Manuela Simões’s research while affiliated with Universidade NOVA de Lisboa and other places

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Publications (5)


Cont.
Pearson (lower half) and Spearman (upper half) correlations between Cu concentrations measured in soils and those in plant organs (tubers, roots, stems, and leaves) in the 27 pots.
Average quotients between Cu, Pb, and As contents in plant organs (tubers, roots, stems, and leaves) and those in substrates (average between values before planting and after harvest, carried out with the mean value of 9 pots).
Composition of the different substrates in the pots of the experimental design and respective formulations.
Impact of Deactivated Mine Waste Substrates on the Growth and Cu, As and Pb Accumulation in Tubers, Roots, Stems and Leaves of Three Solanum tuberosum L. Varieties
  • Article
  • Full-text available

January 2025

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7 Reads

Plants

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Manuela Simões

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Fernando Lidon

Potato (Solanum tuberosum L.) is the world’s third most popular vegetable in terms of consumption and the fourth most produced. Potatoes can be easily cultivated in different climates and locations around the globe and often in soils contaminated by heavy metals due to industrial activities. This study assessed heavy metal accumulation in different organs of three S. tuberosum L. varieties (Agria, Désirée, and Red Lady) grown in different substrate formulations containing slag and waste from the Caveira polymetallic sulfite mine in Portugal. Results reveal that Cu, Pb, and As accumulation in the different organs of the plant depends on variety and substrate formulation, with tubers exceeding reference values from the literature. Tubers accumulated less Cu (varying between 17.3 and 32 mg/kg), Pb (varying between 5 and 27.6 mg/kg) and As (varying between 4 and 14.8 mg/kg) compared to other plant organs, and the Désirée variety exhibited high Pb (with a maximum of 27.6 mg/kg) accumulation in tubers compared to the remaining varieties. Although the phenological development of plants was not impacted, substrate formulation played a critical role in the plant’s metal uptake. The Agria variety presented a lower contamination risk in tubers, but potato cultivation in contaminated soils can present a risk to human health.

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Figure 2. Average (µg g −1 ) ± standard error (n = 3) of Selenium, Zinc, Manganese, Iron, Potassium, Phosphorus, and Calcium concentrations in the brown rice grains. Letters a, b, and c indicate significant differences between treatments, for each variety (p ≤ 0.05).
Average of color parameters ± standard error (n = 4) in brown rice grains and respective flours in Ariete and Ceres varieties L. (brightness), a* (red and green transitions) and b* (yellow and blue transitions).
Average (%) ± standard error (n = 4) of protein content in whole rice flour submitted to foliar pulverization of sodium selenate and sodium selenite.
Elemental Composition and Implications on Brown Rice Flour Biofortified with Selenium

April 2023

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122 Reads

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1 Citation

Plants

Rice (Oryza sativa L.) is one of the most economically and socially important cereals in the world. Several strategies such as biofortification have been developed in a way eco-friendly and sustainable to enhance crop productivity. This study implemented an agronomic itinerary in Ariete and Ceres rice varieties in experimental fields using the foliar application of selenium (Se) to increase rice nutritional value. At strategic phases of the plant’s development (at the end of booting, anthesis, and at the milky grain stage), they were sprayed with sodium selenate (Na2SeO4) and sodium selenite (Na2SeO3). In the first foliar application plants were sprayed with 500 g Se·ha−1 and in the remaining two foliar applications were sprayed with 300 g Se·ha−1. The effects of Se in the level of micro and macronutrients in brown grains, the localization of Se in these grains, and the subsequent quality parameters such as colorimetric characteristics and total protein were considered. After grain harvesting, the application of selenite showed the highest enrichment in all grain with levels reaching 17.06 µg g−1 Se and 14.28 µg g−1 Se in Ariete and Ceres varieties, respectively. In the Ceres and Ariete varieties, biofortification significantly affected the K and P contents. Regarding Ca, a clear trend prevailed suggesting that Se antagonizes the uptake of it, while for the remaining elements in general (except Mn) no significant differences were noted. Protein content increased with selenite treatment in the Ariete variety but not in Ceres. Therefore, it was possible to conclude, without compromising quality, that there was an increase in the nutritional content of Se in brown rice grain.




Citations (3)


... Rice flour is a valuable ingredient with significant nutritional benefits and economic importance. Research has shown that rice flour is a glutenfree alternative with high nutritional value, containing a balanced complex of proteins, lipids, minerals, and vitamins (Marques et al., 2023). It is particularly rich in high-grade protein with a good balance of amino acids, making it a suitable dietary option for various populations, including the elderly, who may be at risk of protein-energy malnutrition (Tumenova & Myktabayeva, 2023). ...

Reference:

Quality Attributes and Consumer Acceptability of Chinchin Produced from Blends of Rice, Cowpea, and Sweet Potato Flours
Elemental Composition and Implications on Brown Rice Flour Biofortified with Selenium

Plants

... Agronomic biofortification in tomato crops has been performed in different cultivars, in conventional or organic producing modes with different mineral elements such as Mg and Se [13,14] and in some cases with Fe and Zn [15,16]. ...

Can Natural Fortification Increase Fe and Zn Content in Organically Grown Tomatoes?

... Kumsa et al. (2019), indicate that the foliar application of Mg increased its content in Italian ryegrass (Lolium multiflorum L.), as the application rate of Mg fertilizers increased for all cultivars, with increases from 85 to 140 %, with a rate of application of 1500 μM of MgCl2. Tomatoes (Lycopersicum esculentum L.) biofortified with Mg showed an increase in Mg content of 2.1% with respect to the control (Coelho et al., 2022). Based on these results, it can be deduced that the main growth indicators such as biomass and yield were favorable for the high doses of NanoMg (200 ppm). ...

Mineral Interaction in Biofortified Tomatoes (Lycopersicum esculentum L.) with Magnesium