Effects of silicon on Zea mays plants exposed to water and oxygen deficiency

Sayed, Suzan A.; Gadallah, M. A. A.

doi:10.1134/s1021443714040165

Cited by 28 publications

(17 citation statements)

References 21 publications

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“…Among the well accepted tolerance mechanisms initiated for averting the deleterious effects of stresses the accumulation of compatible osmolytes marks a key position. In the present study Si supplementation increased the accumulation of proline and glycine betaine keeping the major plant metabolic pathways protected from the salinity stress by maintaining the tissue water content (Sayed and Gadallah, 2014, Mali and Aery, 2008). Accumulation of proline and glycine betaine protects photosynthetic machinery and ameliorates the oxidative damage during abiotic stresses (Hashem et al, 2015, Ahmad et al, 2016, Abd_Allah et al, 2015b, Abd_Allah et .al., 2017).…”

Section: Discussionsupporting

confidence: 51%

Silicon supplementation modulates antioxidant system and osmolyte accumulation to balance salt stress in Acacia gerrardii Benth

Al-Huqail

Alqarawi²,

Hashem

et al. 2019

Saudi Journal of Biological Sciences

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Experiments were conducted to investigate the role of silicon (Si, 2 mM potassium silicate - K2SiO3) in ameliorating the salinity (200 mM NaCl) triggered growth retardation, photosynthetic inhibition and the oxidative damage in Talh trees (Acacia gerrardii Benth). Salinity stress reduced length and dry biomass accumulation of root and shoot which were significantly improved by Si supplementation. Application of Si enhanced the synthesis of photosynthetic pigments including chlorophyll a, chlorophyll b, total chlorophylls and carotenoids resulting in greater photosynthetic activity measured in terms of net CO2 assimilation. Stomatal conductance and transpiration rate were declined due to NaCl treatment and supplementation of Si ameliorated the negative impact of NaCl on these attributes and was significantly improved when applied to normal grown plants. Further, lipid peroxidation was more in NaCl stressed plants without Si as compared to those supplemented with Si. Si protected Talh trees from NaCl induced oxidative damage by improving the activity of antioxidant enzymes (SOD, POD, CAT, APX and GR) and the content of ascorbic acid. Accumulation of compatible osmolytes including proline and glycine betaine was increased due to Si supplementation leading to improved growth under saline conditions in addition Si supplementation mitigated the deleterious effects of NaCl on flavonoid content. More importantly Si supplementation prevented excess uptake of Na and also protected the ill effects of excess Na on the uptake and accumulation of K and Ca resulting in significant decline in Na/K ratio. In conclusion, Si mitigates the negative effects of NaCl in A. gerrardii by modifying nutrient uptake, osmolytes accumulation and up-regulating antioxidant system.

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Section: Discussionsupporting

confidence: 51%

Silicon supplementation modulates antioxidant system and osmolyte accumulation to balance salt stress in Acacia gerrardii Benth

Al-Huqail

Alqarawi²,

Hashem

et al. 2019

Saudi Journal of Biological Sciences

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“…Most of the work is done with soil application of silicon; however relatively little work has been carried out with respect to foliar treatment which has gained momentum recently e.g. Bukhari et al (2015) and Maghsoudi et al (2015) in wheat; Sayed and Gadallah, (2014) in maize; Pilon et al (2014) and (2013) in potato; Passala et al (2014) in Beneficial role of silicon: Beneficial effects of Si are usually obvious in crops which actively accumulate Si in their shoots. This is because most of the beneficial effects of Si are expressed through Si deposited on the leaves and stems.…”

Section: Silicon Absorption and Uptake In Wheatmentioning

confidence: 99%

Role of silicon under water deficit stress in wheat: (Biochemical perspective): A review

Sapre

Vakharia

2016

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Silicon's role in mediating resistance against various stresses has been a matter of focus in the past decade. Poaeceae family plants are known as high accumulators of silicon. Wheat shows rapid absorption, the optimum accumulation of silicon occurring at around 20 days. Silicon plays a role as a mechanical and a physiological barrier. It also alters the levels of osmolytes and antioxidant enzymes which are a first line of defense in the water deficit stress; also reducing the levels of oxidative stress factors such as hydrogen peroxide. But the results vary with respect to the modes of stress application and its duration. Nowadays, foliar mode of silicon application is carried out compared to the traditional soil application yielding some promising results. Further studies are needed to confirm the mechanisms governing protection which can be done with the comparison of the transcriptome analysis of the stressed plants and also microscopic studies revealing the site of deposition.

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“…Silicon (Si) is one of the major elements used to alleviate the adverse effects of drought in plants. The Si application has been reported to improve plant tolerance against drought in a number of field crops including rice [16], sorghum [17], maize [18], wheat [19], sunflower [20], cucumber [21], soybean [22], and tomato [23]. Seed priming with Si is an efficient and easy method to regulate plants’ tolerance against drought stress and it is widely used in many plants [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…The application of Si reduced lipid peroxidation and H 2 O 2 accumulation in seedlings of rice under drought stress [16]. The protective effects of Si against oxidative damage have been documented in different crop plants [16,17,18,27].…”

Section: Introductionmentioning

confidence: 99%

Silicon Priming Regulates Morpho-Physiological Growth and Oxidative Metabolism in Maize under Drought Stress

Parveen

Liu

Hussain

et al. 2019

Plants

145

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Seed priming with silicon (Si) is an efficient and easy method to regulate plant tolerance against different abiotic stresses. A pot experiment was conducted to examine the Si-mediated changes in oxidative defense and some vital physio-biochemical parameters of maize under a limited water supply. For this purpose, two maize varieties (Pearl and Malka) with different Si priming treatments (0, 4 mM, 6 mM) were grown under a control and 60% field capacity for three weeks. At 60% field capacity, significant reductions in plant growth attributes and chlorophyll contents were recorded compared with the control. The negative effects of drought stress were more severe for Malka compared with Pearl. Drought stress increased the malondialdehyde (MDA) and hydrogen peroxide (H2O2) contents, altered the activities of antioxidant enzymes (superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT)), and triggered the accumulation of soluble sugars, glycine betaine, proline, and phenolics contents. Nevertheless, seed priming with silicon at 4 or 6 mM was effective in alleviating the detrimental effects of drought stress in both cultivars. Si priming particularly at 6 mM significantly enhanced the shoot and root lengths as well as their biomass and improved the levels of photosynthetic pigments. Moreover, Si treatments enhanced the activities of antioxidant enzymes (SOD, POD, and CAT) while it reduced the MDA and H2O2 contents in both cultivars under stress conditions. In crux, the present investigation suggests that Si priming mitigates the harmful effects of drought stress and contributes to the recovery of maize growth.

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Effects of silicon on Zea mays plants exposed to water and oxygen deficiency

Cited by 28 publications

References 21 publications

Silicon supplementation modulates antioxidant system and osmolyte accumulation to balance salt stress in Acacia gerrardii Benth

Silicon supplementation modulates antioxidant system and osmolyte accumulation to balance salt stress in Acacia gerrardii Benth

Role of silicon under water deficit stress in wheat: (Biochemical perspective): A review

Silicon Priming Regulates Morpho-Physiological Growth and Oxidative Metabolism in Maize under Drought Stress

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