• Food Science and Biotechnology
• /
• v.14 no.6
• /
• pp.828-831
• /
• 2005

The content of vitamin $D_2$, including its precursor ergosterol, was determined in some cultivated mushrooms to manufacture fortified Doenjang (Korean traditional soybean paste) with vitamin D by supplementation with mushroom. Ergosterol was the most abundant sterol in the mushrooms (50 to 140 mg/100 g dry weight) but the ergocalciferol portion made up only 0.065% (Pleurotus eryngii) to 2.5% (stipe part of Lentinus edodes, shiitake) of the total vitamin $D_2$ of each mushroom. Changes in these compounds in L. edodes caused by UV or solar irradiation were also evaluated. Ergocalciferol content in the pileus part of L. edodes went up to $424\;{\mu}g/100\;g$ dry weight and ergosterol levels reached 139.3 mg per 100 g dry weight at maximum levels. Ergocalciferol content increased about 50% when exposed to solar radiation and increased 377% with UV irradiation. These compounds level in Doenjang was enriched as much as supplied UV irradiated L. edodes powder to before fermentation, and the supplemented mushroom did not influence the palatability of Doenjang.

• Journal of Mushroom
• /
• v.13 no.3
• /
• pp.237-242
• /
• 2015

A new brown button mushroom cultivar, 'Hogam', C34 line, was made by crossing homokaryons, ASI1164-37 and ASI1175-66, selected by RAPD analysis and by cultivating three times. Mycelium of 'Hogam' on CDA (compost dextrose agar) media grew well at $25^{\circ}C$. The optimum pin-heading temperature of new variety and optimum growing temperature was $14-18^{\circ}C$. The thickness of the mature cap and stipe were thicker than a control, 'Dahyang' that developed in 2010. The color of pileus was light brown and lighter than 'Dahyang'. Days required from casing to first harvesting were three days longer than control strain, but the weight of harvested fruiting body increased by 1.35 times. 'Hogam' cultivar are expected to contribute to the diversification of domestic mushroom cultivars.

• Journal of Mushroom
• /
• v.10 no.4
• /
• pp.198-202
• /
• 2012

Recently, Pleurotus eryngii, King oyster mushroom, is main item of exportation in South Korea. For safe transportation to Europe and USA, it is necessary to elucidate suitable conditions of storage and treatment of post-harvest during long shipping period. For the selection of suitable package type, P. eryngii were stored at $0^{\circ}C$ and $4^{\circ}C$ after trimming and non-trimming package. Whole mushroom were packed with polypropylene anti-fog film about 400g. The weight loss ratio and elongation of pileus were increased with increasing storage time and temperature. There were little differences between trimming and non-trimming type in freshness at low temperature storage, $0^{\circ}C$ and $4^{\circ}C$. However, the freshness of non-trimming type P. eryngii at room temperature after low temperature storage is longer than that of trimming type. It was found that the optimum storage temperature and post-harvest treatment of P. eryngii were $4^{\circ}C$ and non-trimming type, respectively.

• The Korean Journal of Mycology
• /
• v.39 no.3
• /
• pp.175-179
• /
• 2011

Light wavelength is the major factor of fruit body development associated with mushroom cultivation, but its wavelength range in Pleurotus eryngii is poorly understood. Using four kinds of light emitting diode (LED) including blue (475 nm), green (525 nm), yellowed (590 nm) and red (660 nm), we investigated to elucidate suitable light wavelength during primordium formation and fruit body development of P. eryngii on bottle cultivation. Primordia formation did not occur in blue light and red light. The morphological properties of fruit body in fluorescent lamp and blue light irradiation were showed thicker and larger pileus than those in other LEDs. However, length of stipe in fluorescent lamp and blue light was shorter than that of other LEDs. The DPPH radical was high in blue light, green light, and yellow light except for red light, and the polyphenol was high in four kinds of LED sources. And ergosterol was the highest in the green light. Thus, the high-quality mushroom production of P. eryngii is possible to green light condition considering productivity and functional materials.

• The Korean Journal of Mycology
• /
• v.39 no.3
• /
• pp.231-234
• /
• 2011

This study was performed to develop new Hypsizygus marmoreus cultivars that have enhanced functional materials and improved physiological characteristics with mutagenesis by gamma ray irradiation. Protoplasts of H. marmoreus brown strain HYM-056 were irradiated by gamma ray for mutagenesis, and then 2,000 clones of mutants were randomly selected and the fruiting bodies were induced by bottle culture. Among them, 157 isolates with fast-growing, heavy and many fruiting body-producing were selected. The isolates were cultured in plastic bottle containing rice bran, barley hulls and fir sawdust to form the fruiting bodies. About 100 days after inoculation, characteristic of fruiting bodies were investigated. The isolates were divided into 6 groups based on color, shape and size of pileus, and length, diameter, number and weight of stipe. In addition, the genetic variation of the isolates was analyzed by URP-PCR fingerprinting.

• Journal of the Korean Wood Science and Technology
• /
• v.29 no.4
• /
• pp.79-88
• /
• 2001

Lectin was isolated from shiitake mushroom (Lentinula edodes) with 0.15 M NaCl solution, and purified by the following procedures : precipitation by ammonium sulfate, anion exchange column chromatography on DEAE Sephadex A-50 and hydroxyapatite column chromatography. The fresh pileus part of the mushroom contained more than two times of lectin compared to the stipe part, and lectins and its activity were reduced by heating. The extraction yield of crude lectin was 46.03%, 28% yield after purification on on DEAE Sephadex A-50 column chromatography. Some amino acids, aspartic acid, serine, alanine and histidine, were increased by purification process. Relatively low molecular weight parts of lectin had the agglutinating activity for rabbit blood, and its molecular weight was about 23 kDa The molecular weights of purified lectins, LA-a and LB-b, by the hydroxyapatite column chromatography were 24 kDa and 23 kDa, respectively.

• Journal of Korean Society of Forest Science
• /
• v.85 no.2
• /
• pp.225-237
• /
• 1996

The cultural characteristics of fruit bodies formation in the two selected strains(brown and yellow strain) of winter mushroom collected in Korea were investigated. The effects of various environmental conditions and physicochemical pretreatments were evaluated by the character of fruit bodies. There was no differences between two strains in non-selectivity of media, optimum temperature($11^{\circ}C{\sim}15^{\circ}C$), relative humidity(90%), and illumination(60 lux). In the application of alternated temperature (the best condition : $5^{\circ}C{\cdot}10^{\circ}C$ and $5^{\circ}C{\cdot}15^{\circ}C$), ultraviolet ray(30~50 seconds), electricity(5 seconds), thiamine hydrochloride(0.05~0.1%), urea, and IAA as a pretreatments, there was no differences between two strains. The brown strain had larger pileus and longer stipes than these of the yellow strain, while the yellow strain yielded more weight and number of the fruit body formation than the brown strain.

• Journal of Mushroom
• /
• v.9 no.3
• /
• pp.101-104
• /
• 2011

We aimed to develop a new variety of Neolentinus lepideus from about forty strains by bag culture. To this end, "Solhyang" which means pine smell in Korean was selected as a new commercial variety of N. lepideus. N. lepideus have yellow pileus and pine smell, which characteristics make a favorable impression on the far east Asia, Korean and Japanese. The optimum temperatures for mycelial growth and fruit body development ranged $26{\sim}32^{\circ}C$ and $18{\sim}20^{\circ}C$, respectively. The required periods of mycelial incubation and fruit body growth were 30 days and 7 days, respectively. The fresh weight of fruit body was 115g/kg with pine sawdust and corn meal power(9:1, v/v) substrate.

• Korean Journal of Plant Resources
• /
• v.15 no.2
• /
• pp.128-134
• /
• 2002

Content of crude protein in both pileus and stalk increased progresively as growth period became longer and then decreased at old stage. Contents of ash and reducing sugars followed the same trend as that of the crude protein. However, content of crude lipid decreased as growth progressed more. Seventeen kinds of amino acid were detected in Lentinula. Content of total amino acid increased as mushroom grew more, but decreased after old stage. The amino acid such as Glu, His, Gly and Ala were contained with relatively large amount in Lentinula. Content of free amino acid showed the similar trends as that of total amino acid. Contents of most of the mineral increased as growth period progressed, but K content decreased as growth period became longer. Contents of K and P were much higher than contents of other mineral. The major fatty acid contained in Lentinula were linoleicacid, palmitic acid and oleic acid. The large amount of volatile component in Lentinula was 1-octen-3-ol, so that this material was speculated to be major source of perfume. Other perfumic materials such ethyl acetate, 3-octanone, ethanol, (E)-2-octenal, 4-octen-3-one, acetaldehyde, ethyl formate were also contained in Lentinula, especially in pilous.

• The Korean Journal of Mycology
• /
• v.48 no.3
• /
• pp.345-353
• /
• 2020

As part of the mushroom surveys in the unexplored areas of Korea in 2019 and 2020, a phalloid fungus was found in a saline sand beach. The specimen was mainly characterized by its reticulate pileus and violet volva with well-developed rhizomorphs. Based on ribosomal DNA internal transcribed spacer (ITS) sequencing and morphological characteristics, the specimen was identified as Phallus hadriani. Additionally, a morphological comparison of closely related species was performed. This study describes for the first time the presence of P. hadriani in Korea.