Silicon and boron mitigate the effects of water deficit on sunflower

Neves, José Maria Gomes; Aquino, Leonardo Ângelo de; Berger, Paulo Geraldo; Neves, Júlio C. L.; Rocha, Gabriel Cipriano; Barbosa, Edimilson Alves

doi:10.1590/1807-1929/agriambi.v23n3p175-182

Cited by 9 publications

(5 citation statements)

References 16 publications

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“…According to these same authors, these increases in fluorescence may be related to the higher content of chlorophyll in the reaction centers as a function of the N doses. Based on the F v /F m results, it can be stated that the N combined with Si induced a better energy stability compared to the treatments that did not contain Si (0.81), which is within those indicated as normal (between 0.75 and 0.85) in non-stressed plants (Neves et al, 2019).…”

Section: Resultssupporting

confidence: 53%

Chlorophyll a fluorescence and development of zucchini plants under nitrogen and silicon fertilization

et al. 2020

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Zucchini (Cucurbita pepo L.) has a great economic and productive potential in the semi-arid region of Brazil, due to the wide acceptance by consumers and quick financial return. The nitrate (NO3-) assimilation process in C3 plants such as zucchini is related to photorespiration, and Si accumulated near the stomata reduces the transpiration rate, making the photosynthesis cycle more efficient. The objective of this study was to evaluate the interaction between nitrogen and silicon fertilization ongrowth, chlorophyll index, and chlorophyll a fluorescence of zucchini plants. The treatments were distributed in a split-plot scheme in a randomized block design with three replicates. The plot was arranged by silicon levels (0 and 6 g/plant) and the subplots constituted by five nitrogen levels (30, 60, 90, 120 and 150 kg ha-1). Leaf, stem and total dry masses, chlorophylla, chlorophyll b, total chlorophyll, chlorophyll a/b ratio and chlorophyll a fluorescence were evaluated. The highest dry matter productions in zucchini were obtained in treatments without Si. Si and N application together positively influences the chlorophyll a/b ratio of zucchini plants. The interaction between Si and N positively influences the maximum fluorescence, variable fluorescence and quantum yield of photosystemII of zucchini plants.

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Section: Resultssupporting

confidence: 53%

Chlorophyll a fluorescence and development of zucchini plants under nitrogen and silicon fertilization

et al. 2020

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“…Results that validate those obtained by Magalhaes et al [21], values of 0.78 for quantum efficiency of FSII in the level of 125% Etc found in common bean (Phaseolus vulgaris L.). Neves et al [22] observed in sunflower (Helianthus annuus), values within the tolerable limits (0.75-0.85) of plants grown under ideal conditions of water regime.…”

Section: Resultsmentioning

confidence: 93%

Fluorescence and Growth of Eggplant under Irrigation Levels and Silicon Doses

Fátima

Nóbrega

Carreiro

et al. 2019

JEAI

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Aims: The study was conducted to evaluate the fluorescence and growth of eggplant under influence of water deficit and silicon doses. Study Design: The design was a randomized complete block design, in a 5 x 2 factorial arrangement, with four replications and one plant per plot, totaling 40 experimental units. Length and Place of Study: The research was implemented between September and November 2016, in a greenhouse of the Center of Science and Technology Agrifood, at the Federal University of Campina Grande (UFCG / CCTA), Campus of Pombal-PB, Brazil. Methods: Doses of 0, 75, 150, 225 and 300 mg L-1 of silicon and the irrigation slides of 50 and 100% of real evapotranspiration - ETr were used, which were obtained by weighing the pots daily in order to keep the weight close to the field capacity. Results: The use of 50% level of the ETr provides reductions of 5.58; 7.92 and 6.84% of fluorescence in the initial, maximum and quantum yield of the photosystem. The fresh and dry mass of the stem presented the maximum productivity (140.8 and 48.1 g) in the plants irrigated with 100% Etr and treated with doses of 106 and 110 mg L-1 of Si. Conclusion: The fluorescence and biomass of the eggplant plants is reduced with the decrease in irrigation level; while the application of silicon does not result in increment in the fluorescence and dry mass of the leaf. The 100% irrigation level of the ETr associated with the application of 108 mg L-1 of silicon resulted in the best results in stem mass accumulation.

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“…In the plant, Si acts by providing greater tissue rigidity (Lima et al, 2019), increasing nutritional and photosynthetic efficiency and stomatal regulation due to hormonal signals (Santos et al, 2022b). Furthermore, this element correlates with phytohormone signaling, gene expression, and other benefits to the antioxidant system of plants (Manivannan and Ahn, 2017;Neves et al, 2019), as a protective mechanism against to stressed conditions. SA, a phytohormone of a phenolic nature, is important elicitor for maintaining photochemical activities in photosystem II, and gas exchange contributed for photosynthetic performance, in addition of acting on growth and increasing antioxidant enzymes so as to Red Latosol [Santos et al (2018), Brazilian Classification] of clayey texture, corresponding to Oxisols soil USDA classification staying for 30 days after transplant with daily irrigations and 50% shading, characterizing the acclimatization period, with height of 20.0 cm (Figure 1d).…”

Section: Fruits Collection and Seedlings Formationmentioning

confidence: 99%

Does silicon and salicylic acid contribute in the morphophysiology of Schinus terebinthifolia seedlings under flooding?

et al. 2023

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Flooding can damage the photosynthetic apparatus and initial growth of Schinus terebinthifolia. We aimed this study evaluates the potential of silicon (Si) and salicylic acid (SA) as mitigating agents on the ecophysiological responses and initial growth of S. terebinthifolia subjected to flooding periods. Seedlings were grown under the following conditions: 1) control (non-flooded): daily irrigation, 2) Flooded (F): storage of seedlings in a 500 L plastic pool, keeping the water depth at ± 2.0 cm above the substrate level, 3) F + 1.0 mM Si, 4) F + 2.0 mM Si, 5) F + 1.5 mM SA, and 6) F + 3.0 mM SA, and evaluated to 15 and 30 days. We observed that flooded seedlings formed hypertrophied lenticels on the stem on the 7th day as a stress adjustment strategy. S. terebinthifolia is sensitive to flooding, although it maintains a stable gas exchange for up to 15 days in this condition. The applications of 1.0 mM Si mitigated the pronounced decrease of gas exchange by 30 days. Using 1.0 mM Si and 3.0 mM SA contributed for integrity of the photosynthetic apparatus and to photochemical activities in the reaction centers, in addition favors to higher seedling biomass and quality under flooding. Foliar application of Si and SA is promising practice for photosynthetic metabolic and initial growth of S. terebinthifolia seedlings under flooded stress.

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Silicon and boron mitigate the effects of water deficit on sunflower

Cited by 9 publications

References 16 publications

Chlorophyll a fluorescence and development of zucchini plants under nitrogen and silicon fertilization

Chlorophyll a fluorescence and development of zucchini plants under nitrogen and silicon fertilization

Fluorescence and Growth of Eggplant under Irrigation Levels and Silicon Doses

Does silicon and salicylic acid contribute in the morphophysiology of Schinus terebinthifolia seedlings under flooding?

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