Effects of silicon on defense of wheat against oxidative stress under drought at different developmental stages

Gong, Haijun; Chen, K. M.; Zhao, Zhiguang; Chen, G. C.; Zhou, Weijun

doi:10.1007/s10535-008-0118-0

Cited by 156 publications

(110 citation statements)

References 26 publications

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“…In this present study, soil applied Si significantly increased the SOD and CAT activity. It indicated that the oxidative damage due to high temperature in late sown wheat was ameliorated by Si application due to the remarkable increase of SOD and CAT and decrease of H 2 O 2 content (Liang et al 1996;Gong et al 2008). Gong et al (2005) reported that application of Si on wheat under water stress conditions also enhanced the activities of SOD, CAT and reduced the activity of H 2 O 2 .…”

Section: Discussionmentioning

confidence: 99%

Physiological response of late sown wheat to exogenous application of silicon

Sattar¹,

Cheema

Abbas³

et al. 2017

Cereal Research Communications

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Late planting of wheat in rice-wheat cropping system is perhaps one of the major factors responsible for low crop yield. The main cause of reduction in yield is due to supra-optimal conditions during the reproductive growth. High temperature during reproductive phase induces changes in water relations, decreases photosynthetic rate, and transpiration rate, stomatal conductance and antioxidative defence system. Silicon (Si), being a beneficial nutrient not only provides significant benefits to plants growth and development but may also mitigate the adversities of high temperature. A field study was conducted at Agronomic Research Area of University of Agriculture; Faisalabad, Pakistan to assess the performance of late sown wheat with the soil applied Si. Experiment was comprised of three sowing dates; 10 th Nov (normal), 10 th Dec (late), 10 th Jan (very late) with two wheat varieties (Sehar-2006 and Faisalabad-2008), and an optimized dose of Si (100 mg per kg soil), applied at different growth stages (control, crown root, booting and heading). Results indicated that 100 mg Si per kg soil at heading stage offset the negative impact of high temperature and induced heat tolerance in late sown wheat. Silicon application improved 34% relative water contents (RWC), 30% water potential, 26% osmotic potential, 23% turgor potential and 21% photosynthetic rate, and 32% transpiration rate and 20% stomatal conductance in wheat flag leaf than control treatment. Further it was observed that Si application preventing the oxidative membrane damage due to enhanced activity of antioxidant enzymes, i.e. 35% superoxide dismutase (SOD) and 38% catalase (CAT). In conclusion results of this field study demonstrated that soil applied Si (100 mg per kg soil) at heading stage enhanced all physiological attributes of wheat flag leaf. Which in turn ameliorated the adverse effects of high temperature in late sown wheat. Study depicted that Si can be used as a potential nutrient in order to mitigate the losses induced by high temperature stress.

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Section: Discussionmentioning

confidence: 99%

Physiological response of late sown wheat to exogenous application of silicon

Sattar¹,

Cheema

Abbas³

et al. 2017

Cereal Research Communications

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“…The ameliorative effects were seen at the grain filling stage compared to the booting stage under field conditions (Gong et al, 2008). Si alleviated the oxidative stress and regulated the activities of antioxidant enzymes.…”

Section: Role Of Silicon In Stressesmentioning

confidence: 92%

“…Alleviates oxidative stress and regulates activities of antioxidant enzymes Gong et al (2008) 11) Wheat Sodium silicate (2.11 mmol.kg -1 ) Alleviation of oxidative damage of functional molecules and maintainance of many physiological processes Gong et al (2005) 12) Wheat Sodium silicate (7.14 mmol) Improves growth Gong et al (2003) Zhang et al (2013) 2) Pistachio Sodium silicate (2.73 mM Si.kg -1 soil) Si enhanced the photochemical efficiency, photosynthetic gas exchange and antioxidant defense capacity Habibi and Hajiboland (2013) …”

Section: Acknowlegementsmentioning

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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“…Addition of silicon also improved water status and increased dry mass of wheat plants in pots under drought (Gong et al,. 2005(Gong et al,. , 2008.…”

Section: Silicon Uptake and Accumulation In Plantsmentioning

confidence: 99%

“…Under severe stress, these physiological biochemical reactions showed positive correlations with the amount of silicon supply. Gong et al (2008) showed that the intensity of oxidative destruction tested by the concentration of thiobarbituric acid reactive substances (TBARs) in the leaves of wheat was increased by drought, and there was a smaller increase upon application of silicon. …”

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confidence: 99%

Effects of silicon on plant resistance to environmental stresses: review

Balakhnina¹,

Borkowska²

2013

International Agrophysics

105

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A b s t r a c t. The role of exogenous silicon in enhancing plant resistance to various abiotic stressors: salinity, drought, metal toxicities and ultraviolet radiation are presented. The data on possible involvement of silicon in reducing the reactive oxygen species generation, intensity of lipid peroxidation, and in some cases, increasing the activity of enzymes of the reactive oxygen species detoxificators: superoxide dismutase, ascorbate peroxidase, glutathione reductase, guaiacol peroxidase and catalase are analyzed.K e y w o r d s: plant resistance, stress conditions, silicon, antioxidant enzymes EFFECT OF SOIL STRESSES ON PLANTSPlant growth and development is closely related to soil physical processes and properties (Gliñski, 2011;Gliñski et al., 2011). These are mass transport (water, vapour, air, and chemical flow, capillary flow, molecular diffusion, osmosis), mass absorption/desorption, energy transport (heat conduction, convection, radiation), energy adsorption/emission, phase transition (evaporation, condensation, crystallization, melting), mechanical processes (impact, compression, crushing, shearing, tension). Soil conditions based on the enumerated physical factors may create stresses for plant growth and development.Suitability of the environment for normal plant development is determined by the pool of oxygen stored in the soil and by the ability of its continuous supply from the atmosphere. After exhausting of the soil oxygen pool, and without further oxygen supply, plants start to suffer from oxygen stress; the root system perishes, and finally, the whole plant dies (Gliñski et al., 2004). Soil oxygen is one of the most important factors, which even during a short period can severely limit plant development and nutrient uptake, thereby resulting in a significant reduction of yields (Gliñski and Stêpniewski, 1985). Soil aeration is closely connected with the relations of air-water conditions in soils. Imbalance in these relations, for example, by flooding the soil, changes the chemical and physical soil properties, affects the biological activity of soil microorganisms and, consequently, leads to oxygen stress (Gliñski and Stêpniewski, 1985). These relations affect the biological activity of soil organisms, mainly microorganisms which are very sensitive to oxidation or reduction processes (Gliñski and Stêpniewski, 1985). It is expected that oxygen stress depends on various abiotic (soil flooding, drought, soil compaction, salinity, high temperature or a combination of these stresses) and biotic factors. Oxygen deficiency affects the intensity and the direction of a number of physiological and biochemical reactions and induces oxidative stress in the plant cells (Balakhnina et al., 2004). Salt stress is one of the major environmental factors that restrict plant growth and productivity worldwide. Salt causes both ionic as well as osmotic stress on plants (Hejazi Mehrizi et al., 2011;Parvaiz and Satyawati, 2008). A high concentration of Na + causes deficiency in other nutrients in the soil and in...

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Effects of silicon on defense of wheat against oxidative stress under drought at different developmental stages

Cited by 156 publications

References 26 publications

Physiological response of late sown wheat to exogenous application of silicon

Physiological response of late sown wheat to exogenous application of silicon

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

Effects of silicon on plant resistance to environmental stresses: review

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