2019
DOI: 10.1590/1807-1929/agriambi.v23n3p175-182
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Abstract: The objective of this study was to evaluate the effect of Ca and Mg silicate and B on the gas exchange, leaf water potential and chlorophyll fluorescence parameters in the sunflower variety Embrapa 122 -V2000 under water stress conditions. The trial was conducted in Red Yellow Latosol with very clayey texture, with contrasting levels of Si and B and subjected to water deficit. The experimental design was randomized blocks in a 2 4 factorial arrangement, with five replicates. Treatments consisted of the combina… Show more

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Cited by 8 publications
(4 citation statements)
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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%
“…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%
“…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%
“…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%