Photosynthetic gas exchange in leaves of wheat plants supplied with silicon and infected with Pyricularia oryzae

Rios, Jonas Alberto; Rodrigues, Fabrício Á.; Debona, Daniel; Silva, Leandro Castro

doi:10.1007/s11738-013-1418-3

Cited by 30 publications

(17 citation statements)

References 31 publications

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“…In wheat plants treated with Si at concentrations of 0 and 2 mM, there were increases in gas exchange (A, gs and E) as a function of silicon addition (Rios et al, 2014). This result corroborates with the one found in this study, since it was also verified increase in gas exchanges provided by Si at concentrations close to 2 mM (2.47 to 3.19 mM).…”

Section: Discussionsupporting

confidence: 92%

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: Discussionsupporting

confidence: 92%

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

et al. 2020

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“…Additionally, high concentration of Chl a + b would lead to an increase in the ability and efficiency of the leaves to capture energy needed for the photochemical reactions involved on photosynthesis (Buchenauer & Rohner, ). Reduction in the concentration of pigments on the leaves of soybean plants infected with P. pachyrhizi as well as for other host‐pathogen interactions such as Phakopsora pachyrhizi on soybean, Pyricularia oryzae on wheat, Stenocarpella macrospora on maize and Hemileia vastatrix on coffee has been reported (Bermúdez‐Cardona, Wordell Filho, & Rodrigues, ; Honorato Junior, Zambolim, Aucique‐Perez, Resende, & Rodrigues, ; Kumudini, Prior, Omielan, & Tollenaar, ; Rios, Rodrigues, Debona, & Silva, ).…”

Section: Discussionmentioning

confidence: 99%

Leaf gas exchange and chlorophyll a fluorescence in soybean leaves infected by Phakopsora pachyrhizi

Rios

Aucique‐Pérez

et al. 2017

Journal of Phytopathology

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Asian soybean rust (ASR), caused by Phakopsora pachyrhizi, is one of the most important foliar diseases affecting soybean production worldwide. This study aimed to investigate the photosynthetic performance (leaf gas exchange, chlorophyll (Chl) a fluorescence images and photosynthetic pigment pools) of soybean plants sprayed with Acibenzolar‐S‐Methyl (ASM) and the fungicide epoxiconazole + pyraclostrobin (Epo+Pyr) and further inoculated with P. pachyrhizi. The ASR symptoms progressed much faster on the leaves of plants from the control treatment (water spray) in comparison with the ASM and Epo+Pyr treatments. In general, the values for the leaf gas exchange parameters net carbon assimilation rate (A), stomatal conductance to water vapour (gs), internal CO2 concentration (Ci) and transpiration rate (E) increased for the infected plants sprayed with ASM or Epo+Pyr in comparison with plants from the control treatment. The values for the initial fluorescence (Fo), maximal fluorescence (Fm), maximal photosystem II quantum efficiency (Fv/Fm), effective photosystem II quantum yield (Y(II)) and quantum yield of regulated energy dissipation (Y(NPQ)) were consistently higher for the ASM and Epo+Pyr treatments in comparison with the control treatment at advanced stages of fungal infection. By contrast, the values for quantum yield of non‐regulated energy dissipation (Y(NO) were significantly lower for the ASM and Epo+Pyr treatments. The concentrations of total Chl a+b and carotenoids significantly increased for infected plants sprayed with ASM and Epo+Pyr in comparison with plants from the control treatment. The results of this study demonstrated that the spray of soybean plants with either ASM or Epo+Pyr contributed to reduce the negative effect of ASR on the photosynthesis of soybean plants.

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“…Applying silicon to saline soils resulted in reducing the amount of Na + taken up by plants leading to maintaining photosynthesis process (Wang & Han, 2007). Similarly, Rios et al (2014) found an increase in chlorophyll pigments in wheat leaves when silicon was applied. In soybean, silicon increased of photosynthetic enzymes leading to a high increase in photosynthetic pigments (Shen et al, 2010).…”

Section: Photosynthetic Parametersmentioning

confidence: 91%

Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

et al. 2017

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T HE PRESENT study was carried out to investigate the effect of high NaCl concentrations on some growth parameters and physiological processes of wheat (Triticum aestivum L.) plant. The results indicated that Gemeza.9 was the most sensitive cultivar to high salinity levels compared to all tested wheat cultivars. Moreover, salinity stress caused a reduction in the germination percentage by 65% and all growth parameters by 21%, 25% and 60% in the lengths of shoot, root and leaf area, also by 27% and 48% in fresh weights of shoot, root and 40% and 75% in dry weights of shoot and root. It also increased the activity of antioxidant enzymes (peroxidase and catalase), lipid peroxidation and ascorbic acid content. Salinity induced increase of osmolytes compounds such as total soluble proteins, carbohydrates and amino acids. Furthermore, all measured yield parameters, the percentage of grain's maturity and productivity were highly decreased. Accordingly, the role of potassium humate and potassium silicate either sole or combined in alleviating the toxic effect of salinity was also studied. Results showed that application of potassium humate as sole had a stimulatory effect higher than potassium silicate or their combination. It increased the germinating percentage by 128% at 200mM NaCl. In addition, potassium humate and potassium silicate increased the photosynthetic activity, decreased the activity antioxidant enzymes (Peroxidase and Catalase) as well as biosynthesis of MDA and ascorbic acid also they induced increase biosynthesis of proteins and carbohydrates in yielded grains. Accordingly, our study recommends the application of potassium humate as an organic fertilizer and potassium silicate as a foliar spray for improving the quality and quantity of the sensitive wheat cultivar Gemeza.9 cultivated in salty lands and increases its productivity.

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Photosynthetic gas exchange in leaves of wheat plants supplied with silicon and infected with Pyricularia oryzae

Cited by 30 publications

References 31 publications

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

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

Leaf gas exchange and chlorophyll a fluorescence in soybean leaves infected by Phakopsora pachyrhizi

Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

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