Physiological and biochemical impacts of silicon against water deficit in sugarcane

Bezerra, Breno Kennedy Lima; Lima, Giuseppina Pace Pereira; Reis, André Rodrigues dos; Silva, Marcelo de Almeida; Camargo, Mônica Sartori de

doi:10.1007/s11738-019-2980-0

Cited by 36 publications

(36 citation statements)

References 38 publications

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“…The Pearson correlation values between the soluble Si in soil and the Si concentrations in the various tissues of sugarcane, especially the TVD leaves, confirmed that both extractants were adequate to evaluate the Si released from silicate in the soil (Table 2). This increase in Si in the soil is consistent with the results of a few studies on the evaluation of soluble Si in soils with Si application rates equivalent to 400 to 600 kg ha −1 (Bezerra et al 2019;Camargo et al 2013Camargo et al , 2017Sousa et al 2010).…”

Section: Discussionsupporting

confidence: 90%

“…It was used a completely randomized factorial design (2 × 5) with eight replications, two cultivars (RB86-7515, RB85-5556), and five Si rates equivalent to 0, 250, 500, 750, and 1000 kg ha −1 Si. They were chosen according to their drought-tolerance (RB86-7515) and drought-sensitivity (RB85-5536), as previously reported by Bezerra et al (2019). The source of Si was Ca-Mg silicate containing 262 g kg −1 Ca, 56.8 g kg −1 Mg, and 105 g kg −1 Si.…”

Section: Experimental Design and Growth Conditionsmentioning

confidence: 99%

“…Although it was already known that leaves contain higher Si concentrations than stalks (Camargo et al 2010;Keeping et al 2013), the results of the distribution of Si between aerial parts and root systems in sugarcane regarding the function of Si rates have not been previously published. Additionally, differences in Si concentration in leaves among sugarcane cultivars have already reported (Berthelsen et al 1999;Camargo et al 2010), but there are still few results in contrasting droughttolerant cultivars, which could contain lower Si contents (Bezerra et al 2019;Camargo et al 2017.…”

Section: Introductionmentioning

confidence: 98%

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Increase in Silicate Fertilization Improves the Biomass of Drought-Tolerant Contrasting Cultivars Without Prejudicial effects in Nutrient Uptake in Sugarcane

Camargo

Bozza

Pereira

et al. 2020

J Soil Sci Plant Nutr

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Studies are still scarce about silicate fertilization as a silicon (Si) supply to drought-tolerant contrasting sugarcane cultivars. The objective was determined whether the increase of Si rates up to 1000 kg ha −1 Si improves the Si in soil, Si uptake, and biomass of aerial part and root system of sugarcane without prejudicial effects in chemical attributes of soil and in nutrients absorption and whether Si concentration and biomass of drought-sensitive are increased similar to that of drought-tolerant sugarcane cultivar in the function of Si rates. An experiment was conducted in randomized blocks with cultivars (RB86-7515 = drought-tolerant; RB85-5536 = and drought-sensitive) and Si rates (0, 250, 500, 750, and 1000 kg ha −1 Si) using silicate in sandy soil. Fertilization increased Si contents in soil, Si contents and biomass of straw and stalks, Si in green leaves, and biomass of roots, independent of cultivars. The Si rates improved also the Ca in green leaves and Mn in straw, but reduced Ca and Mg in the soil and Mg concentration in the straw. Lower biomass and higher Si concentration were found in RB85-5536, and it was also true in RB86-7515 for the roots. Fertilization with Si rates up to 1000 kg ha −1 Si as silicate in sandy soil was not excessive, increasing Si availability, Si uptake in straw, green leaves, and stalks, and aerial part and root biomass, independently of cultivar without prejudicial effects in chemical attributes of soil and nutrient uptake in sugarcane.

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Section: Discussionsupporting

confidence: 90%

Section: Experimental Design and Growth Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Increase in Silicate Fertilization Improves the Biomass of Drought-Tolerant Contrasting Cultivars Without Prejudicial effects in Nutrient Uptake in Sugarcane

Camargo

Bozza

Pereira

et al. 2020

J Soil Sci Plant Nutr

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“…Water stress, during the tillering phase and early grand growth phase, has been a challenge for sugarcane production (Machado et al 2009;Ramesh 2000). In order to check the influence of calcium magnesium silicate against water stress, Bezerra et al (2019) conducted an experiment by imposing a moderate water stress in two sugarcane cultivars (drought tolerant and drought sensitive) during tillering phase and the grand growth phase for 30 and 60 days. This study indicated that the addition of Si enhanced the physiological response which is reflected in the increased water potential and relative water content in sugarcane leaves during both growth phases.…”

Section: Water Stressmentioning

confidence: 99%

An Overview on the Potential of Silicon in Promoting Defence Against Biotic and Abiotic Stresses in Sugarcane

Majumdar

Prakash

2020

J Soil Sci Plant Nutr

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Although silicon (Si) is ubiquitous in the earth's crust, its essentiality for growth of higher plants is still under discussion. By recognising the overwhelming potential of Si in alleviating a wide range of biotic and abiotic stresses, the Association of American Plant Food Control Officials and the International Plant Nutrition Institute, Georgia, USA, have designated Si as a plant 'beneficial substance' in 2014 and 2015, respectively. Sugarcane is a Si-accumulating crop which strongly responds to Si fertilisation especially in Si-deficient soil. Due to intensive weathering prevailing in humid and sub-humid regions, most of the soil-available Si, taken up by plants in the form of monosilicic acid (H 4 SiO 4), is lost through leaching. If the concentration of monosilicic acid is being maintained at a fixed level by soil reserves, the highly weathered soils of humid and sub-humid regions tend to become depleted in Si if continuously cultivated with sugarcane. Hence, leaching of Si from the soil coupled with plant uptake is an important factor in determining Si concentrations in soil. Consequently, it can be said that the intensive cultivation of sugarcane depletes the existing low available Si content in soil, resulting in necessity for Si fertilisation. Moreover, the uptake of Si by sugarcane (500-700 kg Si ha −1) sometimes surpasses those of the macronutrients (especially N, P and K). At the same time, due to change in global climate and monoculture system followed in sugarcane, it is affected by a wide range of biotic and abiotic stresses in field condition which calls for external Si supplementation to achieve sustainable growth and yield of sugarcane. The beneficial effects of Si in sugarcane include improvement of photosynthesis and lodging, enhancement of growth and development, regulation of reactive oxygen species, protection from soil salinity, reduction in metal toxicity, alleviation of freeze damage, mitigation of water stress and suppression of diseases and pests. In this review, we made an effort to compile the existing literature describing the potential of Si in promoting defence against various biotic and abiotic stresses in sugarcane and suggested possible future research perspectives.

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“…The role of Si in tolerance to water deficit is well known. It acts in physiological and biochemical processes such as maintenance of leaf water potential [ 6 ] and water content [ 7 ], preservation of photosynthetic pigments [ 8 ], adjustment of compatible osmolytes [ 9 ], and reduction of oxidative stress by decreasing cell electrolyte leakage index [ 10 ], thus benefiting growth parameters and dry biomass yield [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Root- and foliar-applied silicon modifies C: N: P ratio and increases the nutritional efficiency of pre-sprouted sugarcane seedlings under water deficit

et al. 2020

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Water deficit limits the establishment of sugarcane plants from pre-sprouted seedlings (PSS). Silicon (Si) can mitigate such stress, and your supply in plants with the active absorption mechanism is carried out through roots. However, foliar spraying has been practiced to supply Si in PSS production nurseries. Althought it is known that Si via roots can alter C: N: P ratios, nothing has been reported about its supply via foliar spraying, nor whether such changes interfere with structural nutrient use efficiency and with plant physiological responses. Thus, this study aimes to asses whether Si foliar spraying changes C: N: P ratios and increases the nutritional efficiency of PSS, as well as whether water deficiency interferes with such a relationships. For these purposes, three experiments were carried out. In experiment I, treatments consisted of two sugarcane cultivars (CTC 4 and RB 966928) and three Si supply forms (in nutrient solution via roots [SiR], via foliar spraying [SiL], and one control with the absence of Si [-Si]). The same Si supply forms were used in the other two experiments. In experiment II, a short-term water deficit was induced by polyethylene glycol addition to nutrient solution (-0.6 MPa) for three days. In experiment III, a long-term water deficit was imposed using levels of soil water retention capacity (70% [no water deficit], 50% [moderate water deficit], and 30% [severe water deficit] for 30 days. Our findings revealed that Si supply decreased C concentrations regardless of water conditions and that N and P concentrations varied with Si supply form and water deficit level. Moreover, root- and foliar-applied Si modified the C: N: P stoichiometry and increased C use efficiency in PSS, which thus increased N and P use efficiencies. Such an increased nutritional performance helped adjust physiological parameters and increase dry matter yield in PSS, both under water stress and non-stress conditions. Further, Si foliar spraying promoted structural effects on PSS regardless of water conditions, even if sugarcane has an active absorption via roots. In conclusion, foliar spraying can be used to supply Si in PSS production nurseries.

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Physiological and biochemical impacts of silicon against water deficit in sugarcane

Cited by 36 publications

References 38 publications

Increase in Silicate Fertilization Improves the Biomass of Drought-Tolerant Contrasting Cultivars Without Prejudicial effects in Nutrient Uptake in Sugarcane

Increase in Silicate Fertilization Improves the Biomass of Drought-Tolerant Contrasting Cultivars Without Prejudicial effects in Nutrient Uptake in Sugarcane

An Overview on the Potential of Silicon in Promoting Defence Against Biotic and Abiotic Stresses in Sugarcane

Root- and foliar-applied silicon modifies C: N: P ratio and increases the nutritional efficiency of pre-sprouted sugarcane seedlings under water deficit

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