The Effect of Silicon on Photosynthesis and Expression of Its Relevant Genes in Rice (Oryza sativa L.) under High-Zinc Stress

Song, Alin; Li, Ping; Fan, Fenliang; Li, Zhaojun; Liang, Yongchao

doi:10.1371/journal.pone.0113782

Cited by 184 publications

(130 citation statements)

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“…In addition, the protective action of Si was observed in Oryza sativa under high levels of zinc (Zn) (Song et al 2014), Hordeum vulgare under high concentrations of chromium (Cr) and Cucumis sativus exposed to manganese (Mn) toxicity (Shi et al 2005).The tolerance to metal toxicity can be induced by the compartmentalization, chelation and/or immobilization of metal ions into the vacuole, cytoplasm, apoplast or/and cell wall. In addition, Britez et al (2002) described that Si decreased Al toxicity due to the formation of Al-Si complexes in the apoplast, which are non-toxic forms.…”

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confidence: 99%

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Silicon mitigates oxidative stress and has positive effects in Eucalyptus platyphylla under aluminium toxicity

Lima¹,

Júnior²,

Barbosa³

et al. 2016

PLANT SOIL ENVIRON

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Positive interactions to silicon (Si) were reported in Solanum nigrum plants (Liu et al. 2013) exposed to toxic cadmium (Cd) levels, while Kidd et al. (2001) also described that Si mitigates the toxicity by aluminium (Al) in Zea mays. In addition, the protective action of Si was observed in Oryza sativa under high levels of zinc (Zn) (Song et al. 2014), Hordeum vulgare under high concentrations of chromium (Cr) and Cucumis sativus exposed to manganese (Mn) toxicity (Shi et al. 2005).The tolerance to metal toxicity can be induced by the compartmentalization, chelation and/or immobilization of metal ions into the vacuole, cytoplasm, apoplast or/and cell wall. In addition, Britez et al. (2002) described that Si decreased Al toxicity due to the formation of Al-Si complexes in the apoplast, which are non-toxic forms. Based on this overview, our hypothesis is that Si must reduce the negative impacts on metabolism provoked by the action of Al in Eucalyptus platyphylla plants. The aim of this research is to determine the Si contribution on nutrient concentrations, compounds linked to oxidative stress, photosynthetic pigments and gas exchange, and determine if Si can improve the tolerance mechanism of young E. platyphylla plants exposed to Al toxicity. MATERIAL AND METHODS Plants ABSTRACTThe tolerance to metal toxicity, such as aluminium, can be induced by the formation of Al-Si complexes. Therefore, the aim of this research is to determine the contribution of Si on nutrient concentrations, compounds linked to oxidative stress, photosynthetic pigments and gas exchange and to determine if Si can improve the tolerance mechanism of young Eucalyptus platyphylla plants exposed to Al toxicity. The experimental setup was completely randomized with four treatments (0, 1.6 mmol/L Al, 2.0 mmol/L Si and 1.6 mmol/L Al + 2.0 mmol/L Si; being described as the control, Al toxicity, Si and Al toxicity + Si, respectively). The treatment with Si attenuated the negative effects of Al on nutrient concentrations by reducing superoxide, hydrogen peroxide, malondialdehyde and electrolyte leakage. Pigments and gas exchange exhibited beneficial effects after Si application, with positive interactions also being detected between Si-Al. Therefore, this study demonstrates that Si reduced the oxidative stress and improved the tolerance mechanism of young E. platyphylla plants exposed to Al toxicity.

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confidence: 99%

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confidence: 99%

Silicon mitigates oxidative stress and has positive effects in Eucalyptus platyphylla under aluminium toxicity

Lima¹,

Júnior²,

Barbosa³

et al. 2016

PLANT SOIL ENVIRON

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“…2D), especially with the incorporation of Si in the nutrient solution. The addition of Si could protect the photosynthetic pigments in leaves, alleviating the damage to chloroplast ultrastructure, and increasing the expression of genes associated with photosynthesis (Song et al, 2014). The silicon, after being absorbed as monossilicic acid, is accumulated in the abaxial region of the leaves, making them upright and with greater light absorption and increasing the enzymatic activities responsible for the reduction and assimilation of nitrogen (Feng et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Response of radish seedlings ( Raphanus sativus L.) to different concentrations of ammoniacal nitrogen in absence and presence of silicon

Viciedo¹,

Prado²,

Toledo³

et al. 2017

Agron. colomb.

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Response of radish seedlings (Raphanus sativus L.) to different concentrations of ammoniacal nitrogen in absence and presence of siliconRespuesta de las plántulas del rábano (Raphanus sativus L.) a diferentes concentraciones de nitrógeno amoniacal en ausencia y presencia de silicio ABSTRACT RESUMENThere are unknown thresholds about the effects of ammonia toxicity in the cultivation of radish and its prejudice is higher in the root than in the aerial part, been the use of silicon an alternative to mitigate this toxicity. The objective was to evaluate the response of radish crop to different concentrations of an ammonium nutrient solution in the absence and presence of silicon under greenhouse conditions. After 30 days of germination were evaluated photosynthesis, green color index, stomatal conductance, transpiration, leaf area, tap root diameter, dry matter accumulation of nitrogen and silicon in shoot parts and roots respectively. Ammonia toxicity in radish decreased photosynthesis, transpiration, and stomatal conductance, having greater prejudice in the dry matter accumulation of root and aerial part, this effect was mitigated with the presence of silicon in the nutrient solution.Existen dudas sobre los efectos de la toxicidad amoniacal en la fisiología del cultivo del rábano y su perjuicio es mayor en la raíz que en la parte aérea, siendo posible el uso del silicio para mitigar esa toxicidad. Para esto el objetivo fue evaluar la respuesta del cultivo del rábano en función de diferentes concentraciones de NH 4 + en la solución nutritiva en ausencia y presencia de silicio. Posterior a los 30 días de la germinación se evaluaron la fotosíntesis, índice de color verde, conductancia estomática, transpiración, área foliar, diámetro de la raíz, materia seca y acúmulos de nitrógeno y silicio respectivamente en la parte aérea y las raíces de las plantas. La toxicidad amoniacal en el rábano disminuyó la fotosíntesis, la transpiración y la conductancia estomática, habiendo mayor perjuicio en el acúmulo de la materia seca de la raíz y la parte aérea, siendo mitigado este efecto con la presencia de silicio en la solución nutritiva.Key words: beneficial element, abiotic stress, nitrogen; nutrient solution, vegetable.Palabras clave: elemento benéfico, estrés abiótico, solución nutritiva, hortaliza.Nitrogen is the second most required nutrient by vegetables. This element is mainly absorbed in form of nitrate or ammonium, and constitutes amino acids, proteins and enzymes. In this way, it exerts influence on the growth of plant species and on the production of reserve substances and maturation. Ammoniacal nitrogen can bring some benefits to plants, because it acts as an important intermediary in many metabolic reactions (Britto and Kronzucker, 2002), has lower energy expenditure for its metabolism, and dispenses the reduction phases, which are required to the absorption of NO 3 - (Hachiya et al., 2012). However, elevated concentrations of NH 4 + lead to several issues: induces toxicity in plants, may lead to chlorosis in leave...

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“…Among these, 18 matching to 11 proteins were related to CO 2 assimilation/photosynthesis processes, representing the largest functional category group of proteins that were differentially expressed due to Cd and/or Si treatments. More recently, based on the results regarding Si-improved photosynthesis parameters and chloroplast ultrastructure under high-Zn (2 mM) stress, Song et al ( 2014 ) have analysed the results of high-throughput sequencing and selected the main photosynthesis-related genes that were differentially expressed (see Fig. 5.12 ).…”

Section: Molecular Aspects Of Si-mediated Metal Resistancementioning

confidence: 99%

“…According to the results of high-throughput sequencing (Fig. 5.12 ), Song et al ( 2014 ) investigated the expression levels of the photosynthesis-related genes by using fl uorescent real-time qPCR and showed that the expression levels of photosynthesis-related genes including Os08g02630 ( PsbY ), Os05g48630 ( PsaH ), Os07g37030 ( PetC ), Os03g57120 ( PetH ), Os09g26810 and Os04g38410 decreased in Si-deprived rice plants under high-Zn (0.2 mM Zn) stress, while the addition of 1.5 mM Si increased the expression levels of these genes in plants under high-Zn stress at 72 h, and the expression levels were higher in Si-treated plants than in Si-deprived plants. Similar work was also done by Li et al ( 2011 ).…”

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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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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The Effect of Silicon on Photosynthesis and Expression of Its Relevant Genes in Rice (Oryza sativa L.) under High-Zinc Stress

Cited by 184 publications

References 68 publications

Silicon mitigates oxidative stress and has positive effects in Eucalyptus platyphylla under aluminium toxicity

Silicon mitigates oxidative stress and has positive effects in Eucalyptus platyphylla under aluminium toxicity

Response of radish seedlings ( Raphanus sativus L.) to different concentrations of ammoniacal nitrogen in absence and presence of silicon

Silicon-Mediated Tolerance to Metal Toxicity

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