Exogenous silicon and salicylic acid applications improve tolerance to boron toxicity in field pea cultivars by intensifying antioxidant defence systems

Oliveira, Kevein Ruas; Souza, Jonás Pereira de; Bennett, Sarita Jane; Checchio, Mirela Vantini; Alves, Rita de Cássia; Felisberto, Guilherme; Gratão, Priscila Lupino

doi:10.1016/j.ecoenv.2020.110778

Cited by 34 publications

(15 citation statements)

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“…This might be due to the fact that dry biomass accumulation of roots was much lower than that of plant shoots, causing reduced accumulation of B in the roots as compared to shoots. All treatments receiving high B yielded a decrease in biomass, indicating that high levels of B led to a discrepancy in cell wall composition, which might have resulted in the inhibition of the rapid growth of pea plants [61,62]. Our results were in agreement with the findings of Chen et al [63], i.e., that high B levels had a substantial harmful effect on cotton plants.…”

Section: Discussionsupporting

confidence: 91%

Assessing Yield Response and Relationship of Soil Boron Fractions with Its Accumulation in Sorghum and Cowpea under Boron Fertilization in Different Soil Series

et al. 2021

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Boron (B) is an essential micronutrient in the growth of reproductive plant parts. Its deficiency and/or toxicity are widespread in arid and semi-arid soils with low clay contents. This study was planned to determine the response of sorghum (Sorghum bicolor L., non-leguminous crop) and cowpea (Vigna sinensis L., leguminous crop) to boron (0, 2, 4, and 16 µg g−1) on four distinct soil series from Punjab, Pakistan i.e., Udic Haplustalf (Pindorian region), Typic Torrifluvent (Shahdra region), Halic Camborthid (Khurianwala region), and Udic Haplustalf (Gujranwala region). Overall, there was a significant difference (p < 0.05) in yield between the sorghum (3.8 to 5.5 g pot−1 of 5 kg dry soil) and cowpea (0.2 to 3.2 g pot−1 of 5 kg dry soil) in response to B application. The highest yield was observed in both sorghum and cowpea either in control or at 2 µg g−1 B application in all four soils. Cowpea showed the same yield trend in all four soils (i.e., an increase in yield at 2 µg g−1 B application, followed by a significant decrease at the higher B levels). In contrast, sorghum exhibited greater variability of response on different soils; Udic Haplustalf (Pindorian region) produced the greatest yield at low levels of B application. However, Halic Camborthid produced its lowest yield at that level. Boron concentration in shoots increased with the levels of B application, particularly in sorghum. In cowpea, the plant growth was extremely retarded—and most of the plants died at higher levels of B application even if a lower concentration of B was measured within the shoot. Hot water-extractable B was the most available fraction for cowpea (R2 = 0.96), whereas the easily exchangeable B was most available for sorghum (R2 = 0.90). Overall, these results have implications for micronutrient uptake for both leguminous and non-leguminous crops.

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Section: Discussionsupporting

confidence: 91%

Assessing Yield Response and Relationship of Soil Boron Fractions with Its Accumulation in Sorghum and Cowpea under Boron Fertilization in Different Soil Series

et al. 2021

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“…The stability of this silicon solution is partially explained by the stabilizing effect of sorbitol present in the product to guarantee successful Si foliar application [23]. This is because adding stabilizers is an e cient alternative to reduce polymerization of the silicon solution, thereby increasing Si leaf absorption in several crops [7,24,25], including cotton plants [17,23].…”

Section: Discussionmentioning

confidence: 99%

“…However, the difference between adequate concentration and B toxicity is small [1,4,5], and the toxic effect of this element can be veri ed in cotton plants when applied to leaves at high concentrations [3]. B nutritional disorder, either de ciency or toxicity, may lead to an increase in reactive oxygen species (ROS) production, causing oxidative damage to cells, as observed in beets [6] and eld peas [7]. Oxidative stress occurs when there is an imbalance between ROS production and the antioxidant defense system (enzymatic and nonenzymatic), causing oxidative damage [8,9].…”

Section: Introductionmentioning

confidence: 99%

Addition of silicon to boron foliar spray in cotton plants modulates the antioxidative system attenuating boron deficiency and toxicity

Souza

Prado

Campos

et al. 2022

Preprint

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Background: Boron (B) nutritional disorders, either deficiency or toxicity, may lead to an increase in reactive oxygen species production, causing damage to cells. Oxidative damage in leaves can be attenuated by supplying silicon (Si). The aim of this study was to assess assess the effect of increasing foliar B concentrations on cotton plants to determine whether adding Si to the spray solution promotes gains to correct deficiency and toxicity of this micronutrient by decreasing oxidative stress via synthetizing proline and glycine-betaine, thereby raising dry matter production.Results:B deficiency or toxicity increased H2O2 and MDA leaf content in cotton plants. H2O2 and MDA leaf content declined as a function of increased leaf B concentrations in the presence and absence of Si. B deficiency stood out in H2O2 and MDA production compared to its toxicity. Proline and glycine-betaine content declined as a function of the rise in B concentration. In addition, production of these nonenzymatic antioxidant compounds was greater in plants under toxicity, in relation to deficient plants. Adding Si to the B spray solution reduced H2O2 and MDA content in the plants under nutrient deficiency or toxicity. Si reduced H2O2, primarily in B-deficient plants. Si also increased proline and glycine-betaine content, mainly in plants under B toxicity. Dry matter production of B-deficient cotton plants increased up to an application of 1.2 g L-1 of B. The critical B level in the spray solution for deficiency and toxicity was observed at a concentration of 0.5 and 1.9 g L-1 of B, respectively, in the presence of Si, and 0.4 and 1.9 g L-1 of B without it. In addition, the presence of Si in the B solution raised dry matter production in all B concentrations evaluated in this study.Conclusion:Our findings demonstrated that adding Si to a B solution is important in the foliar spraying of cotton plants because it increases proline and glycine-betaine production and reduces H2O2 and MDA content, in addition to mitigating the oxidative stress in cotton plants under B deficiency or toxicity.

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“…This SA concentration (10 −2 mmol L -1 ) was previously tested in eucalyptus clonal seedlings. Laboratory tests were carried out with increasing concentrations of SA to determine the highest beneficial concentration of this element for plants without causing negative effects such as plant hormones imbalance [17].…”

Section: Experiments IImentioning

confidence: 99%

“…The role of Si as elicitors was confirmed by the greater dry matter production of eucalyptus seedlings under N deficiency and N-NH 4 + toxicity (Fig 3A and 3C). Si is absorbed by plants in the soluble form as monosilicic acid (H 2 SiO 4 ) and not eliminated by the transpiration process, mitigating the damage caused to the leaf and root cell structure [34] and favoring the photosynthetic efficiency of plants, with a consequent increase in dry mass production, as demonstrated in eucalyptus (Figs 2 and 3) and other species [17,24,25,35,36]. The beneficial effect of SA, in turn, has been related primarily to the use of low hormone concentrations [37], where higher concentrations inhibit plant growth by lowering the photosynthetic rate and Rubisco activity [38,39] The different responses are reported in terms of SA use in plants, and variations depend on the time of application, mode of use and environmental conditions.…”

Section: Plos Onementioning

confidence: 99%

Silicon fertigation and salicylic acid foliar spraying mitigate ammonium deficiency and toxicity in Eucalyptus spp. clonal seedlings

et al. 2021

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Nitrogen deficiency and toxicity, primarily in its ammonium form (NH4+), can suppress plant growth and development. The use of silicon (Si) or salicylic acid (SA) may be an alternative to minimize the harmful effects of nutrient imbalances caused by NH4+, thereby improving the photosynthetic efficiency of plants. The aim of the present study was to assess the action of fertigation-applied Si and SA foliar spraying in mitigating NH4+ toxicity and deficiency in eucalyptus clonal seedlings. Two experiments were performed with eucalyptus clonal seedlings (Eucalyptus urophylla x Eucalyptus grandis), in a greenhouse. Both were carried out using a 4x2 factorial design and four concentrations of NH4+ (5, 15, 30 and 60 mmol L-1), in the absence and presence of Si (2 mmol L-1), in experiment I; or with and without SA foliar application (10−2 mmol L-1), in experiment II, with six repetitions. Nitrogen content rose as a result of increasing N-NH4+ concentration in the nutrient solution, and Si supplied via the nutrient solution was efficient in increasing the Si content in eucalyptus seedlings. The rise in N-NH4+ concentration favored the maintenance of the photosynthetic apparatus, but high N-NH4+ concentration increased energy loss through fluorescence and decreased the efficiency of photosystem II. The addition of Si to the nutrient solution proved to be beneficial to the photosynthetic apparatus by decreasing F0 at 15 and 30 mmol L-1 of NH4+; and Fm at all NH4+ concentrations studied. In addition, the beneficial element also increases Fv/Fm at all NH4+ concentrations studied. SA foliar application was also efficient in reducing photosynthetic energy losses by decreasing F0 and Fm at all NH4+ concentrations studied. However, SA only increased the Fv/Fm at the high concentrations studied (30 and 60 mmol L-1 of NH4+). Nitrogen disorder by deficiency or N-NH4+ toxicity reduced shoot dry mass production. The addition of Si to the nutrient solution and SA foliar application increased shoot dry mass production at all N-NH4+ concentrations studied, and benefitted the photosynthetic apparatus by decreasing fluorescence and improving the quantum efficiency of photosystem II as well as dry mass production.

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Exogenous silicon and salicylic acid applications improve tolerance to boron toxicity in field pea cultivars by intensifying antioxidant defence systems

Cited by 34 publications

References 50 publications

Assessing Yield Response and Relationship of Soil Boron Fractions with Its Accumulation in Sorghum and Cowpea under Boron Fertilization in Different Soil Series

Assessing Yield Response and Relationship of Soil Boron Fractions with Its Accumulation in Sorghum and Cowpea under Boron Fertilization in Different Soil Series

Addition of silicon to boron foliar spray in cotton plants modulates the antioxidative system attenuating boron deficiency and toxicity

Silicon fertigation and salicylic acid foliar spraying mitigate ammonium deficiency and toxicity in Eucalyptus spp. clonal seedlings

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