scholarly journals Deciphering the Metabolic Pathways of Pitaya Peel after Postharvest Red Light Irradiation

Metabolites ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 108
Author(s):  
Qixian Wu ◽  
Huijun Gao ◽  
Zhengke Zhang ◽  
Taotao Li ◽  
Hongxia Qu ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Enzyme Activities ◽  
Soluble Sugars ◽  
Red Light ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Light Irradiation ◽  
Gas Chromatography Mass Spectrometry ◽  
Postharvest Storage ◽  
Primary Metabolites

Red light irradiation can effectively prolong the shelf-life of many fruit. However, little is known about red light-induced metabolite and enzyme activities. In this study, pitaya fruit was treated with 100 Lux red light for 24 h. Red light irradiation significantly attenuated the variation trend of senescence traits, such as the decrease of total soluble solid (TSS) and TSS/acidity (titratable acidity, TA) ratio, the increase of TA, and respiratory rate. In addition, the reactive oxygen species (ROS) related characters, primary metabolites profiling, and volatile compounds profiling were determined. A total of 71 primary metabolites and 67 volatile compounds were detected and successfully identified by using gas chromatography mass spectrometry (GC-MS). Red light irradiation enhanced glycolysis, tricarboxylic acid (TCA) cycle, aldehydes metabolism, and antioxidant enzymes activities at early stage of postharvest storage, leading to the reduction of H2O2, soluble sugars, organic acids, and C-6 and C-7 aldehydes. At a later stage of postharvest storage, a larger number of resistance-related metabolites and enzyme activities were induced in red light-treated pitaya peel, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical-scavenging, reducing power, fatty acids, and volatile aroma.

scholarly journals Sensory Quality Evaluation of Korla Pear from Different Orchards and Analysis of Their Primary and Volatile Metabolites

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5567
Author(s):  
Yuan Liu ◽  
Simin Xiang ◽  
Haipeng Zhang ◽  
Hongyan Zhang ◽  
Cuiyun Wu ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Tartaric Acid ◽  
Sensory Evaluation ◽  
Sensory Quality ◽  
Fruit Size ◽  
Fruit Shape ◽  
Gas Chromatography Mass Spectrometry ◽  
Pear Fruit ◽  
Primary Metabolites ◽  
Mouth Feel

Metabolites play vital roles in shaping the quality of fresh fruit. In this study, Korla pear fruit harvested from twelve orchards in South Xinjiang, China, were ranked in sensory quality by fuzzy logic sensory evaluation for two consecutive seasons. Then, gas chromatography-mass spectrometry (GC-MS) was applied to determine the primary metabolites and volatile compounds. Sensory evaluation results showed that the panelists were more concerned about ‘mouth feel’ and ‘aroma’ than about ‘fruit size’, ‘fruit shape’ and ‘peel color’. In total, 20 primary metabolites and 100 volatiles were detected in the pear fruit. Hexanal, (E)-2-hexenal, nonanal, d-limonene, (Z)-3-hexen-1-yl acetate and hexyl acetate were identified as the major volatile compounds. Correlation analysis revealed that l-(+)-tartaric acid, hexanoic acid, trans-limonene oxide and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate were negatively correlated with sensory scores. Furthermore, OPLS-DA results indicated that the fruit from three orchards with lower ranks in quality could be distinguished from other samples based on the contents of l-(+)-tartaric acid and other eight metabolites, which were all associated with ‘mouth feel’ and ‘aroma’. This study reveals the metabolites that might be closely associated with the sensory quality attributes of Korla pear, which may provide some clues for promoting the fruit quality in actual production.

scholarly journals Antioxidant and Antimicrobial Properties of the Essential Oil and Extracts ofZanthoxylum alatumGrown in North-Western Himalaya

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Sanjay Guleria ◽  
A. K. Tiku ◽  
Apurva Koul ◽  
Sahil Gupta ◽  
Gurjinder Singh ◽  
...  
Keyword(s):  
Essential Oil ◽  
Methanolic Extract ◽  
Micrococcus Luteus ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Preparative Thin Layer Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Curvularia Lunata

The essential oil obtained from the fresh leaves ofZanthoxylum alatumwas analysed by gas chromatography/mass spectrometry (GC/MS). Fourteen components were identified, and linalool (30.58%), 2-decanone (20.85%),β-fenchol (9.43%), 2-tridecanone (8.86%),β-phellandrene (5.99%), Sabinene (4.82%), andα-pinene (4.11%) were the main components. The EO and methanolic extract ofZ. alatumexhibited potent antifungal activity againstAlternaria alternata,Alternaria brassicae, andCurvularia lunata. The EO also showed significant antibacterial activity againstBacillus subtilis,Micrococcus luteus,Staphylococcus aureus, andEscherichia coli. Further, antimicrobial constituents of the EO were isolated by bioautography and preparative thin layer chromatography (PTLC) and identified asβ-fenchol and linalool using GC/MS analysis. In addition to this, the free radical scavenging activity and antioxidant potential of EO and methanolic extract/fractions ofZ. alatumwere also investigated usingin vitroassays including scavenging ability against DPPH•, reducing power and chelating ability on Fe2+ions. Our results demonstrate thatZ. alatumcould be used as a resource of antioxidant and antimicrobial compounds which may find applications in food and pesticide industries.

scholarly journals Evaluation of Physiological Characteristics, Soluble Sugars, Organic Acids and Volatile Compounds in ‘Orin’ Apples (Malus domestica) at Different Ripening Stages

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 807
Author(s):  
Shunbo Yang ◽  
Zhipeng Meng ◽  
Yanan Li ◽  
Rongxin Chen ◽  
Yazhou Yang ◽  
...  
Keyword(s):  
Organic Acids ◽  
Volatile Compounds ◽  
Solid Phase ◽  
Soluble Sugars ◽  
Titratable Acidity ◽  
Fruit Weight ◽  
Physiological Characteristics ◽  
Gas Chromatography Mass Spectrometry ◽  
Apple Cultivar ◽  
Ripening Stages

‘Orin’ is a popular apple cultivar, which has a yellow-green appearance, pleasant taste, and unique aroma. However, few studies on the fruit quality characteristics of ‘Orin’ apples have been reported before. In this study, changes of the physiological characteristics were measured at different ripening stages, and the soluble sugars and organic acids were determined by high-performance liquid chromatography (HPLC). Volatile compounds were identified using the headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS). During the fruit ripening, the ‘Orin’ apple fruit weight, size, and total soluble solid were gradually increased by contrast with the titratable acidity, and the firmness decreased. The content of four soluble sugars reached the maximum at the 180 days after full bloom (DAFB) stage. Malic acid was measured as the most abundant organic acid in ‘Orin’ apples. Ethyl butyrate, hexyl propanoate, hexyl acetate and butyl acetate belonging to esters with high odor activity values (OAVs) could be responsible for the typical aroma of ‘Orin’ apples. The aim of this work was to provide information on the flavor characteristics of ‘Orin’ apples and promote this apple cultivar for marketing and processing in the future.

scholarly journals Composition and Antioxidant Activities of Volatile Organic Compounds in Radiation-Bred Coreopsis Cultivars

Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 717
Author(s):  
Bo-Ram Kim ◽  
Hyun Mi Kim ◽  
Chang Hyun Jin ◽  
Si-Yong Kang ◽  
Jin-Baek Kim ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Raw Material ◽  
Flowering Plant ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Organic ◽  
Radiation Induced ◽  
Further Development ◽  
Asteraceae Family

Coreopsis is a flowering plant belonging to the Asteraceae family. It is an ornamental plant native to the Americas, Asia and Oceania and its flower is used as a raw material for tea and food manufacture in China. In this study, new cultivars of C. rosea (“golden ring”) were developed via radiation-induced mutation of the original cultivar, “pumpkin pie”. The chemical composition and antioxidant activities of flowers belonging to three different Coreopsis cultivars were evaluated: “golden ring”, “pumpkin pie” and “snow chrysanthemum” (coreopsis tea; C. tinctoria). The volatile compounds were characterized via gas chromatography-mass spectrometry (GC-MS) and 50–59 oils representing 95.3–96.8% of the total volatile compounds in these flower materials were identified. ”Golden ring” contained a high amount of fatty acids (38.13%), while “pumpkin pie” and “snow chrysanthemum” teas were rich in aliphatic amides (43.01%) and esters (67.22%), respectively. The antioxidant activities of the volatile oils of these cultivars were evaluated using 1,1-diphenyl-2-picrylhydraxyl (DPPH) and 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging assays. The volatile extract of “golden ring” showed higher antioxidant activities compared with the extracts of the other cultivars. Therefore, “golden ring” can be used for further development as a raw material for tea manufacture or as a dietary supplement.

scholarly journals Characterization, antioxidant, and cytotoxic effects of some Egyptian wild plant extracts

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Thoria A. Diab ◽  
Thoria K. Donia ◽  
Khalil M. Saad-Allah
Keyword(s):  
Plant Extracts ◽  
Hepg2 Cells ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Wild Plant ◽  
Gas Chromatography Mass Spectrometry ◽  
Total Phenolic ◽  
Dependent Manner ◽  
Antitumor Activities

Abstract Background Natural products from plants are very safe as compared to synthetic ones, so the aim of this study was to assess the in vitro antioxidant and antitumor activities of the ethanolic extracts of four Egyptian wild plant species (Varthemia candicans, Peganum harmala, Suaeda vermiculata, and Conyza dioscoridis), as well as polyphenols and flavonoid contents with gas chromatography–mass spectrometry (GC-MS). The antioxidant activity of the four plant extracts was assessed using 2,2-diphenyl-1-picrylhydrazyl (DPPH) to determine 50% inhibition of DPPH radical scavenging activity and reducing power by phosphomolybdate assay. In addition, the chemical composition of the four sample extracts was investigated using GC-MS. The total phenolic and flavonoid levels were also determined. Then, the antitumor activity of the plant extracts against HepG2 cells was determined using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Results The results showed that Varthemia candicans extract was the highest one regarding both polyphenols and flavonoid contents. Moreover, the extract of Suaeda vermiculata exhibited the lowest half maximum inhibitory concentration (IC50) against DPPH, thus indicating its highest effectiveness. All studied plant extracts decreased the viability of HepG2 cells, in a dose- and time-dependent manner, and the lowest IC50 was for Suaeda vermiculata. Conclusion The investigated plant extracts showed potent antioxidant and antitumor activities in vitro due to their phytochemical contents.

ANTIBACTERIAL, ANTIOXIDANT AND PHYTOCHEMICAL SCREENING OF PALESTINIAN MALLOW, MALVA SYLVESTRIS L.

2020 ◽  
pp. 12-16
Author(s):  
SAHAR DOWEK ◽  
SEEMA FALLAH ◽  
REZQ BASHEER-SALIMIA ◽  
MOHANNAD JAZZAR ◽  
ABDEL QAWASMEH
Keyword(s):  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Secondary Metabolites ◽  
Volatile Compounds ◽  
Radical Scavenging ◽  
Gas Chromatography Mass Spectrometry ◽  
Diffusion Method ◽  
Phytochemical Screening ◽  
Methanolic Extracts ◽  
Wide Range

Objective: To evaluate antibacterial, antioxidant activities, the existence of the major secondary metabolites, and volatile compounds in methanolic extracts from M. sylvestris leaves. Methods: Antibacterial activity was assessed using a well diffusion method. Antioxidant activity was assessed using ABTS●+and DPPH● free radical scavenging assays. Phytochemical screening for secondary metabolites and volatile compounds were done following standard techniques and gas chromatography-mass spectrometry (GC–MS). Results: Methanolic extracts exhibited moderate antibacterial activity compared with the positive control against the gram-negative Klebsiella pneumoniae and the gram-positive bacteria’s Staphylococcus aureus by 47.2 and with 47.1% respectively. The average percentage of scavenging was 97.82±0.05 and 79.49±0.4 for ABTS•+and DPPH●, correspondingly. Total phenols were quantitatively estimated and found to be 78.9±9.55 mg GAE/g. Phytochemical screening assays revealed the presence of a wide range of phytochemical groups such as alkaloids flavonoids, phenols, tannins, quinones, saponins, steroids, tannins, terpenoides with at least sixteen volatile compounds detected in the plant. Conclusion: The present study confirmed the antioxidant activity of the methanolic extract of M. sylvestris and the existence of is the volatile compounds (phytol), which mediate, even partially, the antioxidant and the claimed analgesic activity of the plant.

scholarly journals Chemical Analysis and Antioxidant Activity of the Essential Oils of Three Piperaceae Species Growing in the Central Region of Cuba

2013 ◽  
Vol 8 (9) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Elisa Jorge Rodríguez ◽  
Yanelis Saucedo-Hernández ◽  
Yvan Vander Heyden ◽  
Ernesto F. Simó-Alfonso ◽  
Guillermo Ramis-Ramos ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oils ◽  
Central Region ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Thiobarbituric Acid ◽  
Gas Chromatography Mass Spectrometry ◽  
Radical Scavenging Ability ◽  
Main Components

The present study describes the phytochemical profile and antioxidant activity of the essential oils of three Piperaceae species collected in the central region of Cuba. The essential oils of Piper aduncum, P. auritum and P. umbellatum leaves, obtained by hydrodistillation, were analyzed by gas chromatography-mass spectrometry. The main components of P. aduncum oil were piperitone (34%), camphor (17.1%), camphene (10.9%), 1,8-cineol (8.7%) and viridiflorol (7.4%), whereas that of P. auritum and P. umbellatum was safrole (71.8 and 26.4%, respectively). The antioxidant properties of the essential oils were also evaluated using several assays for radical scavenging ability (DPPH test and reducing power) and inhibition of lipid oxidation (ferric thiocyanate method and evaluation against Cucurbita seed oil by peroxide, thiobarbituric acid and p-anisidine methods). P. auritum showed the strongest antioxidant activity among the Piper species investigated, but lower than those of butylated hydroxyanisol and propyl gallate.

scholarly journals Antioxidant activity and GC-MS profile of Conyza bonariensis L. leaves extract and fractions

2020 ◽  
Vol 73 (3) ◽  
pp. 9305-9313
Author(s):  
Rafael Viteri Espinoza ◽  
Juan Pablo Peñarreta Tivillin ◽  
María Quijano ◽  
Ana Barragán ◽  
Iván Choez ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Ethyl Acetate Fraction ◽  
Syringic Acid ◽  
Gas Chromatography Mass Spectrometry ◽  
Conyza Bonariensis ◽  
Scavenging Capacity ◽  
Trolox Equivalent

The 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing power (FRAP), and semivolatile compounds of Conyza bonariensis L. leave extract and fractions are discussed. A methanolic crude extract was obtained through maceration, and subsequently, n-hexane, chloroform, and ethyl acetate fractions were collected using a solvent-solvent partition. Total phenols, flavonoids, and antioxidant activity assays were performed in an ultraviolet-visible (UV-Vis) spectrophotometer, and the results were expressed as Gallic Acid, Quercetin, and Trolox equivalents respectively. The findings achieved indicate that ethyl acetate fraction showed the highest DPPH radical scavenging capacity (90.69±3.16%) at 500 µg mL-1, and reduced the ferric tripyridyltriazine complex (Fe3+-TPTZ) with values between 19.68 and 2,355.37 mg Trolox equivalent (TE) g-1. It was identified 28 phytoconstituents through Gas chromatography-mass spectrometry (GC-MS). The scavenging activity of ethyl acetate fraction could be correlated mostly to the presence of eugenol, trans-isoeugenol, lucenin-2, methyl salicylate, and syringic acid. This study reveals that the ethyl acetate fraction could be used as a good source of antioxidants for health benefits.

scholarly journals Chemical Compositions and Anti-Skin-Ageing Activities of Origanum vulgare L. Essential Oil from Tropical and Mediterranean Region

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1101 ◽  
Author(s):  
Natnaree Laothaweerungsawat ◽  
Jakkapan Sirithunyalug ◽  
Wantida Chaiyana
Keyword(s):  
Essential Oil ◽  
Mediterranean Region ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Compositions ◽  
Origanum Vulgare ◽  
Antioxidant Power

Origanum vulgare L. has been used as a culinary ingredient worldwide. This study revealed the cosmeceutical potential of O. vulgare essential oil as a skin-ageing retardant. The O. vulgare essential oil from a highland area of a tropical country (HO), obtained by hydrodistillation was investigated and compared to a commercial oil from the Mediterranean region (CO). Their chemical compositions were investigated by gas chromatography–mass spectrometry. Antioxidant activities were investigated by ferric reducing antioxidant power, 1,1-diphenyl-2-picrylhydrazyl, and ferric thiocyanate assay. Anti-skin-ageing activities were determined by means of collagenase, elastase, and hyaluronidase inhibition. Carvacrol was the major component in both oils, but a higher amount was detected in HO (79.5%) than CO (64.6%). HO possessed comparable radical scavenging activity to CO (IC50 = 1.8 ± 0.8 mg/mL) but significantly higher lipid peroxidation inhibition (38.0 ± 0.8%). Carvacrol was remarked as the major compound responsible for the reducing power of both oils. Interestingly, HO possessed significant superior anti-skin-ageing activity than ascorbic acid (P < 0.01), with inhibition against collagenase, elastase, and hyaluronidase of 92.0 ± 9.7%, 53.1 ± 13.3%, and 16.7 ± 0.3%, at the concentration of 67, 25, and 4 µg/mL, respectively. Since HO possessed comparable anti-hyaluronidase activity to CO and superior anti-collagenase and anti-elastase (P < 0.01), HO was suggested to be used as a natural skin-ageing retardant in a cosmetic industry.

scholarly journals GCMS BASED METABOLIC PROFILING OF ESSENTIAL OIL OF CITRUS MACROPTERA MONTRUZ. LEAVES AND PEEL, ASSESSMENT OF IN VITROANTIOXIDANT AND ANTI-INFLAMMATORY ACTIVITY

2017 ◽  
Vol 9 (9) ◽  
pp. 107
Author(s):  
Nongalleima Khumukcham ◽  
T Ajungla ◽  
Chingakham Brajakishore Singh
Keyword(s):  
Essential Oil ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Volatile Oil ◽  
Inflammatory Activity ◽  
Gas Chromatography Mass Spectrometry ◽  
Anti Oxidant ◽  
Anti Inflammatory

Objective: The present investigation was designed for Gas Chromatography Mass Spectrometry (GCMS) based metabolite profiling of Citrus macroptera Montruz. Leaves and peel oils followed by assessment of in vitro antioxidant and anti-inflammatory activity.Methods: Essential oil was extracted from leaves and peels of Citrus macroptera Montruz. The oil samples were subjected to GCMS analysis using Shimadzu GCMS-QP2010 equiped with an AOC-2oi auto-injector and AOC-2os autosampler units. In vitro antioxidant activities were evaluated using DPPH radical scavenging, reducing power and nitric oxide reducing method. In vitro anti-inflammatory activity was evaluated using protease inhibitory assay, heat induced haemolysis and albumin denaturation assay.Results: Both the peels and leaves of Citrus macroptera Montruz. Yielded good amount of essential oil. 57 compounds each were identified from leaves as well as peel of C. macroptera. 10 common compounds have been detected in both the oil samples. Peels oil showed IC50 at 118.07 µg/ml and that of leaves showed IC50 at 252.93 µg/ml in DPPH (1, 1-diphenyl-2-picrylhydrazyl) assay. In reducing assay, peel and leaves oil showed IC50 at 122.5 µg/ml and 208.24 µg/ml. In albumin denaturation, the peels showed IC50 at 73.91 µg/ml and that of leaves showed IC50 at 87.48 µg/ml.Conclusion: The oil yield denotes peel as better source of volatile oil than leaves. Essential oil of peel showed more anti-oxidant and anti-inflammatory activity than that of leaves essential oil.

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