@article {1603, title = {Evaluating the Antioxidant and Heavy Metal Content of Pleurotus ostreatus Mushrooms Cultivated using Sugar Cane Agro-Waste}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {July 2021}, pages = {844-852}, type = {Original Article}, chapter = {844}, abstract = {

Background: Pleurotus ostreatus, is one of the most cultivated mushrooms with great economic and medicinal value that can be easily grown on various bio-waste substrates. However, biosafety evaluations on these mushrooms are rarely conducted. Thus, we sought to evaluate the concentration or presence of Heavy metals in P. ostreatus mushrooms cultivated on agro-bio-waste products. Furthermore, the effect of adding agro wastes on wheat bran (WB) cultivated mushrooms was evaluated. Methods: Mushrooms grown in sugar cane tops and bagasse were supplemented with varying levels of WB. Atomic absorption spectrophotometer was applied to evaluate the concentration of heavy metals in the substrates and within mushrooms. Furthermore, DPPH free radical scavenging activity was used to determine antioxidant activity of mushroom extracts. Results: The transfer factor analysis (TF) showed that mushrooms have an affinity to absorb Zn, Cd, Cu and Cr from all tested substrates during cultivation (TF\>1). The addition of WB supplement into substrates resulted into significant increase in mushroom yield. However, the increased addition of WB, inversely affected the DPPH scavenging activity of the P.ostreatus methanolic extracts. Conclusion: The bioabsorption of heavy metals by P. ostreatus is depended on the metal type. Based on these findings, mushrooms grown on these agro-waste appear to be safe and potent scavenging ability against free radicals.

}, keywords = {Antioxidant, DPPH, Heavy metals, Mushrooms, Pleurotus ostreatus}, doi = {10.5530/pj.2021.13.108}, author = {Senzosenkosi Surprise Mkhize and Mthokozisi Blessing Cedric Simelane and Nothando Lovedale Gasa and Ofentse Jacob Pooe} } @article {480, title = {Anti-Staphylococcal and Antioxidant Properties of Crude Ethanolic Extracts of Macrofungi Collected from the Philippines}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {November 2017}, pages = {106-109}, type = {Original Article}, chapter = {106}, abstract = {

Introduction: Macrofungi have been used in the Philippines as source of food and traditional medicines. However, these macrofungi in the Philippines have not yet been studied for different biological activities. Thus, this research determined the potential antibacterial and antioxidant activities of crude ethanolic extracts of seven macrofungi collected in Bataan, Philippines. Methods: Kirby-Bauer disk diffusion assay and broth microdilution method were used to screen for the antibacterial activity and DPPH scavenging assay for the determination of antioxidant activity. Results: F. rosea, G. applanatum, G. lucidum and P. pinisitus exhibited zones of inhibition ranging from 6.55 \± 0.23 mm to 7.43 \± 0.29 mm against S. aureus, D. confragosa, F. rosea, G. lucidum, M. xanthopus and P. pinisitus showed antimicrobial activities against S. aureus with an MIC50 ranging from 1250 \μg/mL to 10000 \μg/mL. F. rosea, G. applanatum, G. lucidum, M. xanthopus exhibited excellent antioxidant activity with F. rosea having the highest antioxidant activity among all the extracts tested (3.0 \μg/mL). Conclusion: Based on the results, these Philippine macrofungi showed antistaphylococcal activity independent of the antioxidant activity. These can be further studied as potential sources of antibacterial and antioxidant compounds.

}, keywords = {Antimicrobial, Antioxidant, Mushrooms, Philippines, Staphylococcus aureus}, doi = {10.5530/pj.2018.1.19}, url = {http://fulltxt.org/article/405}, author = {Christine May Gaylan and John Carlo Estebal and Ourlad Alzeus G. Tantengco and Elena M. Ragragio} } @article {439, title = {Phytochemical, Free Radical Scavenging Activity and Thin Layer Chromatography Analysis of Methanolic Extracts of Six Wild Mushroom Species Collected From the Shai Hills Reserve of Ghana}, journal = {Pharmacognosy Journal}, volume = {9}, year = {2017}, month = {November 2017}, pages = {s16-s22}, type = {Original Article}, chapter = {s16}, abstract = {

Objective: Six different mushroom species (Termitomyces, Ganoderma, Amauroderma, Mycena, Marasmus and an unknown) were studied to ascertain their phytochemical and antioxidant properties and determine their TLC analysis of methanolic extracts. Materials and Methods:\ The DPPH (1,1-diphenyl-2-picrylhydrazyl) model was employed to determine free radical scavenging activity of the methanolic extracts of the mushrooms, aluminum chloride calorimetric method for flavonoid, Thin layer chromatography (TLC) for retention factor and atomic absorption spectrophotometric (AAS) for macro and micronutrients. Results:\ Phytochemical analyses of the methanolic extract revealed the presence of antioxidants, phenols and flavonoids. The antioxidant values (IC50 (g/ml)) ranged from 1.56 x 10-4 to 21.07 x10-4.Total phenol content ranged between 2.54 and 17.53 mg/g GAE with a mean of about 11.27 mg/g GAE. Total flavonoid content also ranged from 5.46 to 23.75 mg/g RUE with a mean of 13.41 mg/g RUE. Micronutrients such as cadmium, iron, lead, manganese and zinc were determined. Also macronutrients determined included, calcium, potassium, magnesium and sodium. Sodium ranged the highest with values ranging 6966.67 mg/L to 9600.00 mg/L followed by iron ranging from 1613.67 to 3040.00 mg/L. Percentage crude protein ranged between 11.09 \% and 28.24 \%. Alkaloid was present in only Mycena sp and Ganoderma sp with a band each of Rf value of 0.49. A total of 18 different bands were recorded for flavonoid with Rf values that ranged between 0.20 and 0.97, respectively. Conclusion:\ The antioxidant potential of the methanolic extracts of the mushroom samples in this study recorded higher values. This indicates that mushrooms have high antioxidant properties and rationalizes further investigation in the potential discovery of new natural bioactive principles from these mushrooms.

}, keywords = {Antioxidant, Extracts, Flavonoids, Mushrooms, Phytochemical}, doi = {10.5530/pj.2017.6s.152}, url = {http://fulltxt.org/article/376}, author = {Ebenezer Owusu and Gladys Schwinger and Matilda Dzomeku and Mary Obodai and Isaac Asante} }