Karaman M, Jovin E, Malbasa R, Matavuly M, Popovi? M.
Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Trg D. Obradovica 2, 21000 Novi Sad, Serbia.
The antioxidant activity of organic extracts of eight fungal species, Ganoderma lucidum, Ganoderma applanatum, Meripilus giganteus, Laetiporus sulphureus, Flammulina velutipes, Coriolus versicolor, Pleurotus ostreatus and Panus tigrinus, was evaluated for free radical (DPPH(·) and OH(·)) scavenging capacity and an effect on lipid peroxidation, and the antibacterial activity was tested by the agar well diffusion method. The highest DPPH(·) scavenging activity was found in the methanol extract of G. applanatum (12.5??g/mL, 82.80%) and the chloroform extract of G. lucidum (510.2??g/mL, 69.12%). The same extracts also showed the highest LP inhibition (91.83%, 85.09%) at 500??g/mL, while the methanol extracts of G. applanatum and L. sulphureus showed the highest scavenging effect on OH(·) radicals (68.47%, 57.06%, respectively) at 400??g/mL. A strong antibacterial activity against Gram-positive bacteria was also manifested. The antioxidative potencies correlated generally with the total phenol content (0.19-9.98?mg/g). The HPLC determination showed that the majority of analysed species contained gallic and protocatechic acids. Consequently, these fungi are shown to be potential sources of antioxidative and antibacterial agents. Copyright © 2010 John Wiley & Sons, Ltd.
PMID: 20878697 [PubMed – in process]
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Tripathi MK, Mishra AS, Misra AK, Vaithiyanathan S, Prasad R, Jakhmola RC.
Division of Animal Nutrition, Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, India. email@example.com
AIMS: Selection of white-rot fungi of bio-conversion of mustard straw (MS) into feed for ruminants.
METHODS AND RESULTS: Mustard straw was cultured with Ganoderma applanatum, Coriolus versicolor and Phanerochaete chrysosporium for solid-state fermentation at 35 degrees C from 7 to 63 days for delignification and for 21 days to study dry matter digestibility and protein enrichment. Lignin loss in fungus cultured straw varied between 100 and 470 g kg(-1) lignin. Delignification was higher between 7 and 28 days fermentation with C. versicolor. Among the three fungi P. chrysosporium was the most effective in degrading lignin for longer fermentation. In-vitro dry matter digestibility (IVDMD) and crude protein content was higher in C. versicolor cultured straw. Large quantity of straw was cultured by C. versicolor for 21 days, for in vivo evaluation. Mean pH and metabolites of rumen fermentation were not different while, pH and volatile fatty acid increased at 6 h postfermentation on cultured straw feeding. Cultured straw fermentation increased (P = 0.001) small holotricks and reduced (P = 0.005) large holotricks population. Fungus cultures straw did not improve microbial enzyme concentration.
CONCLUSIONS: Coriolus versicolor and P. chrysosporium were the promising fungus for MS bio-delignification.
SIGNIFICANCE AND IMPACT OF THE STUDY: Coriolus versicolor treated MS improved dry matter digestibility and protein content.
PMID: 18266643 [PubMed – indexed for MEDLINE]
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