Silicon and heavy metal tolerance of higher plants

Neumann, D.; Nieden, Uta zur

doi:10.1016/s0031-9422(00)00472-6

Cited by 300 publications

(149 citation statements)

References 26 publications

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“…Also, Si is the second most abundant element on the surface of the earth. It is not considered to be an essential element for higher plant ( Neumann et al, 2001). Si can be classified as beneficial element (Epstein, 2005).…”

Section: Introductionmentioning

confidence: 99%

Utilization of Silicon Fertilizer Application on Pepper Seedling Production

Sukkaew¹,

Amkha²,

Inboonchoy³

et al. 2016

MAS

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The purpose of this research was study the rate and application method of calcium silicate (Ca 2 SiO 4 ) fertilizer appropriated for pepper seedling production. This study was divided into two experiments. Experiment 1, the effect of Ca 2 SiO 4 fertilizer application in pepper seedling by mixed in growing media was arranged in 2x6 factorials in Completely Randomized Design (CRD) with 4 replications. Factor A was seed preparation methods (seed primed with Ca 2 SiO 4 fertilizer at a rate 2 g L -1 and non-seed primed) and factor B was application rates of Ca 2 SiO 4 fertilizer at 0, 30, 60, 120, 240 and 480 kg ha -1 . Experiment 2, the effect of Ca 2 SiO 4 fertilizer application in pepper seedling by foliar method was arranged in 2x6 factorials in CRD with 4 replications. Factor A was seed preparation methods and factor B was application rates of Ca 2 SiO 4 fertilizer at 0, 2, 4, 6, 8 and 10 g L -1 . All experiments data were collected such as plant growth and total silicon content in plant at 28 days after sowing (DAS). From experiment 1, the results showed that seed primed with Ca 2 SiO 4 fertilizer application at a rate 120 kg ha -1 gave the good plant growth and total silicon in plant. Experiment 2, the results showed that seed primed with Ca 2 SiO 4 fertilizer application at a rate 2 g L -1 gave the highest of plant growth and total silicon in plant. To conclude, Ca 2 SiO 4 fertilizer application can be employed for enhancing plant growth of pepper seedling and increasing silicon content in plant.

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Section: Introductionmentioning

confidence: 99%

Utilization of Silicon Fertilizer Application on Pepper Seedling Production

Sukkaew¹,

Amkha²,

Inboonchoy³

et al. 2016

MAS

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“…It also contributes to the co-precipitation of Si-metal complexes in the cell wall, compartmentalization of metals bound to organic acids in the vacuole (Neumann and Nieden, 2001), more homogeneous distribution of metals, formation of Si-polyphenol complexes in tissues (Maksimovic et al, 2007), and reduced lipid peroxidation in the membrane, via stimulation of enzymatic and non-enzymatic antioxidants (Shi et al, 2005b). Silicon is linked to lower As translocation to rice straw and grains (Ali et al, 2009), with proven benefits in food safety.…”

Section: Introductionmentioning

confidence: 99%

Effects of Silicon on Alleviating Arsenic Toxicity in Maize Plants

Silva

Nascimento

Neto

et al. 2015

Rev. Bras. Ciênc. Solo

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Arsenic is a metalloid highly toxic to plants and animals, causing reduced plant growth and various health problems for humans and animals. Silicon, however, has excelled in alleviating stress caused by toxic elements in plants. The aim of this study was to investigate the effects of Si in alleviating As stress in maize plants grown in a nutrient solution and evaluate the potential of the spectral emission parameters and the red fluorescence (Fr) and far-red fluorescence (FFr) ratio obtained in analysis of chlorophyll fluorescence in determination of this interaction. An experiment was carried out in a nutrient solution containing a toxic rate of As (68 μmol L -1 ) and six increasing rates of Si (0, 0.25, 0.5, 1.0, 1.5, and 2.0 mmol L -1 ). Dry matter production and concentrations of As, Si, and photosynthetic pigments were then evaluated. Chlorophyll fluorescence was also measured throughout plant growth. Si has positive effects in alleviating As stress in maize plants, evidenced by the increase in photosynthetic pigments. Silicon application resulted in higher As levels in plant tissue; therefore, using Si for soil phytoremediation may be a promising choice. Chlorophyll fluorescence analysis proved to be a sensitive tool, and it can be successfully used in the study of the ameliorating effects of Si in plant protection, with the Fr/FFr ratio as the variable recommended for identification of temporal changes in plants.

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“…* indicates significant mean differences in data group by Krushal-Wallis test and means followed by different letters indicate significant differences between treatments by Tukey or t-test part of the Zn tolerance mechanism in this species. 6 Considering those previous reports on Si-metal interactions seemed to be interesting to make a preliminary study on the composition of phytoliths in E. andevalensis. The leaf phytoliths obtained in the present work presented Si-Cu associations probably forming Cu-silicates, but if such Cu sequestration has any role in reducing the Cu toxicity requires a detailed quantitative study.…”

Section: Discussionmentioning

confidence: 97%

Effects of silicon on copper toxicity in Erica andevalensis Cabezudo and Rivera: a potential species to remediate contaminated soils

2011

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The influence of silicon on responses to copper excess was studied in plants of Erica andevalensis. Plantlets were grown in nutrient solutions containing two Cu (1 and 500 mM) and three Si concentrations (0, 0.5 and 1 mM). Plant growth, water content, and mineral nutrient concentration were determined. Plants grown with 500 mM Cu showed differences in growth and shoot water content depending on Si supply. The addition of 1 mM Si in high-Cu nutrient solutions significantly improved plant growth and reduced water loss preventing plant death related to Cu-excess. Silicon supply reduced significantly leaf Cu concentration (up to 32%) and increased Cu concentration in roots. Phytoliths isolated from leaves were analysed by scanning electron microscopy coupled with energydispersive X-ray spectroscopy. Such phytoliths consisted in silica deposits associated with Cu and other elements (K, Ca, P). Improvement by Si of Cu tolerance in E. andevalensis was clearly related to the inhibition of Cu upward transport. The leaf phytoliths formed in Si-treated plants might have some contribution to tolerance by Cu immobilisation and inactivation.

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Silicon and heavy metal tolerance of higher plants

Cited by 300 publications

References 26 publications

Utilization of Silicon Fertilizer Application on Pepper Seedling Production

Utilization of Silicon Fertilizer Application on Pepper Seedling Production

Effects of Silicon on Alleviating Arsenic Toxicity in Maize Plants

Effects of silicon on copper toxicity in Erica andevalensis Cabezudo and Rivera: a potential species to remediate contaminated soils

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