Mechanisms of Enhanced Heavy Metal Tolerance in Plants by Silicon: A Review

Wu, Jiawen; Shi, Yu; Zhu, Yong‐Guan; Wang, Yichao; Gong, Haijun

doi:10.1016/s1002-0160(13)60073-9

Cited by 168 publications

(72 citation statements)

References 91 publications

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“…5.12 The pathway analysis of photosynthesis ( a and c ) and photosynthesis-antenna proteins ( b and d ) of Zn-sensitive rice cultivar grown hydroponically with either normal (0.15 μM) or high (2 mM) Zn with (1.5 mM) or without Si for 72 h through high-throughput sequencing (From Song et al 2014 ) involved in regulating the expression of genes responsible for many plant metabolic processes, especially under heavy metal stress conditions. Based on the current information in the literature (Epstein 1994(Epstein , 1999Ma 2001 ;Liang et al 2007 ;Wu et al 2013 ), a schematic diagram of action model of Si-mediated alleviation of metal stress in plants is summarized in Fig. 5.13 .…”

Section: Discussionmentioning

confidence: 99%

“…It seems that more direct and convincing evidence needs to be accumulated to uncover the mechanisms of Si effects on plant resistance to heavy metals at a transcriptional or proteomic level. It may be interesting to investigate whether Si is involved in stimulating the effl ux and inhibiting the infl ux of heavy metals in plasma membranes under heavy metal stress (Wu et al 2013 ).…”

Section: Molecular Aspects Of Si-mediated Metal Resistancementioning

confidence: 99%

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Silicon-Mediated Tolerance to Metal Toxicity

Liang

Nikolić

Bélanger

et al. 2015

Silicon in Agriculture

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Silicon (Si) has been well documented to mitigate phytotoxicity of metals including manganese (Mn), iron (Fe), aluminium (Al), cadmium (Cd), arsenic (As), chromium (Cr), lead (Pb), copper (Cu) and zinc (Zn). However, the mechanisms explaining this phenomenon are still not clear. In general, there are two mechanisms, i.e. an external ( ex planta ) and an internal ( in planta ) one, proposed for explaining why and how Si can regulate plant resistance and/or tolerance to metal toxicity. Among the interactions of Si with metals, the possible roles of Si in enhancing tolerance to Mn and Al have been most extensively investigated, while over the last decade more work has been done on the Si-mediated alleviation of toxicity of the most important heavy metals, i.e. Cd, As, Cr and Pb. Nevertheless, direct evidence is still lacking that can clearly dissect the mechanisms involved in Si-mediated tolerance against metal toxicity, especially at the molecular level.

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Section: Discussionmentioning

confidence: 99%

Section: Molecular Aspects Of Si-mediated Metal Resistancementioning

confidence: 99%

Silicon-Mediated Tolerance to Metal Toxicity

Liang

Nikolić

Bélanger

et al. 2015

Silicon in Agriculture

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“…Heavy metal pollution is increasing rapidly due to excessive emission of industrial waste, wastewater irrigation, unreasonable pesticides and plastic sheeting (Wu et al, 2013). Though metal concentrations are increasing in soil and water, still there is a shortage of essential metals since they are found in unusable form for plants.…”

Section: Heavy Metals Tolerancesmentioning

confidence: 99%

“…Though metal concentrations are increasing in soil and water, still there is a shortage of essential metals since they are found in unusable form for plants. Excess heavy metals in plant cells result lipid peroxidation (membrane deterioration), altered ion homeostasis and generation of ROS (Choe et al, 2013;Yadav, 2010) and adversely affected gene expression and slow photosynthesis (Wu et al, 2013). Heavy metal accumulation in plants is especially dangerous besides crop productivity reduction since it allows heavy metal contamination to food chains (Ovecka and Takac, 2014;Wu et al, 2013).…”

Section: Heavy Metals Tolerancesmentioning

confidence: 99%

Current trends in genetic manipulations to enhance abiotic and biotic stresses in tobacco

Tesfaw¹,

Feyissa²

2014

Afr. J. Biotechnol.

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Environmental stresses, both abiotic and biotic, are the main factors reducing crops productivity. Biotic stresses caused by fungi, viruses, bacteria and insects are the major threats. However, abiotic stresses have more adverse effects on crop yield and crop survival. Hitherto, tolerant plants were mainly produced by classical breeding techniques. Success in breeding for better adapted varieties to abiotic and biotic stresses depends on the concerted efforts of various research domains including plant and cell physiology, molecular biology, genetics and breeding. However, such process is time consuming. The production of transgenic plants by genetic engineering allows a much faster progress. This review focuses on stress tolerance on tobacco. Tolerance to salt, drought, water stress, low and high temperature, heavy metals, pathogens and pests were enhanced via overexpression of specific stress related genes from different sources.

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“…O Si é benéfico às plantas por garantir a proteção contra múltiplos fatores bióticos e abióticos (MA, 2004). Entre os efeitos benéficos do Si estão a maior resistência ao estresse hídrico (LIANG et al, 2007), às doenças (RESENDE et al, 2009;ARSENAULT-LABRECQUE et al, 2012;RESENDE et al, 2013), às pragas (KORNDÖRFER et al, 2011;KEEPING et al, 2013;DIAS et al, 2014) e maior tolerância aos metais pesados que prejudicam o desenvolvimento das plantas (WU et al, 2013;KIM et al, 2014;PONTIGO et al, 2015).…”

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Absorção De Silício Pelo Sorgo Em Neossolo Quartzarênico Adubado Com Sílica

Oliveira¹,

Canuto²

2016

Encicl. Biosf.

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RESUMOA pesquisa com adubação silicatada geralmente é realizada com fontes de silício (Si) que apresentam outros nutrientes em sua composição e que alteram o pH do solo, dificultando o estudo do efeito isolado deste nutriente em plantas. A sílica é uma fonte que apresenta apenas o Si. Os objetivos do presente trabalho foram avaliar a absorção desse elemento pelas plantas de sorgo em função da adubação silicatada e verificar a influência no pH do solo. Os experimentos foram conduzidos em Neossolo Quartzarênico Órtico típico, em delineamento de blocos casualizados com quatro níveis de Si (0, 300, 600 e 1000 kg ha -1 ) e cinco repetições. Aos 30 dias após a emergência do sorgo foram avaliadas a quantidade de Si no solo e na parte aérea do sorgo, além do pH do solo. A adubação com sílica não alterou o pH do solo. A quantidade de Si no solo e na planta aumentou linearmente com as doses aplicadas. Portanto, a sílica pode ser usada na avaliação dos efeitos exclusivos do Si em plantas de sorgo porque as plantas respondem a essa fonte, a qual não altera o pH solo. PALAVRAS-CHAVE: adubação silicatada, nutrição de plantas, Sorghum bicolor SILICON UPTAKE BY SORGHUM IN A TYPIC QUARTZARENIC NEOSOLFERTILIZED WITH SILICA ABSTRACT Research with silicon fertilization is usually carried out with sources of silicon (Si) having other nutrients in its composition which changes the pH of the soil, making it difficult to study the effect of isolated plant nutrient. Silica is a source that presents only the Si. The objectives of this study were to evaluate the absorption of this element by sorghum plants depending on silicon fertilization and the influence on soil pH. The experiments were conducted in Quartzipsamment soil in a randomized block design with four levels of Si (0, 300, 600 and 1000 kg ha ) and five repetitions. At 30 days after emergence of sorghum were evaluated the amount of Si in soil and shoots of sorghum, in addition to soil pH. Fertilization with silica did not change the soil pH. The amount of Si in soil and plant increased linearly with the applied levels. Therefore, silica can be used in the assessment of unique effects of Si on sorghum plants because plants respond to this source, which does not alter the soil pH.

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Mechanisms of Enhanced Heavy Metal Tolerance in Plants by Silicon: A Review

Cited by 168 publications

References 91 publications

Silicon-Mediated Tolerance to Metal Toxicity

Silicon-Mediated Tolerance to Metal Toxicity

Current trends in genetic manipulations to enhance abiotic and biotic stresses in tobacco

Absorção De Silício Pelo Sorgo Em Neossolo Quartzarênico Adubado Com Sílica

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