Selenium fortification of hydroponically grown corn salad (Valerianella locusta)

2015 ◽  
Vol 66 (11) ◽  
pp. 1128 ◽  
Author(s):  
Nicola Tomasi ◽  
Roberto Pinton ◽  
Stefano Gottardi ◽  
Tanja Mimmo ◽  
Matteo Scampicchio ◽  
...  
Keyword(s):  
Amino Acids ◽  
Nutritional Value ◽  
Narrow Range ◽  
Essential Element ◽  
Leafy Vegetables ◽  
Nitrate Content ◽  
Protein Thiols ◽  
Pigment Contents ◽  
Hydroponically Grown ◽  
Edible Parts

There is increasing interest in the hydroponic technology to produce leafy vegetables for ready-to-eat salads. Optimisation of the growing system can lead to higher yield and/or improved nutritional value of the product. Selenium (Se) is an essential element for animal and humans, with quite a narrow range between deficiency and toxicity, whereas it is assumed beneficial for plants. In the present study, two cultivars (Gala and Baron) of corn salad (Valerianella locusta (L.) Laterr.) were used to test the possibility to increase Se content in the edible parts (leaves). Effects on yield, nitrate content, and accumulation of sulfur (S) and S-containing amino acids and Se and Se-containing amino acids were studied. Results showed that corn salad tolerates selenate (Na2SeO4) concentrations ranging from 10 to 40 µm in the nutrient solution, with plants accumulating Se at levels compatible with the need in human diets at 10 µm selenate. Se-treated plants showed some benefits with respect to a decrease of nitrate concentration and increase of pigment contents (chlorophylls and carotenoids). At 10 µm selenate, Se-cysteine and Se-methionine were produced, without affecting non-protein thiols or cysteine and methionine contents. At the higher Se supply, sulfate accumulated in the leaves with a parallel decrease in the amount of S-amino acids and a rise in the relative amount of Se-amino acids. Based on the chemical analyses, cv. Gala showed better tolerance than cv. Baron to moderate selenate supply (40 µm).

scholarly journals Selenium Enrichment Enhances the Quality and Shelf Life of Basil Leaves

Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 801 ◽  
Author(s):  
Martina Puccinelli ◽  
Beatrice Pezzarossa ◽  
Irene Rosellini ◽  
Fernando Malorgio
Keyword(s):  
Antioxidant Capacity ◽  
Shelf Life ◽  
Nutritional Value ◽  
Selenium Concentration ◽  
Leafy Vegetables ◽  
Plant Tissues ◽  
Daily Consumption ◽  
Crop Cycle ◽  
Hydroponically Grown

The biofortification of leafy vegetables with selenium (Se) is a good way to increase human dietary Se intake. In addition, selenium delays plant senescence by enhancing the antioxidant capacity of plant tissues, decreasing postharvest losses. We investigated the effects of selenium addition on the production and quality of sweet basil (Ocimum basilicum) leaves of two harvesting phases, hereafter referred to as cuts, during the crop cycle. Plants were hydroponically grown and treated with 0 (control), 4, 8 and 12 mg Se L−1 as selenate. To evaluate the growth, nutritional value and quality of the basil leaves, selected qualitative parameters were determined at harvest and after five days of storage. Application of Se at varying rates (4, 8 and 12 mg L−1) was associated with an increased leaf selenium concentration in the first, but not the second cut. The application of Se significantly affected the antioxidant capacity as well as the total phenol and rosmarinic acid contents at harvest. The reduction in ethylene production observed in the plants at 4 mg Se L−1 after five days of storage suggests that this Se treatment could be used to prolong and enhance the shelf-life of basil. The daily consumption of 10 g of Se-enriched basil leaves, which, as an example, are contained in a single portion of Italian pesto sauce, would also satisfy the recommended selenium supplementation in humans.

Screening of amino acid constituents from date palm fruits

2016 ◽  
Vol 5 (10) ◽  
pp. 4972
Author(s):  
Lata Birlangi
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
United Arab Emirates ◽  
Nutritional Value ◽  
Date Palm ◽  
Amino Acid Content ◽  
Essential Amino Acids ◽  
Cultivated Plants ◽  
Palm Fruits ◽  
Social Part

The date palm (Phoenix dactylifera L.) is one of mankind’s oldest cultivated plants. The fruit of the date palm is an important crop of the hot arid and semi-arid regions of the world. It has always played a genuine economic and social part in the lives of the people of these areas. The present objective in examining the amino acid content of different varieties of date palm fruits from Middle-East region; is to determine whether its protein could effectively supplement the nutritional value and it is also aimed in finding which variety is rich in number of amino acids. The phytochemical screening revealed the presence of eight essential amino acids and five non-essential amino acids in the date fruits. Among all the date fruit varieties taken as samples for the study, Dabbas cultivar of United Arab Emirates found to exhibit eight types of amino acids which includes five as non-essential ones. Total of thirteen amino acids were detected in the seven date cultivars. Determination of amino acid can serve as a guide to the possible nutritional value.

scholarly journals EC Sensitivity of Hydroponically-Grown Lettuce (Lactuca sativa L.) Types in Terms of Nitrate Accumulation

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 315
Author(s):  
Noémi Kappel ◽  
Ildikó Fruzsina Boros ◽  
Francia Seconde Ravelombola ◽  
László Sipos
Keyword(s):  
Lactuca Sativa ◽  
Nitrate Content ◽  
Saline Condition ◽  
Fresh Weight ◽  
Nitrate Level ◽  
Nitrate Accumulation ◽  
Strong Negative Correlation ◽  
Lactuca Sativa L ◽  
Hydroponically Grown ◽  
European Markets

The goal of this research was to investigate the effect of electrical conductivity (EC) levels of the nutrient solution on the fresh weight, chlorophyll, and nitrate content of hydroponic-system-grown lettuce. The selected cultivars are the most representative commercial varieties grown for European markets. Seven cultivars (‘Sintia,’ ‘Limeira,’ ‘Corentine,’ ‘Cencibel,’ ‘Kiber,’ ‘Attiraï,’ and ‘Rouxaï’) of three Lactuca sativa L. types’ (butterhead, loose leaf, and oak leaf) were grown in a phytotron in rockwool, meanwhile the EC level of the nutrient solutions were different: normal (<1.3 dS/m) and high (10 dS/m). The plants in the saline condition had a lower yield but elevated chlorophyll content and nitrate level, although the ‘Limeira’ and ‘Cencibel’ cultivars had reduced nitrate levels. The results and the special characteristic of the lollo-type cultivars showed that the nitrate level could be very different due to salinity (‘Limeira’ had the lowest (684 µg/g fresh weight (FW)) and ‘Cencibel’ had the highest (4396 µg/g FW)). There was a moderately strong negative correlation (−0.542) in the reverse ratio among the chlorophyll and nitrate contents in plants treated with a normal EC value, while this relationship was not shown in the saline condition. Under the saline condition, cultivars acted differently, and all examined cultivars stayed under the permitted total nitrate level (5000 µg/g FW).

scholarly journals Nutrient Solution Deprivation as a Tool to Improve Hydroponics Sustainability: Yield, Physiological, and Qualitative Response of Lettuce

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1469
Author(s):  
Michele Ciriello ◽  
Luigi Formisano ◽  
Antonio Pannico ◽  
Christophe El-Nakhel ◽  
Giancarlo Fascella ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Potential Effect ◽  
Quality Parameters ◽  
Leafy Vegetables ◽  
Nitrate Content ◽  
Yield Reduction ◽  
Quality Performance ◽  
Floating Raft ◽  
Amino Acids Profile ◽  
Excessive Nutrients

Hydroponics growing systems often contain excessive nutrients (especially nitrates), which could lead to a quality loss in ready-to-eat leafy vegetables and posing a health risk to consumers, if managed inadequately. A floating raft system was adopted to assay the production and quality performance of lettuce (Lactuca sativa L. cv ‘Maravilla De Verano Canasta’) deprived of the nutrient solution by replacement with only water, three and six days before harvest. Yield and quality parameters, mineral composition, pigments, organic acids, amino acids profile, soluble proteins, and carbohydrate content were determined. Nutrient solution deprivation six days before harvest resulted in a significant reduction in leaf nitrate (−53.3%) concomitant with 13.8% of yield loss, while plants deprived of nutrient solution three days before harvest increased total phenols content (32.5%) and total ascorbic acid (102.1%), antioxidant activity (82.7%), anthocyanins (7.9%), sucrose (38.9%), starch (19.5%), and γ-aminobutyric acid (GABA; 28.2%), with a yield reduction of 4.7%, compared to the control. Our results suggest that nutrient solution deprivation three days before harvest is a successful strategy to reduce nitrate content and increase the nutritional quality of lettuce grown in floating raft systems with negligible impact on yield. These promising results warrant further investigation of the potential effect of nutrient solution deprivation on the quality attributes of other leafy vegetables cultivated in floating raft systems and in a “cascade” growing system.

The use of hydroxyproline analyses to predict the nutritional value of the protein in different animal tissues

1972 ◽  
Vol 27 (3) ◽  
pp. 475-481 ◽  
Author(s):  
Z. Dvořák
Keyword(s):  
Amino Acids ◽  
Nutritional Value ◽  
Amino Acid Content ◽  
Close Correlation ◽  
Regression Equations ◽  
Animal Tissues ◽  
Chemical Score ◽  
Limiting Amino Acids ◽  
Net Protein ◽  
Total Amino Acids

1. The amounts of available cystine and tyrosine in the protein of different animal tissues showed a close correlation with the level of hydroxyproline, and may be estimated from hydroxyproline values by regression equations.2. Estimates of ‘chemical score’ have been calculated from the content of hydroxyproline determined in a series of samples for which net protein utilization (NPU) for rats had also been determined. Chemical scores calculated as percentages of the total ‘essential+semiessential’ amino acid content of each material correlated closely with NPU, whereas scores calculated as percentages of total amino acids did not. ‘Methionine+cystine’ were calculated to be first limiting amino acids in every sample.

scholarly journals Proximate Composition and Its Seasonality of the Mediterranean Green Crab:Carcinus aestuariiNardo, 1847 (Brachyura, Portunidae), in Southern Tunisian Waters (Central Mediterranean)

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Sonia Baklouti ◽  
Abdelkarim Derbali ◽  
Khalifa Dhieb ◽  
Wassim Kammoun ◽  
Othman Jarboui
Keyword(s):  
Proximate Composition ◽  
Nutritional Value ◽  
Central Mediterranean ◽  
Potential Health ◽  
Lipid Contents ◽  
Size Groups ◽  
The Mediterranean ◽  
And Gender ◽  
Edible Parts

The Mediterranean green crabCarcinus aestuariiwas recorded in Tunisian waters several years ago. However, since its record in the Gulf of Gabes, no studies have been carried out about the spread of this crab. Because there is a lack of nutritional information concerning this species, this study aimed to characterize the chemical composition of hepatopancreas and gonads ofCarcinus aestuariiin view of potential health implication for consumers and to determine the seasonal nutritional quality of females and males taken separately for various size groups. In this study, a total of 1399 individuals were collected along the Sfax coast. The nutritional value of various edible parts ofCarcinus aestuariiwas evaluated, and gender differences in terms of edible yield and proximate composition, protein, mineral, lipid, and water content, were compared for season, age, and sex. The biochemical compositions were strongly influenced by sex, age, and seasons. The highest protein and lipid contents were detected in gonads and hepatopancreas of females. Autumn was the season with the highest protein content and lowest fat content. Therefore, people with particular diets constrains should consume the ovaries of females in autumn and it should moderate in winter. The hepatopancreas and gonads from Tunisian waters can be a good source of proteins and mineral.

FACTORS INFLUENCING THE NUTRITIONAL VALUE OF FISH FLOUR: III. FURTHER STUDIES ON AVAILABILITY OF AMINO ACIDS

1963 ◽  
Vol 41 (7) ◽  
pp. 1589-1594 ◽  
Author(s):  
A. B. Morrison
Keyword(s):  
Amino Acids ◽  
Nutritional Value ◽  
Chloride Content ◽  
In Vitro Digestion ◽  
Amino Acid Mixture ◽  
Acid Mixture ◽  
Deficient Diet ◽  
Weight Gains ◽  
Flour Sample

Weight gains of male weanling rats given fish flour sample X were significantly increased by addition to the diet of methionine, histidine, threonine, and tryptophan. When histidine or methionine were omitted from the amino acid mixture, weight gains were similar to those found with the unsupplemented flour, and the combination of methionine and histidine was as effective as the four amino acids. Supplements of histidine and methionine had no effect on weight gains of rats given fish flour sample CFF, which was of high nutritional value. Sample X contained methionine in an amount similar to that of sample CFF, and somewhat less histidine. The amounts of methionine and histidine released during in vitro digestion with pancreatin were much less for sample X than for sample CFF. Steaming sample X for 30 minutes significantly increased its gross protein value determined in a methionine-deficient diet, but had no effect on the total or organic chloride content. It was concluded that sample X contained unavailable methionine and histidine.

scholarly journals Gemar Makan Ikan untuk Kecerdasan Anak Sekolah di MTS Al-Maidar Pandan Kabupaten Tapanuli Tengah

2021 ◽  
Vol 6 (3) ◽  
pp. 455-464
Author(s):  
Emma Suri Yanti Siregar ◽  
Tengku Muhammad Ghazali ◽  
Rosmasita Rosmasita ◽  
Dian Fitria ◽  
Juliana Pebrina Siburian ◽  
...  
Keyword(s):  
Amino Acids ◽  
Young People ◽  
Natural Resources ◽  
Protein Content ◽  
Community Service ◽  
Fish Consumption ◽  
Nutritional Value ◽  
Daily Consumption ◽  
High Protein Content ◽  
Service Activity

 Indonesia is a maritime country that has many marine natural resources. Central Tapanuli Regency has a position close to the sea. Even though fish has a high protein content with amino acids, students or young people still like to eat fish a little. So it is necessary to provide information and at the same time invite the younger generation to like to eat fish to increase their intelligence. This community service activity was carried out at MTS Al-Maidar Pandan, Pandan District, Central Tapanuli Regency. The method of implementing this service activity is done by providing socialization about the importance of eating fish for MTS Al Maidar students. The outcomes achieved are increasing students' knowledge about the benefits of fish consumption and the nutritional value contained in fish as well as providing students' understanding with the knowledge to be able to distinguish between fish that are suitable for daily consumption or not.

scholarly journals Potential Toxicity of Some Traditional Leafy Vegetables Consumed in Nyang’oma Division, Western Kenya

2005 ◽  
Vol 5 (8) ◽  
pp. 01-13
Author(s):  
Orech FO ◽  
◽  
Treza Akenga ◽  
J Ochora ◽  
H Friis ◽  
...  
Keyword(s):  
Nutritional Value ◽  
Lake Victoria ◽  
Leafy Vegetables ◽  
Human Beings ◽  
Laboratory Procedure ◽  
Amaranthus Hybridus ◽  
Western Kenya ◽  
Sida Acuta ◽  
Long Span ◽  
Aerial Parts

Traditional leafy vegetables are those plants leaves or aerial parts have been integrated in a community’s culture for use as food over a long span of time. These vegetables are highly recommended due to their relatively high nutritional value compared to the introduced varieties, and are also important in food security. Qualitative phytochemical screening, using standard laboratory procedure, was carried out for alkaloids, saponins, cardenolides, flavonoids and polyphenols on traditional leafy vegetables consumed amongst the Luo, an agro-pastoral community living along the shores of lake Victoria, Western Kenya. The vegetables included: Amaranthus hybridus L. (subsp.hybridus), Asystasia mysorensis T. Anderson, Coccinia grandis (L) Voigt, Crotalaria ochroleuca (Kotschy) Polhill, Cucurbita maxima Duchesne ex Lam, Portulaca quadrifida L., Sesamum calycimum Welw. var. angustifolium (Oliv.) Ihlenf. and Siedenst., Senna occidentalis L. and Sida acuta Burm. F. All the vegetables were found to contain polyphenols and flavanoids while other classes of phytochemicals varied from species to species. Brine shrimp lethality tests revealed that S. calycimum var. angustifolium (LC50 84.8 g/ml), S. occidentalis (LC50 99.5 g/ml), S. acuta (LC50 99.4 g/ml), C. grandis (LC50 100.6 g/ml) and A. mysorensis (LC50 207.7 g/ml) exhibited marked levels of toxicity. C. ochroleuca (Sunnhemp) contained all the five classes of phytochemicals, but proved less toxic (LC50 4511.3 g/ml). This vegetable is highly utilized in Nyang’oma, and seventy per cent of the respondents consume this species. Though A. hybridus (African spinach, or Amaranth) was found to be the least toxic (LC50 6233.6 g/ml) and this vegetable is recommended for consumption. From the results, five vegetables contain possible agents that can cause acute or chronic toxicities when consumed in large quantities or over a long period of time. Hence some vegetables should be consumed with great care. Further studies are recommended to determine which of the phytochemicals are lethal to mammals, especially human beings.

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