ORCID Profile
0000-0002-7387-0125
Current Organisation
Hungarian University of Agriculture and Life Sciences
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Publisher: Springer Science and Business Media LLC
Date: 24-06-2022
Publisher: Springer Science and Business Media LLC
Date: 05-05-2023
Publisher: Atena Editora
Date: 03-12-2019
Publisher: Springer Science and Business Media LLC
Date: 29-03-2022
Publisher: Springer Science and Business Media LLC
Date: 14-07-2022
DOI: 10.1186/S12870-022-03721-7
Abstract: 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 the effect of increasing foliar B accumulation 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. B deficiency or toxicity increased H 2 O 2 and MDA leaf concentration in cotton plants. H 2 O 2 and MDA leaf concentration declined, with quadratic adjustment, as a function of increased leaf B accumulation. Proline and glycine-betaine leaf concentration increased under B-deficiency and B-toxicity. 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 H 2 O 2 and MDA concentration in the plants under nutrient deficiency or toxicity. Si reduced H 2 O 2 , primarily in B-deficient plants. Si also increased proline and glycine-betaine concentration, 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. 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 H 2 O 2 and MDA concentration, in addition to mitigating the oxidative stress in cotton plants under B deficiency or toxicity.
Publisher: Informa UK Limited
Date: 17-12-2021
Publisher: Czech Academy of Agricultural Sciences
Date: 28-02-2021
Publisher: Elsevier BV
Date: 11-2022
Publisher: Atena Editora
Date: 13-03-2020
Publisher: Public Library of Science (PLoS)
Date: 22-04-2021
DOI: 10.1371/JOURNAL.PONE.0250436
Abstract: Nitrogen deficiency and toxicity, primarily in its ammonium form (NH 4 + ), 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 NH 4 + , 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 NH 4 + 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 NH 4 + (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-NH 4 + 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-NH 4 + concentration favored the maintenance of the photosynthetic apparatus, but high N-NH 4 + 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 F 0 at 15 and 30 mmol L -1 of NH 4 + and F m at all NH 4 + concentrations studied. In addition, the beneficial element also increases F v /F m at all NH 4 + concentrations studied. SA foliar application was also efficient in reducing photosynthetic energy losses by decreasing F 0 and F m at all NH 4 + concentrations studied. However, SA only increased the F v /F m at the high concentrations studied (30 and 60 mmol L -1 of NH 4 + ). Nitrogen disorder by deficiency or N-NH 4 + 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-NH 4 + concentrations studied, and benefitted the photosynthetic apparatus by decreasing fluorescence and improving the quantum efficiency of photosystem II as well as dry mass production.
Publisher: Springer Science and Business Media LLC
Date: 24-07-2021
Publisher: Elsevier BV
Date: 2021
Publisher: Elsevier BV
Date: 09-2020
Location: Australia
Location: Hungary
No related grants have been discovered for Kevein Ruas de Oliveira.