Silicon mitigates heavy metal stress by regulating P-type heavy metal ATPases, Oryza sativalow silicon genes, and endogenous phytohormones

Kim, Yoon-Ha; Khan, Abdul Latif; Kim, Duk-Hwan; Lee, Seung‐Yeol; Kim, Kyung–Min; Waqas, Muhammad; Jung, Hee‐Young; Shin, Jae‐Ho; Kim, Jong-Guk; Lee, In‐Jung

doi:10.1186/1471-2229-14-13

Cited by 357 publications

(182 citation statements)

References 69 publications

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“…The accumulated silicon in rice leaves improves photomorphogenesis, which in turn, increases the photosynthetic rate and also strengthens the cuticle membranes. The provision of additional Si to the rice plant promotes growth parameters such as length, weight, and chlorophyll contents (Kim et al 2014a). Similar effects have also been reported in soybeans, cotton, poinsettia, wheat, maize, rice, sorghum cucumber, and tomatoes (Li et al 1989;McAvoy and Bible 1996;Gong et al 2005;Hattori et al 2005;Liang et al 2005;Feng et al 2009;Hamayun et al 2010;Kim et al 2011;Kim et al 2014b, c).…”

mentioning

confidence: 49%

“…Si is a major constituent of many plants, but is not generally classified as 'essential'; although Si is regarded as an essential element in a number of species of the Poaceae and Cyperaceae, it has not been possible to demonstrate that it is essential to all higher plants because direct evidence is still lacking (Epstein 1994;1999;Liang et al 2007). Previous research has reported that exogenous Si can increase plant tolerance to high manganese concentrations (Horst and Marschner 1978), drought (Lux et al 2002), heavy-metal contamination (Neumann and zur Nieden 2001;Kim et al 2014a), and resistance to pests and pathogens (Belanger et al 2003;Liang et al 2007;Richmond and Sussman, 2003). Furthermore, Si contributes to stress resistance in other crops such as the cucumber (Zhu et al 2004), soybean (Hamayun et al 2010), tomato (Heine et al 2007), and wheat (Gong et al 2005).…”

Section: Discussionmentioning

confidence: 99%

“…This α-linoleic acid is a major component of plant membranes and is a precursor of the phytohormone jasmonic acid (Weber et al 2004;Wasternack et al 2006;Kim et al 2014a). MDA activity is often used as an indicator of the stress perceived by plant cell and the level of damage due to abiotic stress.…”

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confidence: 99%

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Silicon-mediated mitigation of wounding stress acts by up-regulating the rice antioxidant system

Kim

Khan

Waqas

et al. 2016

Cereal Research Communications

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Silicon (Si) is essential for normal growth and development in plants and is also beneficial for their responses to wounding. However, the mechanisms by which Si acts to mitigate the effects of wounding is not fully understood. This effect possibly occurs through a reduction in the oxidative stresses associated with wounding. Here, we tested this possibility by investigating the effects of applying different concentrations of Si (0,5 and 1,0 mM) to rice plants under wounding stress for a period of 6 and 12 h. We found that a higher uptake of Si was signifiacntly associated with an increase in leaf chlorophyll contet. In response to wounding induced oxidative stress, the extent of lipid bilayer peroxidation was reduced in a dose-dependent manner by Si application for 6 or 12 h. Activity of the catalase enzyme was initially lowered by Si treatment; however, at 1.0 mM Si, catalase activity increased significantly after 12h of wounding stress. A similar response was also observed for a peroxidase enzyme. Polyphenol oxidase showed a significant reduction in activity. We conclude that Si application does not only improve leaf chlorophyll content but can also overcome the oxidative stress due wounds or physical injuries.

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confidence: 49%

Section: Discussionmentioning

confidence: 99%

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Silicon-mediated mitigation of wounding stress acts by up-regulating the rice antioxidant system

Kim

Khan

Waqas

et al. 2016

Cereal Research Communications

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“…Evidence has suggested that silicon (Si) fertilizers are effective in reducing the concentration of Cd (Shi et al 2005;Kim et al 2014) or As in rice grain (Guo et al 2007;Seyfferth and Fendorf 2012). Various Si compounds, such as K 2 SiO 3 and silica gel, were chosen as Si fertilizers for hydroponic culture or pot experiments to mitigate Cd or As individually in rice shoots (Zhang et al 2008;Putwattana et al 2010;Marmiroli et al 2014).…”

Section: Responsible Editor: Elena Maestrimentioning

confidence: 99%

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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“…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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Silicon mitigates heavy metal stress by regulating P-type heavy metal ATPases, Oryza sativalow silicon genes, and endogenous phytohormones

Cited by 357 publications

References 69 publications

Silicon-mediated mitigation of wounding stress acts by up-regulating the rice antioxidant system

Silicon-mediated mitigation of wounding stress acts by up-regulating the rice antioxidant system

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

Absorção De Silício Pelo Sorgo Em Neossolo Quartzarênico Adubado Com Sílica

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