Silicon ameliorates manganese toxicity by regulating manganese transport and antioxidant reactions in rice (Oryza sativa L.)

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

doi:10.1007/s11104-011-1076-4

Cited by 90 publications

(71 citation statements)

References 48 publications

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“…The boron-induced stress promoted the formation of increased amounts of H2O2, which suggests that total GSH does not contribute on non-enzymatic defence to remove or/and attenuate the cell oxidative damage (Wang et al, 2011;Dresler and Maksymiec, 2013). Li et al (2012) also described a decrease in the total GSH levels in Oryza sativa plants.…”

Section: Discussionmentioning

confidence: 93%

Proline but not Glutathione Actively Participates in the Tolerance Mechanism of Young Schizolobium parahyba var. amazonicum Plants Exposed to Boron Toxicity

Silva

Lobato

Souza

et al. 2016

Not Bot Horti Agrobo

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Glutathione, a peptide frequently associated with the antioxidant mechanism of plants against reactive oxygen species, and proline, an amino acid whose function is related to cellular homeostasis, can both contribute to improve plant tolerance under situations of abiotic stress, such as boron toxicity. Aims of this research were to (i) quantify the oxidant and antioxidant compounds, (ii) evaluate the photosynthetic pigments, (iii) determine amino acids and PRO, and (iv) determine whether GSH and PRO contribute to the tolerance mechanisms in young Schizolobium parahyba var. amazonicum plants under B toxicity. This experiment tested five boron levels (25, 50, 100, 150 and 250 µM B), being evaluated physiological and biochemical variables. The values reported to proline levels presented significant variation for treatments with 50, 100, 150 and 250 µM B, with increases for the 150 and 250 µM B levels, being 45.2 and 52.4%, respectively. This study found that boron toxicity promoted similar behaviours in both the leaves and root, which included progressive increases in hydrogen peroxide, electrolyte leakage, amino acids and proline, and decreases in total glutathione, chlorophyll a, chlorophyll b and total chlorophyll, confirming that proline but not glutathione actively participates in the tolerance mechanism of young Schizolobium parahyba plants exposed to boron toxicity.

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Section: Discussionmentioning

confidence: 93%

Proline but not Glutathione Actively Participates in the Tolerance Mechanism of Young Schizolobium parahyba var. amazonicum Plants Exposed to Boron Toxicity

Silva

Lobato

Souza

et al. 2016

Not Bot Horti Agrobo

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“…Addition of Si has been observed to signifi cantly neutralise Mn-induced increase in OH · and malondialdehyde and enhance plant growth in rice (Li et al 2012 ). It has also been reported that Si ameliorates Mn toxicity in cucumber by reducing hydroxyl radical accumulation in the leaf apoplast as well as free apoplastic Mn 2+ (Maksimović et al 2012 ).…”

Section: Mn Toxicitymentioning

confidence: 97%

Silicon (Si) Uptake

Mitra

2015

Regulation of Nutrient Uptake by Plants

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Silicon (Si) is the second most abundant element after oxygen and constitutes 27.7 % of the earth's crust. While the occurrence of pure silicon is rare, silicate minerals account for 90 % of the mass of the earth's crust. Silicon is a constituent of all plants, and its concentration in shoot may vary from 0.1 to 10 % of dry weight. Plants take up Si primarily as orthosilicic acid. LSi1 (low silicon 1) is a member of NIP2 subgroup of NIP subfamily of aquaporin-like proteins and functions as a Si-permeable channel. LSi6 is a homologue of LSi1 and is involved in xylem unloading of Si in rice.

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“…Clearly, Si supply could signifi cantly alleviate Mn toxicity symptoms in both Mn-sensitive and Mn-tolerant cultivars ( Fig. 5.2 ; Li et al 2012a ). Horst and Marschner ( 1978a ) reported that without Si supply, bean growth depression and toxicity symptoms occurred at concentrations as low as 0.5 μM Mn in the nutrient solution, while the Si-treated plants could tolerate 5.10 μM Mn.…”

Section: Manganese and Ironmentioning

confidence: 98%

“…Toxicity occurs at leaf Mn concentrations ranging from 200 to 5,300 mg kg −1 (Edwards and Asher 1982 ;Clarkson 1988 ), depending largely on the species; genotype; environmental conditions such as temperature, humidity, pH, light and source of nitrogen; nutritional interactions with calcium (Ca), magnesium (Mg), iron (Fe), phosphorus (P), molybdenum (Mo) and Si; and the action of mycorrhizae (El-Jaoual and Cox 1998 ). Symptoms of Mn toxicity are quite diverse among plant species, but brown spots on older leaves near the main and secondary veins surrounded by chlorotic zones are typical symptoms of Mn toxicity (Morris and Pierre 1949 ;Foy et al 1978Foy et al , 1995El-Jaoual and Cox 1998 ;Li et al 2012a ).…”

Section: Manganese and Ironmentioning

confidence: 99%

“…Tavakkoli et al ( 2011 ) reported that interactions of Si slag with phosphorus increased dry matter yield of rice grown on a highly weathered, acidic lateritic soil and probably mitigated Mn toxicity by decreasing Mn concentration. Li et al ( 2012a ) investigated the alleviative effect of Si on excess Mn in rice. Mn toxicity symptoms generally appeared as dark brown spots, necrotic lesions, chlorosis of leaf edges and tips and crinkle leaf.…”

Section: Manganese and Ironmentioning

confidence: 99%

See 1 more Smart Citation

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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Silicon ameliorates manganese toxicity by regulating manganese transport and antioxidant reactions in rice (Oryza sativa L.)

Cited by 90 publications

References 48 publications

Proline but not Glutathione Actively Participates in the Tolerance Mechanism of Young <i>Schizolobium parahyba</i> var. <i>amazonicum </i> Plants Exposed to Boron Toxicity

Proline but not Glutathione Actively Participates in the Tolerance Mechanism of Young <i>Schizolobium parahyba</i> var. <i>amazonicum </i> Plants Exposed to Boron Toxicity

Silicon (Si) Uptake

Silicon-Mediated Tolerance to Metal Toxicity

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