Clorofila a e b de Tomateiro Tratado com Silicato de Potássio e Fungicida

Rodrigues, Carlos Ribeiro; Rodrigues, Tatiana Michlovská; Luz, José Magno Queiróz; Sousa, Vitor Boaventura F; Sousa, Jackellyne Bruna; Nunes, Ana Carolina Pacheco; Trindade, Polyanna Ribeiro

doi:10.14688/1984-3801/gst.v9n2p54-64

Cited by 13 publications

(11 citation statements)

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“…The use of silicon resulted in increased chlorophyll 'a' and total chlorophyll for lettuce plants (Figures 4A and C). It has also been observed in wheat (Rios et al, 2014) and tomato plants (Rodrigues et al, 2016) under dry conditions. This may be related to the increase in characteristics such as gas exchange, water absorption potential and reduction of oxidative stress.…”

Section: Discussionmentioning

confidence: 72%

Can silicon (Si) influence growth, physiology and postharvest quality of lettuce?

et al. 2020

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Although it is not considered an essential element for plants, silicon (Si) provides benefits for several species, especially grasses, such as increase in yield and resistance to pests and diseases, reducing the effects of salt and water stress, among others. The aim of this study was to evaluate the effect of silicon on the performance of lettuce in hydroponic system. The experiment was carried out in a completely randomized design, with five doses of silicon (0, 2, 4, 6, 8 mM) in the nutrient solution. Shoot fresh and dry mass, gas exchanges, photosynthetic pigments and post-harvest were evaluated. It was observed that from the dose of 2 mM, there was a reduction in most variables. The dose of 0.4 mM [(-0.572)/(2*-0.7055)] provided a greater increase in shoot fresh mass. The highest photosynthetic rate was at the dose of 3.19 mM. Soluble solids, titratable acidity and pH were higher at the 4 mM dose. Silicon provides better lettuce production, with a dose of 0.4 mM allowing a greater shoot fresh mass, being the most indicated for lettuce cultivation in hydroponic system.

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Section: Discussionmentioning

confidence: 72%

Can silicon (Si) influence growth, physiology and postharvest quality of lettuce?

et al. 2020

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“…Corroborating this statement, Ávila et al (2010) report a leaf chlorophyll synthesis increase in silicon-fertilized rice plants (Oryza sativa L.), especially at high doses of nitrogen. Contrary to this, Rodrigues et al (2016) state that increased potassium silicate doses provide increases in chlorophyll a levels in tomato plants (Solanum lycopersicum L.) under high and low light conditions. However, the increase in chlorophyll a/b ratio may be associated with the greater synthesis of chlorophyll a, which is an indication that the plant was not experiencing stress.…”

Section: Resultsmentioning

confidence: 84%

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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“…In a study carried out using rice, it was determined that the application of Si raised the levels of chlorophyll a and chlorophyll b, with an impact on the productive components (ÁVILA et al, 2010). In tomatoes, silicon fertilization (K 2 SiO 3 ) incremented the levels of chlorophyll a (RODRIGUES et al, 2016). Silicate fertilization correlated at different levels according to the water conditions (Table 2).…”

Section: Resultsmentioning

confidence: 94%

“…Under such conditions, crops tend to change morphological characteristics by changing leaf insertion angle, reducing transpiration through the regulation of the stomatal opening, and modifying leaf pigment contents to adapt to conditions to allow maximum efficiency in the use of resources (FRANÇA et al, 2017;MARQUES et al, 2011;TAIZ et al, 2017). Such responses to stress conditions (biotic or abiotic) can be mitigated by using beneficial elements such as silicon (BARRETO et al, 2017;CURVELO et al 2017;RODRIGUES et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

SPAD index and leaf pigments in cauliflower in different water conditions and silicon fertilization

Wenneck

Saath

Rezende

et al. 2021

Reveng

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The measurement of leaf pigments using non-destructive methods can be influenced by water management conditions and the use of nutrients in cauliflower, not showing adequate correlations with chlorophyll contents. The objective of this study was to evaluate the correlation between the SPAD index and the pigment content in cauliflower leaves managed with different water conditions and the application of silicon (Si). The cultivation was carried out in a protected environment in the city of Maringá, Paraná State from October 2019 to March 2020. It was adopted a randomized block design, with treatments in a 3 x 4 factorial scheme, with three levels of water recharge (40; 70 and 100% of crop evapotranspiration (ETc)) and four doses of Si (0; 50; 100 and 150 kg ha-1), with four replications. Once plants showed developed inflorescence, the SPAD index was determined in the field and the levels of chlorophyll a, chlorophyll b, and carotenoids in the laboratory using leaves from the upper third. The correlation between water recharge and Si fertilization on the SPAD index was determined. The proportion of carotenoids in relation to total pigments was compared under different conditions. Correlation analysis was performed considering silicon fertilization, water recharge, leaf pigments, and the SPAD index. Silicon fertilization reduced the levels of carotenoids in addition to being related to chlorophyll a (100% of ETc) and chlorophyll b (70% of ETc). The correlation of the SPAD index with pigments is variable with the water condition of the crop, in a condition without water deficit, it is related to chlorophyll a and in a condition of 70% replacement of ETc, it is correlated with chlorophyll b.

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Clorofila a e b de Tomateiro Tratado com Silicato de Potássio e Fungicida

Cited by 13 publications

References 1 publication

Can silicon (Si) influence growth, physiology and postharvest quality of lettuce?

Can silicon (Si) influence growth, physiology and postharvest quality of lettuce?

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

SPAD index and leaf pigments in cauliflower in different water conditions and silicon fertilization

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