Improvement of drought tolerance in Tobacco (<i>Nicotiana rustica</i> L.) plants by Silicon

Hajiboland, Roghieh; Cheraghvareh, L.; Poschenrieder, Charlotte

doi:10.1080/01904167.2017.1310887

Cited by 48 publications

(33 citation statements)

References 47 publications

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“…Thus, the method of stress alleviation of AMF and Si for an increase in water uptake capacity may be less expensive than the strategy of osmo-adjustment. This result is in contrast with our previous observation on tobacco plants showing a Si-mediated improvement of plant water status through the leaf accumulation of organic osmolytes including soluble sugars, free amino acids, and proline [13].…”

Section: Effect Of Si and Amf On The Water Status And Concentration Ocontrasting

confidence: 99%

“…Si supplementation of plants alleviates D stress. Several mechanisms including the activation of photosynthetic enzymes [11], the activation of enzymatic antioxidant defense systems, increased water use efficiency [12,13], nutrient uptake [14], root growth and hydraulic conductance [15], and the accumulation of organic osmolytes [16] are involved in Si-mediated growth improvement under D [11,17].…”

Section: Introductionmentioning

confidence: 99%

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Silicon and the Association with an Arbuscular-Mycorrhizal Fungus (Rhizophagus clarus) Mitigate the Adverse Effects of Drought Stress on Strawberry

et al. 2019

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Silicon (Si) is a beneficial element that alleviates the effects of stress factors including drought (D). Strawberry is a Si-accumulator species sensitive to D; however, the function of Si in this species is obscure. This study was conducted to examine the effect of Si and inoculation with an arbuscular mycorrhizal fungus (AMF) on physiological and biochemical responses of strawberry plants under D. Plants were grown for six weeks in perlite and irrigated with a nutrient solution. The effect of Si (3 mmol L‒1), AMF (Rhizophagus clarus) and D (mild and severe D) was studied on growth, water relations, mycorrhization, antioxidative defense, osmolytes concentration, and micronutrients status. Si and AMF significantly enhanced plant biomass production by increasing photosynthesis rate, water content and use efficiency, antioxidant enzyme defense, and the nutritional status of particularly Zn. In contrast to the roots, osmotic adjustment did not contribute to the increase of leaf water content suggesting a different strategy of both Si and AMF for improving water status in the leaves and roots. Our results demonstrated a synergistic effect of AMF and Si on improving the growth of strawberry not only under D but also under control conditions.

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Section: Effect Of Si and Amf On The Water Status And Concentration Ocontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silicon and the Association with an Arbuscular-Mycorrhizal Fungus (Rhizophagus clarus) Mitigate the Adverse Effects of Drought Stress on Strawberry

et al. 2019

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“…(5) Si deposited outside the cell reduces evapotranspiration, protecting the plant against water stress. Cao et al, 2015) and tobacco (Hajiboland et al, 2017). Our analysis (Figure 4) found that increases in chlorophyll content was one of the largest effects of Si addition to salt stressed plants.…”

Section: Photosynthesismentioning

confidence: 66%

“…A large number of reports shows evidence that Si fertilization alters the water status of drought and salinity stressed plants (Gong and Chen, 2012;Sayed and Gadallah, 2014;Yin et al, 2014;Hasanuzzaman et al, 2018). As shown in Figure 4, this is partly a consequence of Si increasing water use efficiency (WUE), as has been reported in rice (Chen W. et al, 2011) and tobacco (Hajiboland et al, 2017), as well as increased levels of compatible solutes in Si fertilized plants (Pei et al, 2010;Sayed and Gadallah, 2014;Hajiboland et al, 2017;Yang et al, 2019). WUE appears to be modulated by Si in several ways, one of which is via transpiration.…”

Section: Water Statusmentioning

confidence: 71%

Is Silicon a Panacea for Alleviating Drought and Salt Stress in Crops?

2020

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Salinity affects around 20% of all arable land while an even larger area suffers from recurrent drought. Together these stresses suppress global crop production by as much as 50% and their impacts are predicted to be exacerbated by climate change. Infrastructure and management practices can mitigate these detrimental impacts, but are costly. Crop breeding for improved tolerance has had some success but is progressing slowly and is not keeping pace with climate change. In contrast, Silicon (Si) is known to improve plant tolerance to a range of stresses and could provide a sustainable, rapid and cost-effective mitigation method. The exact mechanisms are still under debate but it appears Si can relieve salt stress via accumulation in the root apoplast where it reduces "bypass flow of ions to the shoot. Si-dependent drought relief has been linked to lowered root hydraulic conductance and reduction of water loss through transpiration. However, many alternative mechanisms may play a role such as altered gene expression and increased accumulation of compatible solutes. Oxidative damage that occurs under stress conditions can be reduced by Si through increased antioxidative enzymes while Si-improved photosynthesis has also been reported. Si fertilizer can be produced relatively cheaply and to assess its economic viability to improve crop stress tolerance we present a cost-benefit analysis. It suggests that Si fertilization may be beneficial in many agronomic settings but may be beyond the means of smallholder farmers in developing countries. Si application may also have disadvantages, such as increased soil pH, less efficient conversion of crops into biofuel and reduced digestibility of animal fodder. These issues may hamper uptake of Si fertilization as a routine agronomic practice. Here, we critically evaluate recent literature, quantifying the most significant physiological changes associated with Si in plants under drought and salinity stress. Analyses show that metrics associated with photosynthesis, water balance and oxidative stress all improve when Si is present during plant exposure to salinity and drought. We further conclude that most of these changes can be explained by apoplastic roles of Si while there is as yet little evidence to support biochemical roles of this element.

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“…In addition to correcting acidity, in grass production areas, silicate is a source of Si that can allow a reduction in irrigation frequency, increase the tolerance of the grass to high and low temperatures, increase the resistance of the grass to pests and diseases and even increase the resistance of lawns against trampling (Godoy et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Soil correction for planting bermudagrass using steel slag or limestone

et al. 2020

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Limestone is the most commonly used acidity-correction agent in tropical soils. However, steel slag can be an alternative for turfgrass production areas because it contains silicon, which can increase turfgrass tolerance to biotic and/or abiotic stresses. This study was developed to evaluate the effect of the application of steel slag, as compared with limestone, on a bermudagrass sod production system. The experiment was carried out in Botucatu-SP, Brazil, in a randomized block design arranged in a factorial scheme 2 × 5 with 4 replications. Treatments consisted of two correctives (steel slag and limestone) and their rates, which were calculated to raise the soil base saturation to 12% (current), 30%, 50%, 70% and 90%. The application of lime and steel slag rates had positive effects on soil chemical attributes related to acidity correction, such as pH, Ca, Mg, H + Al, Al, CEC, SB, and base saturation (%). The slag provided higher levels of P, Ca, and Si, whereas limestone increased the Mg soil content. Steel slag provided a higher ground cover rate for bermudagrass than limestone at 114 and 161 days after transplanting (DAT), with maximum cover rate achieved with 60% base saturation at 161 DAT. The turfgrasses treated with slag showed a higher amount of roots, rhizomes, and stolons when compared with those treated with limestone. It is suggested the use of steel slag and, in calculating the need for corrective, 90% soil base saturation.

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Improvement of drought tolerance in Tobacco (Nicotiana rustica L.) plants by Silicon

Cited by 48 publications

References 47 publications

Silicon and the Association with an Arbuscular-Mycorrhizal Fungus (Rhizophagus clarus) Mitigate the Adverse Effects of Drought Stress on Strawberry

Silicon and the Association with an Arbuscular-Mycorrhizal Fungus (Rhizophagus clarus) Mitigate the Adverse Effects of Drought Stress on Strawberry

Is Silicon a Panacea for Alleviating Drought and Salt Stress in Crops?

Soil correction for planting bermudagrass using steel slag or limestone

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