and transport, resulting in an improvement in cell membrane integrity, photosynthetic performance and anti-oxidative enzyme activities after Si treatment.

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Section: Discussionsupporting

confidence: 88%

Silicon-Mediated Enhancement of Heavy Metal Tolerance in Rice at Different Growth Stages

Huang

Wen

Cai

et al. 2018

IJERPH

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“…The lowest H/D ratio observed in seedlings treated with Si implied more resistant plants (Araújo Neto et al, 2000). Reduced plant growth has been increasingly observed among Zn toxicity symptoms (Anwaar et al, 2015, Mehrabanjoubani et al, 2015, Mateos-Naranjo et al, 2018, Šimková et al, 2018. Si has shown beneficial effect on the vegetative growth of E. urophylla (Pinto et al, 2009), Z. mays (Paula et al, 2015), G. hirsutum (Anwaar et al, 2015) and O. sativa (Mehrabanjoubani et al, 2015) grown in nutrient solution enriched with zinc.…”

Section: Biometric Characteristicsmentioning

confidence: 99%

The effect of silicon (Si) on the growth and nutritional status of Schizolobium amazonicum seedlings subjected to zinc toxicity

et al. 2020

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Zinc is an essential element to plants. However, excessive zinc levels can severely damage them. Schizolobium amazonicum is an Amazon native species that presents desirable features to remediate environments contaminated with heavy metals. Silicon has the beneficial effect of reducing the toxicity of different contaminants. The aim of the current study is to investigate the effect of Si on the growth and nutritional status of S. amazonicum seedlings subjected to zinc toxicity. The study followed a completely randomized design at 4 x 2 factorial arrangement based on four zinc (1, 150, 300 and 600 μM) and two silicon (0 and 1.5 mM) concentrations with five repetitions for 30 days. Increasing Zn concentrations in the nutrient solution reduced the growth of the plant and Ca, P, Mg, Fe, Mn and Cu contents in plant tissues, increased S concentrations and led to higher toxicity in the roots than shoot of S. amazonicum plants. Si addition to the nutrient solution increased plant growth and the absorption of the evaluated macro and micronutrients. Si increased plant tolerance level from 42.8 to 41.3% at 600 µM Zn, which suggested that this element mitigated the phytotoxic effects of the excess of zinc. Based on the tolerance index, the species presented medium and high tolerance to the evaluated zinc doses. Bioconcentration and translocation factors have indicated the low Zn-phytoextraction capacity of S. amazonicum and suggested that the species may be promising for Zn phytostabilization purposes.

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“…This imbalance of the photosynthetic process causes changes in the redox state that increase the content of ROS and oxidative damage (Mittler, 2002). For protection, plant cells evolved a complex system that involves enzymatic mechanisms consisting of enzymes such as superoxide dismutase (SOD), ascorbate peroxidase (APX) and phenol peroxidase (POX) and non-enzymatic mechanisms consisting of chemical components such as ascorbate (ASC) and glutathione (GSH), which act together in cellular protection (Dinakar, Djilianov, & Bartels, 2012;Šimková, Fialová, Vaculíková & Luxová, 2016). SOD is present in different compartments of the cell and dismutates the superoxide radical (O 2 • -) to hydrogen peroxide (H 2 O 2 ) and water (Bhattacharjee, 2010).…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Protection of Photosynthesis in Two Cashew Progenies Under Salt Stress

Silva¹,

Sousa²,

Santos³

et al. 2018

JAS

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The present work evaluated the indicators of photosynthetic efficiency and antioxidative protection in cashew tree seedlings subjected to salinity stress. The study was conducted with seedlings of two advanced dwarf cashew clones (CCP09 and CCP76) subjected to salt stress with increasing doses of NaCl (0, control; 25; 50; 75; 100 mM) in the nutrient solution for 30 days under greenhouse conditions. The variables of gas exchange, CO2 assimilation (PN), stomatal conductance (gS), transpiration (E), intercellular CO2 concentration (CI), photochemical activity, potential quantum efficiency (Fv/Fm), effective quantum efficiency (ΔF/Fm’) of photosystem II (PSII), photochemical quenching (qP), non-photochemical quenching (NPQ) electron transport rate (ETR) as well as the indicators of damage and oxidative protection were measured. Under these conditions, there was an intense accumulation Na+ associated with a reduction in the K+/Na+ ratio in the leaves of both clones in response to salt, with higher values for this ratio in clone CCP09 than in CCP76 the highest concentration of NaCl (100 mM). Salinity reduced PN, gS and E in the two clones evaluated, with lower reductions in CCP09 than in CCP76 at the highest salt dose. Instantaneous carboxylation (PN/CI) and water use (PN/E) efficiencies were strongly restricted by salinity but were less affected in CCP09 than in CCP76. Salinity stress also increased hydrogen peroxide (H2O2) levels in CCP09, whereas lipid peroxidation decreased in both progenies. The clones presented specific antioxidant responses due to greater enzymatic and non-enzymatic activity in CCP76, in addition to the activity of phenol peroxidase (POX) in CCP09.

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The Effect of Silicon on the Activity and Isozymes Pattern of Antioxidative Enzymes of Young Maize Roots under Zinc Stress

Cited by 9 publications

References 23 publications

Silicon-Mediated Enhancement of Heavy Metal Tolerance in Rice at Different Growth Stages

Silicon-Mediated Enhancement of Heavy Metal Tolerance in Rice at Different Growth Stages

The effect of silicon (Si) on the growth and nutritional status of Schizolobium amazonicum seedlings subjected to zinc toxicity

Antioxidant Protection of Photosynthesis in Two Cashew Progenies Under Salt Stress

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