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Bioactive Compounds in Extracts from the Agro-Industrial Waste of Mango
Mango by-products are important sources of bioactive compounds generated by agro-industrial process. During mango processing, 35–60% of the fruit is discarded, in many cases without treatment, generating environmental problems and economic losses. These wastes are constituted by peels and seeds (tegument and kernel). The aim of this review was to describe the extraction, identification, and quantification of bioactive compounds, as well as their potential applications, published in the last ten years. The main bioactive compounds in mango by-products are polyphenols and carotenoids, among others. Polyphenols are known for their high antioxidant and antimicrobial activities. Carotenoids show provitamin A and antioxidant activity. Among the mango by-products, the kernel has been studied more than tegument and peels because of the proportion and composition. The kernel represents 45–85% of the seed. The main bioactive components reported for the kernel are gallic, caffeic, cinnamic, tannic, and chlorogenic acids; methyl and ethyl gallates; mangiferin, rutin, hesperidin, and gallotannins; and penta-O-galloyl-glucoside and rhamnetin-3-[6-2-butenoil-hexoside]. Meanwhile, gallic acid, ferulic acid, and catechin are reported for mango peel. Although most of the reports are at the laboratory level, they include potential applications in the fields of food, active packaging, oil and fat, and pharmaceutics. At the market level, two trends will stimulate the industrial production of bioactive compounds from mango by-products: the increasing demand for industrialized fruit products (that will increase the by-products) and the increase in the consumption of bioactive ingredients.
Journal Article
The Bioaccessibility and Antioxidant Activities of Fermented Mango Cultivar Juices after Simulated In Vitro Digestion
The purpose of this study was to investigate the bioaccessibilities of total phenolic compounds, carotenoid profile, antioxidant activity, and Lactic acid bacteria (LAB) survival in fermented mango juice (MJs) obtained from three mango cultivars after exposure to an in vitro gastrointestinal digestion model. The MJs from three cultivars (‘Sabre’, ‘Peach’, and ‘Tommy Atkins’) were fermented using Lactiplantibacillus plantarum 75 (L75), Leuconostoc pseudomesenteroides 56 (L56), and their combination (L56 + 75). Fermented MJs were digested and fractions: gastric (GF), intestinal (IF), and dialysis (DF) were analyzed for total polyphenolic content (TPC), antioxidant activity (FRAP), 1-diphenyl-2-picrylhydrazyl (DPPH), and 2.2-azinobis-3-ethyl-benzothiazoline–6-sulfonic acid (ABTS). In addition, the carotenoid content and the LAB population were determined from the GF and IF. After digestion, TPC decreased while fermentation improved its bioaccessibility. L75-fermented ‘Sabre’ MJs had the highest bioaccessible TPC in the GF (75.65%), IF (50.10%), and DF (32.52%) while L56 ‘Peach’ MJs increased the β-carotene bioaccessibility by 1.32-fold at GF and IF (1.21-fold). When compared to the other two juices, ‘Sabre’ and ‘Peach’ MJs fermented with L75 showed the highest IC50 values for DPPH and ABTS. Generally, L75-fermented ‘Sabre’ MJs had the highest LAB survival at both GF (7.57 Log CFU/mL) and IF (7.45 Log CFU/mL) and hold potential as probiotic juices. L56-fermented ‘Sabre’ MJs would ensure the delivery of four times the carotenoid recommended dietary allowance (RDA) to a target site in the body while L75-fermented ‘Peach’ MJs could be used to effectively counteract oxidants in the body system.
Journal Article
Factors Driving Consumption Preferences for Fresh Mango and Mango-Based Products in Italy and Brazil
In many European countries the consumption of tropical fruit is constantly growing, and people are increasingly turning to diets rich in fruit and vegetables. In this context, mango is considered a super-food for its nutritional medium-high energy value. Produced mainly in developing countries, tropical fruits animate an interesting international market. Production in Mediterranean countries is also growing and is increasingly requested in European markets. The aim of this work is to investigate the factors that drive the inclination to purchase fresh mango and mango food and drinks in Italy and Brazil in order to observe consumer preferences in the two countries. The personal experiences, motivations and choices of consumers regarding fresh mango and mango-based products were taken into consideration. Through an online survey, a semi-structured questionnaire was administered in Italy and Brazil which led to a total sample of 453 participants. The data were statistically analyzed, and a PLS-SEM model was used to empirically examine the factors influencing the consumption of fresh mango and mango food and drinks. The research hypotheses are all supported. For a comparison between the two countries, a multigroup analysis (PLS-MGA) was performed. In Italy, consumers are attentive to the quality and safety of the fruit; they choose the point of sale where they buy fresh mango or mango foods because they trust the seller to guarantee the fruit’s origin and transformation. In Brazil, new consumer trends are emerging especially in gastronomy; since they are local foods, they are considered safe, sustainable and healthy by consumers. The study addresses a little-explored topic and aims to enrich the debate on consumer orientations, preferences and reasons for buying mango and mango products.
Journal Article
Assessment of bioactive compounds and antioxidant capacity of peels and seeds from Mangifera indica L cv Ataulfo waste
In Mexico, mango processing waste constitutes approximately 600,000 tons per year. This work aims to evaluate peels and seeds’ bioactive compounds and antioxidant activity (AA) from Mangifera indica L cv Ataulfo waste. Mango peel flour (MPF) and mango seed flour (MSF) were obtained. Mango seed oil (MSO) was obtained from MSF, then physicochemically evaluated, and the fatty acid composition was determined by methyl esters formation (FAME) and gas chromatography. The total phenolic content (TPC), carotenoids, chlorophyll a, b, and total, and vitamin C from the MSF and MSO extracts were quantified. The AA was analyzed by DPPH and ABTS. The MSO showed similar physicochemical characteristics and fatty acid composition to cocoa butter and shea butter. Stearic (C18:0), oleic (C18:1), and linoleic (C18:2) fatty acids constituted the majority of the total fatty acids, and the ratio of stearic: oleic acids was 0.82. The MPF had 186.11 ± 0.94 mg GAE/g of TPC, 164.67 ± 1.56, 292.88 ± 1.38, and 457.55 ± 0.93 mg/kg of chlorophylls a, b, and total, respectively, and the carotenoid content in MSO was 120.76 ± 1.98 mg β-carotene/kg. All bioactive compounds influenced the AA.
Journal Article
Rootstock-mediated carbohydrate metabolism, nutrient contents, and physiological modifications in regular and alternate mango
Most of the popular scion varieties of mango possess alternate/irregular bearing. There are many external and internal factors assigned, among them carbohydrate reserves, and nutrient content plays important roles in the floral induction process in many crop species. In addition to that rootstock can alter the carbohydrate reserve and nutrient acquisition of scion varieties in fruit crops. The present investigation was carried out to understand the effect of rootstocks on the physiochemical traits of leaf, and bud and nutrient content in regular and alternate bearing varieties of mango. The rootstock \"Kurukkan\" promoted starch content in leaves of both alternate bearing varieties 'Dashehari' (5.62 mg/g) and regular 'Amrapali' (5.49 mg/g) and encouraged higher protein content (6.71 mg/g) and C/N ratio (37.94) in buds of alternate bearing 'Dashehari'. While Olour rootstock upregulated the reducing sugar in leaves of 'Amrapali' (43.56 mg/g) and promoted K (1.34%) and B (78.58 ppm) content in reproductive buds of 'Dashehari'. Stomatal density in 'Dashehari' scion variety was found higher on Olour rootstock (700.40/mm 2), while the rootstock fails to modify stomatal density in the scion variety regular bearer 'Amrapali'. Further, a total of 30 carbohydrate metabolism-specific primers were designed and validated in 15 scion/rootstock combinations. A total of 33 alleles were amplified among carbohydrate metabolism-specific markers, which varied from 2 to 3 alleles with a mean of 2.53 per locus. Maximum and minimum PIC value was found for NMSPS10, and NMTPS9 primers (0.58). Cluster analysis revealed that scion grafted on Kurukkan rootstock clustered together except 'Pusa Arunima' on Olour rootstock. Our analysis revealed that Fe is the key component that is commonly expressed in both leaf and bud. Although Stomatal density (SD) and Intercellular CO.sub.2 Concentration (Ci) are more specific to leaf and Fe, B, and total sugar (TS) are abundant in buds. Based on the results it can be inferred that the physiochemical and nutrient responses of mango scion varieties are manipulated by the rootstock, hence, the scion-rootstock combination can be an important consideration in mango for selecting suitable rootstock for alternate/irregular bearer varieties.
Journal Article
In Vitro and Ex Vivo Evaluation of IMangifera indica/I L. Extract-Loaded Green Nanoparticles in Topical Emulsion against Oxidative Stress and Aging
Although Mangifera indica L. extract (M-Ext) of the peel and kernel possesses potent antioxidant and excellent antiaging qualities, the effects are only partially seen because of the skin’s limited ability to absorb it. M-Ext was loaded into nanolipid carriers (M-NLCs) in this work to create a green topical formulation that would boost antiaging efficacy and address penetration deficit. Compound identification was done using GCMS and atomic absorption spectroscopy for heavy metals in M-Ext. M-Ext was also evaluated against oxidative stress antioxidant enzymes. The M-NLCs were fabricated and evaluated for their physicochemical characterizations. Cytotoxicity and cell permeation analysis of M-Ext and M-NLCs were carried out in fibroblasts and HaCaT cell lines. An ex vivo permeation study of M-Ext and M-NLC-loaded emulsion was performed through rat skin and the kinetic parameters were determined. Kinetic data showed that the ex vivo permeation of M-NLC-loaded emulsion through rat skin followed the Higuchi model. The safety profile was evaluated in human volunteers after written consent. Three months’ in vivo investigations were conducted using the optimized M-NLC-loaded emulsion and vehicle (B-NLC-loaded emulsion) on human cheeks for comparison. The volunteers’ skin erythema level, melanin contents, TEWL index, moisture contents, sebum level, elasticity, pH, and pore size were examined after the first, second, and third month via noninvasive techniques. There were significant findings for physicochemical characterizations and in vitro and ex vivo studies. The findings demonstrate that the green nanolipid carriers amplified the overall antioxidant effectiveness and may represent an emerging treatment strategy for oxidative stresses and aging.
Journal Article
Research Progress on Mango Post-Harvest Ripening Physiology and the Regulatory Technologies
Mango (Mangifera indica L.) is an important tropical fruit with a delicate taste, pleasant aroma, and high nutritional value. In recent years, with the promotion of the rural revitalization strategy and the development of the poverty alleviation industry, China has gradually become an important mango producer. However, the short shelf life of mango fruit, the difficulty in regulating the postharvest quality, and the lack of preservation technology are the main problems that need to be solved in China‘s mango industry. In this paper, the physiological changes and mechanisms of mango during postharvest ripening were summarized, including sugar and acid changes, pigment synthesis and accumulation, and aroma formation and accumulation. The physical, chemical, and biological technologies (such as endogenous phytohormones, temperature, light, chemical preservatives, and edible coatings) commonly used in the regulation of mango postharvest ripening and their action principles were emphatically expounded. The shortcomings of the existing mango postharvest ripening regulation technology and physiological mechanism research were analyzed in order to provide a reference for the industrial application and development of mango postharvest.
Journal Article
Heavy Metal Content Test on Ethanol Extract of Mango Mistletoe Leaf (Dendrophthoe pentandra (L.) Miq) Using the AAS Method
Living organisms require specific levels of heavy metals. However, excessive exposure to heavy metals, which accumulate in plants over time, can damage cells and organs. Due to these harmful effects, heavy metal toxicity has become a significant concern. In this context, as part of the development of mango mistletoe leaf herbal products, this study aims to measure the concentrations of Pb, Cu, Fe, Zn, and Cr in mango mistletoe leaf extracts using Atomic Absorption Spectroscopy (AAS). This technique detects heavy metals based on their unique absorption of electromagnetic radiation at specific wavelengths. To conduct this analysis, samples were prepared by wet destruction with HNO 3 and HCl (1:3), followed by digestion at 150°C to isolate the atoms. The results showed average concentrations of Pb (0.615 ± 0.045 mg/kg), Cu (0.168 ± 0.007 mg/kg), Fe (0.492 ± 0.063 mg/kg), Zn (0.243 ± 0.010 mg/kg), and Cr (0.156 ± 0.011 mg/kg). Notably, the highest average was for Pb (0.615 ± 0.045 mg/kg), followed by Fe (0.492 ± 0.063 mg/kg) and then Zn (0.243 ± 0.010 mg/kg). In conclusion, the herbal tea made from mistletoe leaves remains within the safety limits set by the Food and Drug Supervisory Agency.
Journal Article