scholarly journals Biochemical Analysis of Phenolics Compounds Accumulated During Developing Stages of Wheatgrass

Author(s):  
Nikita Nimsarkar ◽  
Mayuri Kulkarni ◽  
Dr. Faiyaz Shaikh

The current study was carried out to evaluate the accumulation of phenolic compounds in distinct developmental stages of Wheatgrass (Tritium aestivum). The wheatgrass was grown in the container/tray in the standard condition in the laboratory space provided by the department. Overnight soaked seeds were then sowed in the soil containers for 25 days. The accumulation of phenolics compounds was qualitatively and quantitatively checked in the leaves at 5, 10,15,20,25 days. Phenolics compounds were sequentially extracted in methanol, n-hexane, and acetone. For qualitative analysis, various biochemical tests were carried out and phenolics compounds were quantitatively estimated by Folin-Ciocalteu reagent. Among three solvents methanol extract was found to accumulate phenolics compounds in increasing concentration at various developmental stages i.e. 5th days - 0.7135 mg/ml, 10th days 1.2614 mg/ml, 15th days- 1.1244 mg/ml; 20th days - 1.8093 mg/ml and 25th days - 4.0693 mg/ml. On the qualitative check, methanol extract was found to be positive for tannins, terpenoids, and glycosides. These phenolics could be analyzed for antidiabetic and antimicrobial activities are the future perspective of this study.

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Amel Bendiabdellah ◽  
Mohammed El Amine Dib ◽  
Nawel Meliani ◽  
Alain Muselli ◽  
Djabou Nassim ◽  
...  

The essential oils from the aerial parts ofDaucus crinitusDesf. were analyzed at three developmental stages (early vegetative, early flowering, and full flowering). Oil yield was found to vary depending on the stage of development, and the highest content of oil (0.15% w/w) was obtained at full flowering. The chemical composition of essential oils studied by GC and GC-MS showed a total of 71 compounds: 27 aliphatic compounds, 18 sesquiterpene hydrocarbons, 9 hydrocarbons monoterpene, 5 oxygenated monoterpenes, 5 phenolic compounds, 4 oxygenated sesquiterpenes, 2 oxygenated diterpenes, and 01 diterpene hydrocarbons. Whatever the analyzed stage, phenolic compounds were the most abundant group. Their level significantly increased during ripening and varied from 36.4 to 82.1%. Antimicrobial activities of oils were tested on four different microorganisms. The oils of various phenological stages showed high activity againstCandida albicans(30 mm) andStaphylococcus aureus(11–28 mm) bacteria strains which are deemed very dangerous and very difficult to eliminate. Thus, they represent an inexpensive source of natural antibacterial substances that may potentially be used in pathogenic systems.


2009 ◽  
Vol 1 (2) ◽  
Author(s):  
Risa Nofiani ◽  
Siti Nurbetty ◽  
Ajuk Sapar

<p>The increase of issues on the antibiotics resistant pathogenic bacteria has triggered high exploration for new antimicrobial compounds. One of the potential sources is sponge-associated bacteria. The aim of this study was to get sponge-associated bacteria extract containing antimicrobial activities. On the basis screening of antimicrobial activity using by streaking on agar medium, there were two potential isolates with antimicrobial activities namely LCS1 and LCS2. The two isolates were cultivated,then secondary metabolite product were extracted using methanol as a solvent. Minimum inhibitory concentrations (MICs) of extract LCS 1 were 1,000 μg/well for S. aureus, 950 μg/well for Salmonella sp.and 800 μg/well for Bacillus subtilis. Minimum inhibitory concentrations of extract LCS 2 were 500 μg/well for S. aureus, 1,050 μg/well for Salmonella sp., 750 μg/well for Bacillus subtilis, 350 μg/well for P. aeruginosa, 750 μg/sumur terhadap B. subtilis. Based on the MIC values, the two assay extracts have a relatively low antimicrobial activity.</p> <p>Keywords:Antimicrobial,Sponges associated bacteria,MICs</p>


Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 781
Author(s):  
Jaturong Kumla ◽  
Nakarin Suwannarach ◽  
Keerati Tanruean ◽  
Saisamorn Lumyong

Tropical black bolete, Phlebopus portentosus, provides various nutritional benefits and natural antioxidants to humans. In this study, the chemical composition, phenolic compounds, and antioxidant and antimicrobial activities of fresh mushroom samples and samples stored for a period of one year using different preservation methods (drying, brining, and frozen) were investigated. The results indicated that the brining method significantly reduced the protein and fat contents of the mushrooms. The polyphenol and flavonoid contents of the frozen sample were not significantly different from that of the fresh sample. The results revealed that an inhibition value of 50% (IC50) for the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay of the extract of the dried and frozen samples was not statistically different from that of the fresh sample. The IC50 value of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay and ferric reducing antioxidant power (FRAP) value in the extract of the frozen sample were not found to be significantly different from those of the fresh sample. Furthermore, the lowest degree of antioxidant activity was found in the extract of the brined sample. Additionally, the antimicrobial activities of the extracts of the fresh and frozen samples were not significantly different and both extracts could have inhibited the growth of all tested Gram-positive bacteria and Pseudomonas aeruginosa.


Author(s):  
Elham R. S. Soliman ◽  
Heba El-Sayed

Abstract Background The discovery of potential, new cost-effective drug resources in the form of bioactive compounds from mushrooms is one way to control the resistant pathogens. In the present research, the fruiting bodies of five wild mushrooms were collected from Egypt and identified using internal transcribed spacer region (ITS) of the rRNA encoding gene and their phylogenetic relationships, antimicrobial activities, and biochemical and phenolic compounds were evaluated. Results The sequences revealed identity to Bjerkandera adusta, Cyclocybe cylindracea, Agrocybe aegerita, Chlorophyllum molybdites, and Lentinus squarrosulus in which Cyclocybe cylindracea and Agrocybe aegerita were closely related, while Chlorophyllum molybdites was far distant. Cyclocybe cylindracea and Agrocybe aegerita showed 100% similarity based on the sequenced ITS-rDNA fragment and dissimilar antimicrobial activities and chemical composition were detected. Bjerkandera adusta and Cyclocybe cylindracea showed strong antimicrobial activity against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Micrococcus luteus, Streptococcus pneumoniae, and Candida albicans. This activity could be attributed to the detected phenolic and related compounds’ contents. Conclusion Our finding provides a quick and robust implement for mushroom identification that would facilitate mushroom domestication and characterization for human benefit.


1997 ◽  
Vol 84 (3_suppl) ◽  
pp. 1267-1283 ◽  
Author(s):  
Pascual Marques-Bruna ◽  
Paul N. Grimshaw

7 children 15 to 30 mo. old participated in a study of 3–dimensional kinematics of overarm throwing. Children of different ages were considered to be at different developmental stages of motor development. Video recordings were digitised and 3-dimensional coordinates established using the DLT algorithm. Qualitative analysis indicated that the children executed either a ‘static’ or ‘dynamic’ throwing action. Either could further be classified as ‘arm dominated’ or ‘sequentially linked.’ Maximum elbow extension was no more than 163° for any child; release velocity was higher for older subjects; and the angle of ball release was large in ‘arm-dominated throws’ ( M = 49°) and comparatively smaller in ‘sequentially linked’ throws ( M = 15°).


2021 ◽  
Vol 02 ◽  
Author(s):  
Donia Anvari ◽  
Rashid Jamei

Background: Medicinal and healing plants have been used in treating human diseases for centuries because of their therapeutic effects. They may assist in curing common ailments such as a multitude of skin problems, various disorders from muscle spasms to cuts and wounds. They can be used to relieve symptoms of different illnesses from a cold to some forms of arthritis or some allergies as well. The Asteraceae plant is a strong source of antimicrobial and antioxidant agents and this paper focuses on its specifications. Objectives: This study aimed to investigate the antioxidant potential and radical scavenging of different solvents (Methanol and Ethanol) of five species, i.e., Artemisia absinthium L., Arctium lappa L., Centaurea cyanus L., Silybum marianum L., and Echinops ritro L., belonging to the Asteraceae family. Methods: Methanol and ethanol extracts of the above plants were prepared. The obtained sections were evaluated for total phenolic content (TPC), total flavonoid content (TFC), total antioxidant capacity (TAC), chain-breaking activity (CBA), thiobarbituric acid (TBA), and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. Also, Ferric reducing antioxidant power (FRAP), Nitric oxide (NO) radical scavenging, Hydrogen peroxide (H2O2) radical scavenging, and Superoxide (O2-) radical inhibition assay were measured. Phenolic compounds were determined and measured by high-performance liquid chromatography (HPLC) as well. Results: The collected and analyzed data showed that the highest values for the TPC, TFC, TBA, and DPPH were related to methanol extract of A. lappa L. Moreover, the maximum values for the CBA, H2O2, and O2- were observed in the Ethanol extract of E. ritro L., while methanol extract of E. ritro L. showed the highest amount of FRAP and NO. Eventually, the highest value for TAC was related to A. absintium L., and it was also realized that methanol compared to ethanol solvent was more successful in the extraction procedure. Conclusions: These findings suggest that A. lappa L. and E. ritro L. extracts can be considered excellent natural antioxidant agents. The type of solvent can affect the extraction of phenolic compounds. Sinapic acid, as the highest level of phenolic acid, was found in S. marianum L.


2014 ◽  
Vol 1 (2) ◽  
pp. 94-97
Author(s):  
Saradha M ◽  
Paulsamy S ◽  
Abinaya G

Aim of the study was to analyze the phytochemical constituents and estimation of total flavonoids and phenolic compounds of leaves and roots of the medicinal plant Lagascea mollis. Methanol extract of dried leaves and roots of L. mollis was prepared by using soxhlet apparatus. The extract prepared was tested forpreliminary qualitative phytochemical screening, followed by the quantitative estimation of total flavonoids and phenols by spectroscopy. The selected plant parts were found to contain alkaloids, flavonoids and terpenoids in both parts and saponin is present only in leaf. In quantitative estimation the reports revealedthe presence 0.017 and 0.013 mgRE/g extract and 458.91 and 704.50 mgGAE/g extract total flavonoids and phenolic compounds in leaf and root extract respectively. These major phytoconstituents present in this species may be accounted as factors for the medicinal importance of L. mollis.


2021 ◽  
Vol 12 ◽  
Author(s):  
Yufeng Shi ◽  
Xiaolan Jiang ◽  
Linbo Chen ◽  
Wei-Wei Li ◽  
Sanyan Lai ◽  
...  

Flavonoids, including flavonol derivatives, are the main astringent compounds of tea and are beneficial to human health. Many researches have been conducted to comprehensively identify and characterize the phenolic compounds in the tea plant. However, the biological function of tea flavonoids is not yet understood, especially those accumulated in floral organs. In this study, the metabolic characteristics of phenolic compounds in different developmental stages of flower buds and various parts of the tea flower were investigated by using metabolomic and transcriptomic analyses. Targeted metabolomic analysis revealed varying accumulation patterns of different phenolic polyphenol compounds during flowering; moreover, the content of flavonol compounds gradually increased as the flowers opened. Petals and stamens were the main sites of flavone and flavonol accumulation. Compared with those of fertile flowers, the content of certain flavonols, such as kaempferol derivatives, in anthers of hybrid sterile flowers was significantly low. Transcriptomic analysis revealed different expression patterns of genes in the same gene family in tea flowers. The CsFLSb gene was significantly increased during flowering and was highly expressed in anthers. Compared with fertile flowers, CsFLSb was significantly downregulated in sterile flowers. Further functional verification of the three CsFLS genes indicated that CsFLSb caused an increase in flavonol content in transgenic tobacco flowers and that CsFLSa acted in leaves. Taken together, this study highlighted the metabolic properties of phenolic compounds in tea flowers and determined how the three CsFLS genes have different functions in the vegetative and reproductive organs of tea plants. Furthermore, CsFLSb could regulated flavonol biosynthesis in tea flowers, thus influencing fertility. This research is of great significance for balancing the reproductive growth and vegetative growth of tea plants.


2011 ◽  
Vol 6 (8) ◽  
pp. 1934578X1100600 ◽  
Author(s):  
Mohammad Jamal Saharkhiz ◽  
Kamiar Zomorodian ◽  
Mohammad Reza Rezaei ◽  
Farshid Saadat ◽  
Mohammad Javad Rahimi

The variations in quantity and quality of essential oils (EOs) from the aerial parts of cultivated Satureja hortensis were determined at different stages of harvesting. The EOs of air-dried samples were obtained by hydrodistillation and analyzed by gas chromatography/mass spectrometry (GC/MS). The antimicrobial activity of the EOs was investigated by broth microdilution methods. The amount of EOs (w/w, %) were 2.3, 2.5, 2.0, and 1.8% at floral budding, full flowering, immature fruit, and ripened fruit stages, respectively. γ-Terpinene was the major compound of the EO at all developmental stages, except the ripened fruit stage when it was replaced by carvacrol (46.4%). The EOs exhibited strong antibacterial activities against the tested bacteria. Moreover, the EOs either inhibited or killed the examined yeasts at concentrations ranging from 0.03-8.0 μL/mL. Considering the wide range of antimicrobial activities of the examined EOs, they might have potential to be used in the management of infective agents.


Sign in / Sign up

Export Citation Format

Share Document