• The Korean Journal of Mycology
• /
• v.19 no.4
• /
• pp.299-305
• /
• 1991

Volatile aroma concentrates of four oyster mushrooms cultivated in Korea were obtained by the simultaneous distillation-extraction method. The volatile components were identified by the combined capillary gas chromatography-mass spectrometry and compared with the of retention data on GC of those authentic compounds. About 54 volatile compounds were identified in each of the four edible oyster mushrooms. The main compounds in Pleurotus ostreatus ASI 201 were 1-octen-3-ol, 3-octanone, 3-octanol, in Pleurotus sajor-caju, 1-octen-3-ol, 3-octanone, 1,5-octadien-3-one, 3-octanol, in Pleurotus florida-ostreatus-ostreatus, 1-octen-3-ol, n-hexanol, 3-octanone, 3-octanol, phenol, and in Pleurotus ostreatus (Ae-Neutari), 1-octen-3-ol, n-pentanal, n-hexanol, n-pentanol, 3-octanone, 3-octanol, 1,5-octadien-3-one, respectively. The mushrooms worked were rich in an alcohols and carbonyl compounds containing $C_8$ compounds. The peak area ratio of $C_8$ compounds in aroma concentrates were 56.60% in Pleurotus ostreatus ASI 201, 72.46% in Pleurotus sajor-caju, 54.84% in Pleurotus florida-ostreatus-ostreatus and 35.85% in Pleurotus ostreatus (Ae-Neutari ), respectively.

• Journal of the East Asian Society of Dietary Life
• /
• v.27 no.1
• /
• pp.69-77
• /
• 2017

This study investigated the quality characteristics and antioxidant activities of Yanggaeng prepared with different ratios of Pleurotus eryngii powder: 0, 3, 6, and 9%. According to the results, the moisture content and pH increased with the addition of Pleurotus eryngii powder, but the Brix decreased. As the amount of Pleurotus eryngii powder increased, the lightness (L) increased, while the redness (a) and yellowness (b) decreased. The hardness of the control groups was lower than the Pleurotus eryngii powder groups. The total polyphenol content was influenced by the addition of Pleurotus eryngii powder. As the amount of Pleurotus eryngii powder increased, DPPH, reducing power, and metal chelating effect increased significantly. The results of a consumer acceptance test showed no significant differences in color between the controls and two groups (3% and 6%), and no significant differences in smell, taste, and overall acceptability between the controls and groups with 3% Pleurotus eryngii powder. Therefore, up to 3% Pleurotus eryngii powder can be incorporated into Yanggaeng to improve the quality and antioxidant potential.

• Mycobiology
• /
• v.49 no.1
• /
• pp.1-14
• /
• 2021

Pleurotus species are commercially essential mushrooms and widely cultivated throughout the world. The production of Pleurotus mushrooms alone accounts for around 25% of that total cultivated mushrooms globally. In America and Europe, Pleurotus species are considered specialty mushrooms, whereas, in Korea, their cultivation is economically profitable, and it is one of the highly consumed species. Pleurotus species are predominantly found in tropical forests and often grow on fallen branches, dead and decaying tree stumps, and wet logs. Biographical studies have shown that the Pleurotus genus is among the more conspicuous fungi that induce wood decay in terrestrial ecosystems worldwide due to its formidable lignin-modifying enzymes, including laccase and versatile peroxidases. Pleurotus species can be grown easily due to their fast colonization nature on diversified agro-substrates and their biological efficiency 100%. Pleurotus mushrooms are rich in proteins, dietary fiber, essential amino acids, carbohydrates, water-soluble vitamins, and minerals. These mushrooms are abundant in functional bioactive molecules, though to influence health. Pleurotus mushrooms are finding unique applications as flavoring, aroma, and excellent preservation quality. Apart from its unique applications, Pleurotus mushrooms have a unique status delicacy with high nutritional and medicinal values. The present review provides an insight into the cultivation of Pleurotus spp. using different agro-waste as growth substances paying attention to their effects on the growth and chemical composition.

• The Korean Journal of Mycology
• /
• v.16 no.2
• /
• pp.87-94
• /
• 1988

Electrophoretic isozyme patterns from mycelia, primordia, cap and stem of Pleurotus spp. collected in Korea were compared. Primordia, cap and stem of fruitbody showed very similar isozyme patterns but mycelial isozyme patterns were different from those of fruitbody. Isozyme patterns of malate dehydrogenase, acid phosphatase in Pleurotus ostreatus collected from different regions in Korea were similar but those of esterase, peroxidase, leucine amino peptidase and superoxide dismutase were different. Interspecific comparison of esterase isozyme patterns among Pleurotus ostreatus P. cornucopiae and, P. florida was very different and may be valuable subsidiary tool to conventional taxonomic techniques for identifying species of Pleurotus. A dendrogram by similarities of isozyme band pattern was presented.

• Mycobiology
• /
• v.31 no.3
• /
• pp.139-144
• /
• 2003

This study was conducted to investigate physiological characteristics of Trichoderma spp. isolated from Pleurotus spp. Damage tests of Pleurotus spp. and mycotoxins tests of Trichoderma spp. were also done. The optimal growth temperature of Trichoderma spp. was $27{\sim}30^{\circ}C$. Although, T. longibrachiatum was able to grow at $37^{\circ}C$ and grew $30{\sim}40$ times faster than Pleurotus. The colony colour on PDA medium of T. cf. virens was yellowish green, T. longibrachiatum was yellow, and T. harzianum was turning to bright green. In damage tests of Pleurotus by Trichoderma, T. cf. virens caused the most severe damage to Pleurotus. T. longibrachiatum and T. harzianum caused less damage on Pleurotus but were able to cause greater damage to P. eryngii. One of the mushroom cultivars, P. ostreatus 8 was the most resistant to all Trichoderma spp.. Chitinolytic mycotoxin released by Trichoderma spp. caused 52.7% damage to Pleurotus. Mycotoxins released by T. longibrachiatum caused the greatest damaged(78.6%) on P. eryngii.

• The Korean Journal of Mycology
• /
• v.25 no.1 s.80
• /
• pp.20-25
• /
• 1997

In comparison of three Pleurotus species and their selfed and crossed isolates using SDS-polyacrylamide gel electrophoresis of total soluble proteins, Pleurotus ostreatus 201 showed low similarity to selfed or P. ostreatus 201 crossed ones. Pleurotus ostreatus 2042 showed low similarity to selfed or P. ostreatus 2042 crossed ones. However, P. ostreatus $2042{\times}P$. ostreatus 202, P. ostreatus $2042{\times}P$. sajor-caju, and P. ostreatus $2042{\times}P$. ostreatus 900 showed high similarity. Pleurotus ostreatus 202 showed low similarity to selfed or crossed ones. Pleurotus sajorcaju showed low similarity to selfed or crossed ones. Pleurotus ostreatus 900 showed low similarity to selfed or crossed ones. However, selfed P. ostreatus and P. $ostreatus{\times}P$. florida showed high similarity. Pleurotus florida and selfed P. florida showed high similarity, too.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.33 no.5
• /
• pp.791-796
• /
• 2004

This study was peformed to screen the biological activities of Pleurotus ferulea (K5 and K8 strains). The cap of K5 strain is well developed than stalk, and vice versa in K8. The ethanol extract of Pleurotus ferulea exhibited significant free radical scavenging activity (35∼36%), suggesting possible effect on many degenerative diseases originated from the reaction of oxygen species. Acetylcholinesterase inhibitor is proven to be the most effective factor for Alzheimer disease induction, and ethanol extract of Pleurotus ferulea significantly inhibited acetylcholinesterase activity (25∼35%) in uitro. Moreover, ethanol extract of Pleurotus ferulea suppressed liver fibrosis by 3∼12% in uitro. However, Pleurotus ferulea feruled to inhibit glucose uptake in human intestinal cell line. Viability of gastric and colon cancer cells was also not affected by Pleurotus ferulea extract. In conclusion Pleurotus ferulea exhibited significant effect on free radical scavenging, acetylcholinesterase inhibiton and brain cell protection. However, Pleurotus ferulea failed to affect glucose uptake, and cytotoxicity of gastric and cancer cells. In general, K8 revealed more significant effects than K5.

• Journal of the East Asian Society of Dietary Life
• /
• v.11 no.5
• /
• pp.400-408
• /
• 2001

The mushroom pickles were prepared as a processed mushroom product. The changes in pH, total acidity, brix. color and texture of the mushroom pickles (Lentinus edodes, Pleurotus ostreatus, Agaricus bisporus and Pleurotus eryngii) were measured during storage at 4$^{\circ}C$. In addition, sensory evaluations on the mushroom pickles were performed. While the pH of Lentinus edodes and Pleurotus ostreatus pickles declined slowly, the pH of Agaricus bisporus and Pleurotus eryngii pickles declined rapidly during storage. The total acidity of Lentinus edodes pickles rose slowly, while the acidity Pleurotus ostreatus, Agaricus bisporus and Pleurotus eryngii pickles rose rapidly. As for the color of mushroom pickles, "L" , "a" and "b" values changed slightly. The changes in texture were determined by a rheometer Hardness, cohesiveness, springiness, gumminess and brittleness of Lentinus edodes pickles were lower than those of the other mushroom pickles. In the sensory evaluation of mushroom pickles, Lentinus edodes showed higher acceptability ratings than the other mushrooms in taste, color, clearness, texture and overall acceptability. This study showed that among the mushrooms tested, Lentinus edodes was the most acceptable mushroom pickle for storage.

• Journal of Mushroom
• /
• v.3 no.2
• /
• pp.75-78
• /
• 2005

The results of studies for determining the nutrients sources of mycelial growth for optimal condition of Pleurotus cornucopiae are as follows; 1) Optimal carbon source of mycelial growth of Pleurotus cornucopiae is maltose(357mg/25ml/15d); 2) Optimal nitrogen source of mycelial growth of Pleurotus cornucopiae is peptone(347mg/25ml/15d); 3) Optimal organic acid source of mycelial growth of Pleurotus cornucopiae is glutamic acid(389mg/25ml/15d); 4) Optimal vitamin source of mycelial growth of Pleurotus cornucopiae is biotin(399mg/15d); and 5) Optimal C/N ratio for mycelial growth for determining the condition of Pleurotus cornucopiae is 40(398mg/15d).

• Korean Journal of Plant Resources
• /
• v.20 no.1
• /
• pp.38-42
• /
• 2007

The present study was conducted to investigate the translocation of polyphenols, especially catechin derivatives, from mushroom medium mixed with green tea residues into fruiting body of Pleurotus eryngii. Pleurotus eryngii was grown on the media incorporated by mixing or surface-treated with dry materials including leaf petioles and young stems or leaves of green tea. The dry materials treated in medium did not affect plant height and fresh weight of Pleurotus eryngii body. From the samples of Pleurotus eryngii, the eight main catechin derivatives (-)-gallocatechin(GC), (+)-catechin (C), (-)-epicatechin (EC), (-)-epigallocatechin (EGC), (-)-epigallocatechin gallate (EGCG), (-)-gallocatechin gallate (GCG), (-)-epicatechin gallate (ECG), and (-)-catechin gallate (EGCG), and caffeine were analyzed quantitatively by HPLC. The results showed that EGC in Pleurotus eryngii was 45% more detected, when incorporated with the dry materials, than untreated control. Especially, content of EGCG was increased in surface-treated Pleurotus eryngii up to 3.2 ppm, while it was not detected or reduced in control and other treatments. Caffeine content was greatly increased regardless of treatment method, compared with control (0.1ppm), showing 44 fold-amount in Pleurotus eryngii at early growth stage when incorporated with the dry materials into medium. The results indicates that functional catechin derivatives of green tea would be partly translocated into Pleurotus eryngii throught incorporation and surface treatment with residues of green tea plants.