scholarly journals Plant- and Seaweed-Based Extracts Increase Yield but Differentially Modulate Nutritional Quality of Greenhouse Spinach through Biostimulant Action

Agronomy ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 126 ◽  
Author(s):  
Youssef Rouphael ◽  
Maria Giordano ◽  
Mariateresa Cardarelli ◽  
Eugenio Cozzolino ◽  
Mauro Mori ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Nutritional Quality ◽  
Foliar Application ◽  
Protein Hydrolysate ◽  
Chlorophyll Biosynthesis ◽  
Crop Productivity ◽  
Growth Cycle ◽  
High Yield ◽  
Nitrate Accumulation

Plant biostimulants (PBs) such as protein hydrolysates and seaweed extracts are attracting the increasing interest of scientists and vegetable growers for their potential toenhance yield and nutritional quality. The current study assessed crop productivity, leaf colorimetry, mineral profile and bioactive compounds of greenhouse spinach in response to the foliar application of three PBs: legume-derived protein hydrolysate [PH], extract of seaweed Ecklonia maxima or mixture of vegetal oils, herbal and seaweed Ascophyllum nodosum extracts. Plants were PB-treated at a rate of 3 mL L−1 four times during their growth cycle at weekly intervals. Foliar PB applications enhanced fresh yield, dry biomass and leaf area of spinach in comparison with untreated plants. Improved yield performance with PB applications was associated with improved chlorophyll biosynthesis (higher SPAD index). The three PB treatments elicited an increase in bioactive compounds (total phenols and ascorbic acid), thus raised the functional quality of spinach. The application of PH enhanced K and Mg concentrations and did not result in increased nitrate accumulation as observed with the other two PB treatments. Our findings can assist vegetable farmers and the agro-food industry in adopting innovative and sustainable tools such as PB for complementing a high yield with premium quality.

Comparative assessment of bioactive compounds, antioxidant capacity and nutritional quality of red seaweeds and water spinach

2021 ◽  
pp. 101878
Author(s):  
Md. Solaiman Hossain ◽  
Saad Al-din Sifat ◽  
M. Afzal Hossain ◽  
Sazlina Salleh ◽  
Mofazzal Hossain ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Nutritional Quality ◽  
Comparative Assessment ◽  
Water Spinach ◽  
Red Seaweeds

Foliar Application with Iron Oxide Nanomaterials Stimulate Nitrogen Fixation, Yield, and Nutritional Quality of Soybean

ACS Nano ◽  
2022 ◽  
Author(s):  
Xuesong Cao ◽  
Le Yue ◽  
Chuanxi Wang ◽  
Xing Luo ◽  
Chenchi Zhang ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Iron Oxide ◽  
Nutritional Quality ◽  
Foliar Application

scholarly journals Effect of Reduced Nitrogen and Supplemented Amino Acids Nutrient Solution on the Nutritional Quality of Baby Green and Red Lettuce Grown in a Floating System

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 922 ◽  
Author(s):  
Pavlos Tsouvaltzis ◽  
Dimitrios S. Kasampalis ◽  
Danai-Christina Aktsoglou ◽  
Nikolaos Barbayiannis ◽  
Anastasios S. Siomos
Keyword(s):  
Amino Acids ◽  
Nutrient Solution ◽  
Nutritional Quality ◽  
Mineral Nitrogen ◽  
Leafy Vegetables ◽  
Nitrate Accumulation ◽  
Nitrogen Reduction ◽  
Soluble Solid ◽  
Floating System

Excessive nitrogen fertilization results in nitrate accumulation in leafy vegetables. Reducing the dose of mineral nitrogen or using alternate fertilizers lowers the nitrate accumulation; however, a critical minimum level of mineral nitrogen is necessary to maintain yield and nutritional quality. The aim of this study was to evaluate the effect of two levels of mineral nitrogen (100% and 50%) and three levels of an amino acid solution (0, 0.3, and 0.9%) in the nutrient solution of two baby lettuce cultivars (green and red) grown in a floating system. Nitrogen reduction did not affect yield (12.9–13.4 and 11.0–11.3 g/plant, respectively) but reduced nitrate accumulation (by 43 and 19%, respectively) in both green and red lettuce, while enhancing phenolic content (by 28%) and antioxidant capacity (by 69%) in green lettuce and soluble solid (by 7%) and total chlorophyll content (by 9%) in red lettuce. Although nitrate accumulation was prevented (< 355 mg/kg FW) and most nutritional components increased in both lettuce types by amino acids supplementation, plant growth was negatively affected, especially in red lettuce, in both concentrations of amino acids (reduction by 9 and 35% in 0.3 and 0.9%, respectively). In both lettuce types, proline content increased by 0.9% amino acids supplementation (by 45%), implying a probable induction of a stress condition. Mineral nutrients were slightly affected by nitrogen reduction, which was probably perceived as an abiotic stress.

scholarly journals Effects of Biostimulants on Annurca Fruit Quality and Potential Nutraceutical Compounds at Harvest and during Storage

Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 775 ◽  
Author(s):  
Giulia Graziani ◽  
Alberto Ritieni ◽  
Aurora Cirillo ◽  
Danilo Cice ◽  
Claudio Di Vaio
Keyword(s):  
Antioxidant Capacity ◽  
Cold Storage ◽  
Foliar Application ◽  
Protein Hydrolysate ◽  
Quality Parameters ◽  
Soluble Solids ◽  
Nutraceutical Compounds ◽  
Organoleptic Characteristics

The cultivar Annurca is an apple that is cultivated in southern Italy that undergoes a typical redding treatment and it is appreciated for organoleptic characteristics, high pulp firmness, and nutritional profile. In this study, the effects of three different biostimulants (Micro-algae (MA), Protein hydrolysate (PEP), and Macro-algae mixed with zinc and potassium (LG)), with foliar application, on the quality parameters of Annurca apple fruits at the harvest, after redding, and at +60 and +120 days of cold storage were analyzed: total soluble solids (TSS) content, total acidity (TA), pH, firmness flesh, and red coloration of epicarp. Additionally, the polyphenolic quali-quantitative profile of pulp and peel was analyzed by UHPLC-Q-Orbitrap HRMS and Folin-Ciocalteu and the antioxidant capacity with the methods 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferric-reducing antioxidant capacity (FRAP). The results obtained suggest that biostimulants are involved in the regulation of the secondary metabolism of the treated plants, acting positively on the quality of the Annurca fruits and their nutritional value. Fruits treated with PEP have shown, during cold storage, a significantly higher content of total polyphenols in flesh and a higher concentration of phloretin xylo-glucoside and phloridzin (350.53 and 43.58 mg/kg dw respectively). MA treatment caused, at the same time, an enhancement of flavonols between 0.6–28% and showed the highest total polyphenol content in the peel after 60 and 120 days of cold storage, with 2696.048 and 2570.457 mg/kg dw, respectively. The long-term cold storage (120 days) satisfactorily maintained phenolic content of fruits deriving from MA and PEP application, in accordance with data that were obtained for peel, showed an increase of 7.8 and 5.8%, respectively, when compared to the fruits cold stored for 60 days. This study represents the first detailed research on the use of different types of biostimulants on the quality of the Annurca apple from harvest to storage.

scholarly journals Changes in Bioactive Compounds, Antioxidant Activity, and Nutritional Quality of Blood Orange Cultivars at Different Storage Temperatures

Antioxidants ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1016
Author(s):  
Fariborz Habibi ◽  
Asghar Ramezanian ◽  
Fabián Guillén ◽  
Salvador Castillo ◽  
María Serrano ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Bioactive Compounds ◽  
Nutritional Quality ◽  
Prolonged Storage ◽  
Storage Duration ◽  
Total Anthocyanins ◽  
Phenolics Content ◽  
Storage Temperatures ◽  
Blood Orange

Information about the postharvest physiological behavior of blood orange cultivars can provide comprehensive insight into the best period of storage to maintain the highest fruit quality during prolonged cold storage. In this paper, changes in nutritional quality, bioactive compounds, and antioxidant enzymes in the juice of four blood orange cultivars (“Moro”, “Tarocco”, “Sanguinello”, and “Sanguine”) stored at 2 and 5 °C were studied. Parameters were measured after 0, 30, 60, 90, 120, 150, and 180 days, plus 2 days at 20 °C for shelf life. Sucrose was the sugar found in higher concentrations and decreased during storage in all cultivars, as did glucose and fructose. Organic acids decreased at both temperatures, with the highest content found in “Sanguinello”, especially major (citric acid) and ascorbic acid. Total phenolics content (TPC), total anthocyanins (TAC), and individual cyanidin 3-glucoside and cyanidin 3-(6″-malonylglucoside) increased for all cultivars, with “Sanguinello” having higher concentrations. The antioxidant enzymes catalase (CAT), ascorbate peroxidase (APX), and superoxide dismutase (SOD) were also higher in “Sanguinello” and increased during storage. Overall, these results together with the sensory analysis suggested that “Sanguinello” would be the best cultivar for prolonged storage. The results of this study could be useful to select the best storage duration and temperature for each cultivar and provide the presence of such a high-value commodity for fresh consumption or juice processing long after the harvest season.

ALGAS MARINAS COMO FUENTE DE COMPUESTOS BIOACTIVOS EN BENEFICIO DE LA SALUD HUMANA: UN ARTÍCULO DE REVISIÓN/ SEAWEEDS AS SOURCES OF BIOACTIVE COMPOUNDS IN THE BENEFIT OF HUMAN HEALTH: A REVIEW

Biotecnia ◽  
2016 ◽  
Vol 18 (3) ◽  
pp. 20-27
Author(s):  
Richard Gutiérrez Cuesta ◽  
Kethia L. González García ◽  
Olga del R. Valdés Iglesias ◽  
Yasnay Hernández Rivera, ◽  
Yulexi Acosta Suárez
Keyword(s):  
Bioactive Compounds ◽  
Nutritional Quality ◽  
Functional Food ◽  
Food Source ◽  
Protein Structures ◽  
Nutritional Supplements ◽  
Asian Countries ◽  
High Quality ◽  
Ancient Times

Las algas han sido utilizadas desde tiempos remotos como alimento principalmente por países asiáticos. Son usadas en la actualidad en muchos otros países como fertilizantes, biocombustibles, fuentes de hidrocoloides entre otras aplicaciones. Su alto contenido de proteínas, lípidos poliinsaturados, fibra dietética, vitaminas y minerales las hacen una fuente atractiva de alimentos funcionales. También poseen sustancias con valor nutracéutico, como los compuestos fenólicos y las clorofilas. En Cuba se evidencia la existencia de ellas en la plataforma insular incluidas las zonas costeras y las bahías. Sin embargo, hasta el presente no existen suplementos nutricionales ni productos farmacéuticos en el mercado nacional elaborados a partir de las macroalgas. La calidad nutritiva de algas marinas junto al alto contenido de compuestos bioactivos con propiedades beneficiosas para la salud, constituyen dos razones importantes para fundamentar su consumo. Además, las algas poseen en su composición, polisacáridos que permiten su incorporación en alimentos cárnicos y en pastas, manteniendo o mejorando su calidad sensorial, nutritiva y saludable. ABSTRACTSince ancient times, algae have been used as a food source fundamentally by Asian countries. They are employed in our times as fertilizer, biogas, in hydrocolloids’ industry and others. Its composition in high quality proteins, polyunsatured lipids, dietary fiber, vitamins and minerals are determinants to declare algae as an attractive functional food. Furthermore, algae have nutraceutical substances, including phenols and chlorophylls. In Cuba, they are present in all Cuban seashore and harbors. However, no macroalgae’s nutritional supplements or pharmaceutic products in the Cuban market exist. The nutritional quality of seaweed alongside the high content of bioactive compounds with beneficial health properties, constitute two important reasons to increase consumption. Moreover, algae have in their composition protein structures that allows its incorporation into of meat and pasta foods, maintaining or improving their sensory, nutritious and healthy quality.

scholarly journals The Effect of Cultivar and Biostimulant Treatment on the Carrot Yield and its Quality

2012 ◽  
Vol 77 (1) ◽  
pp. 37-48 ◽  
Author(s):  
Aneta Grabowska ◽  
Edward Kunicki ◽  
Agnieszka Sękara ◽  
Andrzej Kalisz ◽  
Renata Wojciechowska
Keyword(s):  
Chemical Composition ◽  
Nutritional Quality ◽  
Dry Matter ◽  
Foliar Application ◽  
Soluble Sugar ◽  
Soluble Sugars ◽  
Matter Content ◽  
Cultivated Plants ◽  
Dry Matter Content

Summary Modifications in growing techniques can affect the yield and nutritional quality of various cultivated plants. Among them, the use of biostimulants is environmental friendly method of stimulating crop productivity, stress resistance, and affecting yield or chemical composition of the plants. The aim of the investigation was determining of the effect of biostimulant treatment on yield and its quality of carrot grown for summer harvest. The experiment was carried out in 2009-2011 in the experimental station of the University of Agriculture in Krakow, south Poland. Two experimental factors were taken into consideration: (1) cultivar: Nandrin F1 and Napoli F1 (2) dose of Aminoplant (foliar application): 1.5 and 3.0 dm3∙ha-1 and control (without Aminoplant). Total and marketable yield, root length, its diameter, leaf mass and leaf : root mass ratio were assessed. The dry matter, soluble sugar, carotenoids and nitrate ions contents were analyzed as main determinants of carrot nutritional quality. Aminoplant influenced not only carrot productivity, but mainly chemical composition of the roots. The present results also suggest that carrot reaction to biostimulant treatment was depended on a cultivar more than on environmental conditions in particular growing seasons. The significant effect of Aminoplant in a dose of 1.5 dm3∙ha-1 on the yield of roots and leaf rosette mass of ‘Nandrin F1’ appeared only in the first year of the experiment. Spraying with Aminoplant in a dose of 3.0 dm3∙ha-1 significantly increased the soluble sugars content in carrot roots of both cultivars but only in 2011. Dry matter content was also affected by biostimulant treatment mainly for ‘Napoli F1’, which showed the lowest dry matter content when sprayed with Aminoplant in a dose of 1.5 dm3∙ha-1. In 2010 control plants contained the greater amount of carotenoids, while in next year roots of plants treated with Aminoplant in a dose of 3.0 dm3∙ha-1 had more these compounds. The significant effect of Aminoplant on nitrates content in carrot roots was observed but were not repeatable in the experimental years, so different climatic conditions modified carrot reaction on biostimulant spraying.

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