Silicon Effects on Metal Tolerance and Structural Changes in Maize (Zea mays L.) Grown on a Cadmium and Zinc Enriched Soil

Cunha, Karina Patrícia Vieira da; Nascimento, Clístenes Williams Araújo do

doi:10.1007/s11270-008-9814-9

Cited by 208 publications

(72 citation statements)

References 24 publications

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“…Neither grain yield nor straw biomass were significantly increased following treatments with Si fertilizers in our experiment when compared with the NPK treatment, although it is well known that Si fertilizers can promote plant growth which has been observed in many plants, including peanut, maize, and cucumber (Zhu et al 2004;Da Cunha and Do Nascimento 2009;Shi et al 2010). This may be because not enough available Si was added to the soil to significantly influence grain yield and straw biomass or the amount of available Si in the soil is already high enough for rice growth.…”

Section: Plant Growth and Biomasscontrasting

confidence: 56%

Mitigation of cadmium and arsenic in rice grain by applying different silicon fertilizers in contaminated fields

Wang

Wen

Chen

et al. 2015

Environ Sci Pollut Res

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A field experiment was established to support the hypothesis that application of different silicon (Si) fertilizers can simultaneously reduce cadmium (Cd) and arsenic (As) concentration in rice grain. The Bsemi-finished product of Si-potash fertilizer^treatment at the high application of 9000 kg/ha (NP+S-KSi9000) significantly reduced the As concentration in rice grain by up to 20.1 %, compared with the control. Si fertilization reduces the Cd concentration in rice considerably more than the As concentration. All Si fertilizers apart from sodium metasilicate (Na 2 SiO 3 ) exhibited a high ability to reduce Cd concentration in rice grain. The Sicalcium (CaSi) fertilizer is the most effective in the mitigation of Cd concentration in rice grain. The CaSi fertilizer applied at 9000 kg/ha (NPK+CaSi9000) and 900 kg/ha (NPK+CaSi900) reduced the Cd concentration in rice grain about 71.5 and 48.0 %, respectively, while the Si-potash fertilizer at 900 kg/ ha (NP+KSi900), the semi-finished product of Si-potash fertilizer at both 900 kg/ha (NP+S-KSi900) and 9000 kg/ha (NP+S-KSi9000), and the rice straw (NPK+RS) treatments reduced the Cd concentration in rice grain about 42, 26.5, 40.7, and 23.1 %, respectively. The results of this investigation demonstrated the potential effects of Si fertilizers in reducing Cd and As concentrations in rice grain.

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Section: Plant Growth and Biomasscontrasting

confidence: 56%

Mitigation of cadmium and arsenic in rice grain by applying different silicon fertilizers in contaminated fields

Wang

Wen

Chen

et al. 2015

Environ Sci Pollut Res

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“…Silicon treatment did not significantly influence Zn accumulation in sorghum roots and shoots. It was reported that the maize plants treated with Si presented not only biomass increase, but also higher metal (Cd, Zn) accumulation (Cunha & Nascimento 2009). Silicon supply significantly decreased Zn concentration in shoots of rice cultivars, indicating lower root to shoot translocation of Zn.…”

Section: Discussionmentioning

confidence: 99%

“…However, Zn toxicity occurs in soils contaminated by mining and smelting activities, in agricultural soils treated with sewage sludge, and in urban and peri-urban soils enriched by anthropogenic inputs of Zn, especially in low-pH soils (Chaney 1993). Silicon was recorded as an effective element for alleviation of Zn toxicity in some plant species (Cunha & Nascimento 2009;Kaya et al 2009;Song et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Effect of silicon application on Sorghum bicolor exposed to toxic concentration of zinc

et al. 2012

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The aim of this study was to determine the effect of exogenously applied Si on the growth and physiological parameters of sorghum [Sorghum bicolor (L.) Moench] cultivated in hydroponics with elevated zinc concentrations (75 µM and 150 µM Zn). Increased concentrations of Zn inhibited root growth and biomass production of roots and shoots. Application of Si individually showed a positive effect on root growth but negatively affected production of fresh and dry biomass of roots and shoots. On the other hand, silicon in combination with Zn significantly reduced the inhibitory effect of Zn on root growth but did not positively affect biomass production of roots and shoots. Accumulation of Zn in plant tissues increased with increasing Zn concentration in nutrient solution, but application of Si in combination with Zn did not significantly influence Zn accumulation in roots. Completely opposite results were found in Si accumulation in roots treated with Si in combination with Zn. Interaction of these ions resulted in considerable increase of Si accumulation in roots which almost doubled in comparison to individal Si treatment. Impact of Zn on the activity of some antioxidant enzymes was equivocal and differences were observed also between two Zn concentrations. Individual application of Si resulted in significant increase in the activity of all studied antioxidant enzymes but Si in combination with Zn mostly negatively affected their activity except the activity of catalase (CAT) which was the highest in roots grown in solution containing both Si and Zn ions. Comparing all obtained data we can assume that Si applied in combination with Zn did not significantly alleviate Zn toxicity in young sorghum except the growth of primary seminal root and further experiments are required for better understanding of their interaction.

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“…Cunha and Nascimento (2008) found that Si increased the thickness of the adaxial epidermis of corn leaves. In that case, the epidermis was possibly thickened by the deposition of Si in the form of hydrated amorphous silica (SiO 2 .nH 2 O) in epidermal cells.…”

Section: Resultsmentioning

confidence: 98%

Leaf anatomy and gas exchange of ornamental sunflower in response to silicon application

Júnior¹,

Venegas²,

Fontes³

et al. 2017

Biosci. J.

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Silicon applied to substrate for greenhouse cultivation of ornamental pot plants can improve the yield and quality of the ornamental product; however, the possible anatomical and physiological changes caused by Si have to be assessed. Therefore, the objective of this study was to evaluate gas exchange rates and leaf anatomy of ornamental sunflower 'Sunbright' grown on a substrate amended with Si. The experiment was conducted in a greenhouse, and the treatments consisted of sunflower plants cultivated in pots containing 600 g substrate fertilized with Si at rates of 0, 0.25, 0.50, 0.75, and 1.00 g kg -1 . The treatments were arranged in randomized complete block design and four replications. Samples from the middle region of leaf blades in the sixth pair from the apex were collected and analyzed morphometrically. Epidermal trichomes were analyzed using diaphanization and scanning electron microscopy with energy-dispersive X-ray spectroscopy. The following traits were determined: leaf blade thickness, palisade and spongy parenchyma thickness, mesophyll thickness, and abaxial and adaxial epidermis thickness. Net photosynthesis, stomatal conductance and transpiration rates were determined in the fifth leaf at the beginning of the flowering stage by an infrared gas analyzer. The data were subjected to ANOVA and regression analyses. The results indicate that the ornamental sunflower 'Sunbright' accumulates Si in leaf trichomes, and that leaf thickness is not affected by Si application to the substrate; however, transpiration rates decrease while net photosynthesis rate and stomatal conductance increase in response to Si application.

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Silicon Effects on Metal Tolerance and Structural Changes in Maize (Zea mays L.) Grown on a Cadmium and Zinc Enriched Soil

Cited by 208 publications

References 24 publications

Mitigation of cadmium and arsenic in rice grain by applying different silicon fertilizers in contaminated fields

Mitigation of cadmium and arsenic in rice grain by applying different silicon fertilizers in contaminated fields

Effect of silicon application on Sorghum bicolor exposed to toxic concentration of zinc

Leaf anatomy and gas exchange of ornamental sunflower in response to silicon application

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