Foliar application of silicon improves stem strength under low light stress by regulating lignin biosynthesis genes in soybean (Glycine max (L.) Merr.)

Hussain, Sajad; Li, Shuxian; Mumtaz, Maryam; Shafiq, Iram; Iqbal, Nasır; Brestič, Marián; Shoaib, Muhammad; Qin, Sisi; Li, Wang; Xu, Ming; Chen, Bing; Živčák, Marek; Rastogi, Anshu; Skalický, Milan; Hejnák, Václav; Liu, Weiguo; Yang, Wenyu

doi:10.1016/j.jhazmat.2020.123256

Cited by 89 publications

(38 citation statements)

References 64 publications

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“…In the Al-sensitive cultivar (Scarlett) total lignin concentration in roots, quantified as the sum of the monomers (V + C + S), was improved by Si addition under Al stress. This increase is in agreement with the higher intensity of safranine staining (Figure 4), and supports previous findings showing that Si has a mitigating effect due to increased production of lignin under stressful conditions [19,22,57]. Such an effect may be associated with either increased hydrogen peroxide production or peroxidase activity in cell walls [58,59].…”

Section: Discussionsupporting

confidence: 92%

“…In this regard, Si appears to stimulate the production of phenols in plants subjected to salinity, drought, temperature stress, UV radiation, cadmium, chromium [2], manganese [15], aluminum [16,17], nickel [11], soil acidity [18] and biotic [12,19,20] stresses. There is some evidence showing that the positive effects of Si on phenol metabolism in plants growing in stressful environments is due to (i) the regulation of the gene expression or activity of key enzymes in the phenylpropanoid pathway [21,22], (ii) the enhancement of total phenol production [17,23], and/or (iii) the formation of complexes involving lignin and carbohydrates [24,25] or Si-polyphenol in the cell wall [15]. However, there is still no information about the impact of Si on the production and composition of phenolic compounds with either antioxidant capacity or structural action.…”

Section: Introductionmentioning

confidence: 99%

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Silicon Modulates the Production and Composition of Phenols in Barley under Aluminum Stress

et al. 2020

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Silicon (Si) exerts beneficial effects in mitigating aluminum (Al) toxicity in different plant species. These include attenuating oxidative damage and improving structural strengthening as a result of the increased production of secondary metabolites such as phenols. The aim of this research was to evaluate the effect of Si on phenol production and composition in two barley cultivars under Al stress. Our conceptual approach included a hydroponic experiment with an Al-tolerant (Sebastian) and an Al-sensitive (Scarlett) barley cultivar treated with two Al doses (0 or 0.2 mM of Al) and two Si doses (0 or 2 mM) for 21 days. Chemical, biochemical and growth parameters were assayed after harvest. Our results indicated that the Al and Si concentration decreased in both cultivars when Al and Si were added in combination. Silicon increased the antioxidant activity and soluble phenol concentration, but reduced lipid peroxidation irrespective of the Al dose. Both barley cultivars showed changes in culm creep rate, flavonoids and flavones concentration, lignin accumulation and altered lignin composition in Si and Al treatments. We concluded that Si fertilization could increase the resistance of barley to Al toxicity by regulating the metabolism of phenolic compounds with antioxidant and structural functions.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Silicon Modulates the Production and Composition of Phenols in Barley under Aluminum Stress

et al. 2020

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“…The judicious application of silicon, phosphorus, and plant growth promoting rhizobacteria is considered pivotal in the mitigation of such abiotic stresses [ 43 ]. It has been reported that Si maintains plant strength through the regulation of the internal physiology [ 50 ] and compensating P deficiencies in plants [ 51 ]. It has also been reported that PGPB engineers the root system of plants, thereby facilitating nutrient uptake [ 52 ].…”

Section: Discussionmentioning

confidence: 99%

“…Our findings are also in agreement with Kang et al [ 72 ], who showed that gibberellin-producing Pseudomonas putida lowered ABA and JA, thereby promoting growth in soybean. The generation of ABA is based particularly on stomatal conductance [ 50 ] and has a crosstalk with JA and SA under salt stress conditions [ 31 ]. Since Si, P, and PGPB have been reported to regulate stomatal conductance, their synergistic effect might have reduced the stress hormones.…”

Section: Discussionmentioning

confidence: 99%

The Halotolerant Rhizobacterium—Pseudomonas koreensis MU2 Enhances Inorganic Silicon and Phosphorus Use Efficiency and Augments Salt Stress Tolerance in Soybean (Glycine max L.)

et al. 2020

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Optimizing nutrient usage in plants is vital for a sustainable yield under biotic and abiotic stresses. Since silicon and phosphorus are considered key elements for plant growth, this study assessed the efficient supplementation strategy of silicon and phosphorus in soybean plants under salt stress through inoculation using the rhizospheric strain—Pseudomonas koreensis MU2. The screening analysis of MU2 showed its high salt-tolerant potential, which solubilizes both silicate and phosphate. The isolate, MU2 produced gibberellic acid (GA1, GA3) and organic acids (malic acid, citric acid, acetic acid, and tartaric acid) in pure culture under both normal and salt-stressed conditions. The combined application of MU2, silicon, and phosphorus significantly improved silicon and phosphorus uptake, reduced Na+ ion influx by 70%, and enhanced K+ uptake by 46% in the shoots of soybean plants grown under salt-stress conditions. MU2 inoculation upregulated the salt-resistant genes GmST1, GmSALT3, and GmAKT2, which significantly reduced the endogenous hormones abscisic acid and jasmonic acid while, it enhanced the salicylic acid content of soybean. In addition, MU2 inoculation strengthened the host’s antioxidant system through the reduction of lipid peroxidation and proline while, it enhanced the reduced glutathione content. Moreover, MU2 inoculation promoted root and shoot length, plant biomass, and the chlorophyll content of soybean plants. These findings suggest that MU2 could be a potential biofertilizer catalyst for the amplification of the use efficiency of silicon and phosphorus fertilizers to mitigate salt stress.

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“…It is being produced and consumed for its protein and oil content (Song et al 2016). When intercropped with maize, the crop suffers from various abiotic stresses, the most important being the shade stress (Feng et al 2019, Hussain et al 2020a and moisture stress due to adjacent high stalked maize plants (Rahman et al 2017. A combination of shade and moisture stress leads to biochemical, physiological, and structural changes at the leaf and whole plant level (Holmgren 2000, Sack and Grubb 2002, Sack 2004, Aranda et al 2005.…”

Section: Introductionmentioning

confidence: 99%

Effect of simultaneous shade and drought stress on morphology, leaf gas exchange, and yield parameters of different soybean cultivars

Shafiq¹,

Hussain²,

Hassan³

et al. 2020

Photosynt.

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An interactive effect of simultaneous shade and drought stress on drought-tolerant and drought-sensitive cultivars of soybean was studied. As drought stress intensified, the net photosynthetic rate decreased in both cultivars due to reduced leaf area, relative water content, transpiration rate, stomatal conductance, chlorophyll content, and Rubisco activity which ultimately led to yield reduction. Moreover, the chlorophyll fluorescence parameters also decreased. Interestingly, a moderate shade was found helpful in alleviating the adverse effects of drought stress, specifically in resistant cultivar N12 where seed yield improved significantly under moderate drought conditions in contrast to the cultivar C103. In summary, the effect of drought stress on soybean depended on the irradiance conditions and shade could enhance soybean drought resistance, although this resistance was cultivar dependent. With appropriate cultivar selection, a moderate shade can help optimize yield and improve the performance of drought-exposed soybean.

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Foliar application of silicon improves stem strength under low light stress by regulating lignin biosynthesis genes in soybean (Glycine max (L.) Merr.)

Cited by 89 publications

References 64 publications

Silicon Modulates the Production and Composition of Phenols in Barley under Aluminum Stress

Silicon Modulates the Production and Composition of Phenols in Barley under Aluminum Stress

The Halotolerant Rhizobacterium—Pseudomonas koreensis MU2 Enhances Inorganic Silicon and Phosphorus Use Efficiency and Augments Salt Stress Tolerance in Soybean (Glycine max L.)

Effect of simultaneous shade and drought stress on morphology, leaf gas exchange, and yield parameters of different soybean cultivars

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