Silicon: A Sustainable Tool in Abiotic Stress Tolerance in Plants

Malhotra, C. L.; Kapoor, Riti Thapar

doi:10.1007/978-3-030-06118-0_14

Cited by 33 publications

(10 citation statements)

References 163 publications

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“…Silicon benefits have been demonstrated for plants grown under stress conditions, such as pest attack, lodging, nutrient imbalance, salinity, metal, water stress, and low temperatures [12][13][14][15]. In our study, the sole application of Si stimulated the antioxidant system of both barley cultivars, compared with the control treatment.…”

Section: Discussionmentioning

confidence: 56%

“…Barley exhibits considerably higher sensitivity to Al toxicity than rice, rye, oats, and wheat [8,9]. Despite Si is not recognized to be an essential nutrient for vascular plants, it has widely been demonstrated that Si supply increases crop production, root volume, and leaf density, and also decreases diseases and pest attack in several plant species exposed to biotic and abiotic stresses [10][11][12][13][14][15]. Over recent years, it has been shown that Si enhances the primary metabolism by improving photosynthesis [11,16,17] and nutrient uptake [18], as well as the secondary metabolism through stimulation of the production of phenolic compounds with either antioxidant (e.g., flavonoids) or structural (e.g., lignin) functions [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Silicon Improves the Production of High Antioxidant or Structural Phenolic Compounds in Barley Cultivars under Aluminum Stress

et al. 2019

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Aluminum (Al) toxicity is one of the main growth and yield limiting factors for barley grown on acid soils. Silicon (Si) ameliorates Al toxicity as well as it promotes the phenolic compounds production that have antioxidant or structural role. We evaluated the time-dependent kinetics of Al and Si uptake and the impact of Si on the production of antioxidant- or structural- phenols in barley cultivars at the short-term. Two barley cultivars with contrasting Al tolerance (Hordeum vulgare ‘Sebastian’, Al tolerant; and H. vulgare ‘Scarlett’, Al sensitive), exposed to either −Al (0 mM) or +Al (0.2 mM) nutrient solutions without Si (−Si) or with 2 mM (+Si) were cultured for 48 h. Aluminum and Si concentration decreased in plants at all harvest times when Al and Si were simultaneously supplied; this effect was more noticeable in ‘Scarlett’. Nevertheless, Si influenced the antioxidant system of barley irrespective of the Al tolerance of the cultivar, decreasing oxidative damage and enhancing radical scavenging activity, the production of phenolic compounds, and lignin accumulation in barley with short-term exposure to Al.

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Section: Discussionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Silicon Improves the Production of High Antioxidant or Structural Phenolic Compounds in Barley Cultivars under Aluminum Stress

et al. 2019

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“…Despite this, most of these findings are scattered and need to come up with a comprehensive image of progress made on this topic. There have been some recent review articles published on Si, such as those by Etesami and Jeong (2018) and Malhotra and Kapoor (2019), but they do not address the crosstalk of physio-molecular functions in response to salinity stress. In this review, we focus on studies that have investigated plant metabolism and physiology under salinity stress and have elucidated the complex mechanisms and interactions involving Si in the amelioration of the detrimental effect of salinity on crops.…”

Section: Introductionmentioning

confidence: 99%

Silicon and Salinity: Crosstalk in Crop-Mediated Stress Tolerance Mechanisms

et al. 2019

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Salinity stress hinders the growth potential and productivity of crop plants by influencing photosynthesis, disturbing the osmotic and ionic concentrations, producing excessive oxidants and radicals, regulating endogenous phytohormonal functions, counteracting essential metabolic pathways, and manipulating the patterns of gene expression. In response, plants adopt counter mechanistic cascades of physio-biochemical and molecular signaling to overcome salinity stress; however, continued exposure can overwhelm the defense system, resulting in cell death and the collapse of essential apparatuses. Improving plant vigor and defense responses can thus increase plant stress tolerance and productivity. Alternatively, the quasi-essential element silicon (Si)—the second-most abundant element in the Earth’s crust—is utilized by plants and applied exogenously to combat salinity stress and improve plant growth by enhancing physiological, metabolomic, and molecular responses. In the present review, we elucidate the potential role of Si in ameliorating salinity stress in crops and the possible mechanisms underlying Si-associated stress tolerance in plants. This review also underlines the need for future research to evaluate the role of Si in salinity stress in plants and the identification of gaps in the understanding of this process as a whole at a broader field level.

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“…Silicon (Si) is a beneficial element that helps plants overcome temperature stresses. The mechanisms involved include stimulation of antioxidant systems [1,2], maintenance of photosynthetic proteins [3], retention of water content [4], fortification of cell wall [4], restoration of hormonal balances [5], and regulation of stress-related genes [6,7]. Although Si is largely present in soil, the plant-available form (monosilicic acid) is relatively limited, especially in Korea which has low available Si in soil (averaged 72 mg•kg −1 ) [8,9].…”

Section: Introductionmentioning

confidence: 99%

Silicon Alleviates Temperature Stresses in Poinsettia by Regulating Stomata, Photosynthesis, and Oxidative Damages

Jeong

2020

Agronomy

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The effects of silicon (Si) on temperature stresses were investigated in poinsettia. Well-rooted cuttings supplemented with and without Si were exposed to 40 °C, and plants treated with or without Si during cutting propagation and cultivation were subjected to 4 °C. The results showed that almost all the stomata of cuttings without Si supplementation were closed, while some of them were still open in cuttings supplemented with Si under a high temperature stress. However, Si was not able to alleviate stomatal closure of poinsettia under low temperature stress. The increased epicuticular wax might contribute to enhanced resistance of poinsettia to low temperature stresses. In addition, poinsettia maintained a higher photosynthetic rate and lower malonaldehyde and hydrogen sulfide concentrations when supplemented with Si under high and low temperature stresses, which might contribute to lower APX activities. Overall, temperature stresses had negative impacts on the physiological characteristics of poinsettia, while Si could alleviate some effects of temperature stresses.

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Silicon: A Sustainable Tool in Abiotic Stress Tolerance in Plants

Cited by 33 publications

References 163 publications

Silicon Improves the Production of High Antioxidant or Structural Phenolic Compounds in Barley Cultivars under Aluminum Stress

Silicon Improves the Production of High Antioxidant or Structural Phenolic Compounds in Barley Cultivars under Aluminum Stress

Silicon and Salinity: Crosstalk in Crop-Mediated Stress Tolerance Mechanisms

Silicon Alleviates Temperature Stresses in Poinsettia by Regulating Stomata, Photosynthesis, and Oxidative Damages

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