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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Korean Journal of Mycology
Journal Basic Information
Journal DOI :
The Korean Society of Mycology
Editor in Chief :
Volume & Issues
Volume 9, Issue 4 - Dec 1981
Volume 9, Issue 3 - Oct 1981
Volume 9, Issue 2 - Aug 1981
Volume 9, Issue 1 - Apr 1981
Selecting the target year
Producibility of Aflatoxin by Aspergillus parasiticus in Barley and Their Radiosensitivity
Chang, Hak-Gil ; Markakis, Pericles ;
The Korean Journal of Mycology, volume 9, issue 1, 1981, Pages 1~6
The effect of gamma irradiation on production and accumulation of aflatoxin on natural substrate (barley) by Aspergillus parasiticus NRRL 2999 has been studied in some detail. Gamma irradiation at five doses, 0, 50, 100, 200 and 400 Krad was applied to the grain either soon after moisture equilibration (3 days after inoculation) or 10 days later (13 days after inoculation). And the results were as in the followings. 1. Increase in moisture content from 17% to 25% greatly increased the aflatoxin concentration, especially at zero irradiation dose. 2. Prolongation of the incubation period prior to irradiation from 3 to 13 days resulted in greater accumulation of aflatoxin. 3. Two hundreds Krad applied 13 days after inoculation on barley stored at 25% moisture (100% RH) and
led to higher aflatoxin production than 100 Krad or even 50 Krad. 4. The relative proportion of the principal aflatoxins in relation to irradiation showed that aflatoxin G was elaborated at a significantly higher rate than aflatoxin B.
Effects of Some Environmental Factors on the Mycelial Growth and Mushroom Yield of Agaricus bisporus
Cha, Dong-Yeul ; Park, Jong-Seong ; Shin, Gwan-Chull ;
The Korean Journal of Mycology, volume 9, issue 1, 1981, Pages 7~12
Attempts were made to investigate the effects of the temperature and carbon dioxide concentration in the growing room and soil moisture after casing on the mycelial growth, sporophore formation and mushroom yield of Agaricus bisporus (Lange) Sing. The growing room temperature influenced the mycelial growth in the casing layer after casing and the sporophore formation of Agaricus bisporus. The mycelial growth was the rapidest at
and gradually decreased with the temperature going down, while the sporophore formation and mushroom yield were the best at
. The other factor which affected the mycelial growth and sporophore formation was the moisture content of casing soil. The mycelial growth was the best at 70 percent moisture, and the sporophore formation and mushroom yields were the highest at 60 percent moisture. The concentration of carbon dioxide in the growing room after casing had an important effect upon the mycelial growth in the casing layer and the sporophore formation. When the concentration of carbon dioxide was 0.16 percent, the mycelial growth and the sporophore formation were not inhibited. At 0.5 to 2.0 percent
the myceilal growth and the sporophore formation were severely decreased. The sporophore size of the mushroom was the maximum when the room temperature during the vegetative mycelium growth was
and the moisture content of casing soil was 70 percent.
Intra- and Intermatings among Strains of Pleurotus ostreatus and P. florida
Go, Seung-Joo ; Cha, Dong-Yeul ; Park, Young-Hwan ;
The Korean Journal of Mycology, volume 9, issue 1, 1981, Pages 13~18
This study was performed to investigate the high yielding potential of Pleurotus ostreatus (Fr.) Quel derived from intermating and intramating of three strains: Local strain, Nonggi 201, and Pleurotus florida Eger. All the strains tested were tetrapola mating systems, and hybridable. Intermating system resulted in more fresh sporophores than those from intramating. The highest yield of fresh sporophores of P. ostreatus was obtained from Nonggi 201 crossed with P. florida, when cultivated on the rice straw substrates.
Studies on Basidiomycetes(I) -On the Mycelial Growth of Agaricus bitorquis and Pleurotus ostreatus-
Hong, Jae-Sik ; Lee, Kap-Sang ; Choi, Dong- Sung ;
The Korean Journal of Mycology, volume 9, issue 1, 1981, Pages 19~24
The mycelial growth of Agaricus bitorquis and Pleurotus ostreatus in synthetic media were carried out by ordinary methods. The optimum pH and temperature for mycelial growth were from pH 6.0 to 6.5 and 25 to
, and from pH 5.0 to 6.5 and
in A. bitorquis and P. ostreatus, respectively. Among the carbon and nitrogen sources, glucose, starch, and peptone showed the good result for the mycelial growth of A. bitorquis, and glucose, fructose, starch and peptone were good for the mycelial growth of P. ostreatus. The yield of mycelium decreased under lower or higher C/N ratio. Also, at the same C/N ratio, the higher the concentration of glucose and peptone, the more the yield was increased. Among various vitamins thiamine, Ca-pantothenate and folic acid were suitable for the mycelial growth of A. bitorquis, and thiamine, folic acid and inositol for the mycelial growth of P. ostreatus. Although pH, total nitrogen and glucose contents of media decreased gradually during culture period the yield of mycelium increased.
Studies on the Antitumor Components of Korean Basidiomycetes(II) -Antitumor Components of Schizophyllum commune and Auricularia auricula-judae-
Lee, Song-Ae ; Chung, Kyeong-Soo ; Shim, Mi-Ja ; Choi, Eung-Chil ; Kim, Byong- Kak ;
The Korean Journal of Mycology, volume 9, issue 1, 1981, Pages 25~29
To investigate antitumor components of Korean higher fungi, the carpophores of Schizophyllum commune and Auricularia auricula-judae collected in Kyeong Buk Province were extracted with hot water or 0.1N-NaOH solution. The concentrated extracts were precipitated by addition of ethanol, and the precipitates were purified by dialyzing through visking tube and polysaccharide fractions were obtained. They were found to show antitumor activity against sarcoma 180 implanted in mice. Especially, the inhibition ratio of the extract of Auricularia adicula-judae was 90.8% in the doses of 100mg/kg/day for the period of ten days. The tumor in five of the eight mice was completely regressed. The components of these aqueous extracts were found to be polysaccharide and protein. The hydrolysis of the respective polysaccharide yielded four monosaccharides. After hydrolysis of the protein fraction, 15 amino acids were identified in the respective fraction of S. commune and A. auricula-judae.
Some Factors Affecting Growth of Diehlomyces microsporus and Chemical Control of Truffle Disease in Cultivation of Agaricus bisporus
Kim, Gwang-Po ; Cha, Dong-Yeul ; Chung, Hoo-Sup ;
The Korean Journal of Mycology, volume 9, issue 1, 1981, Pages 31~37
Mycelial growth and fruit body formation of Diehlomyces microsporus were best on mushroom spawn extract medium and rice bran extract medium, respectively. L-asparagine, fructose and glucose were good nutrient sources for mycelial growth. Optimum temperature for mycelial growth ranged at
. Maximum mycelial growth occurred at pH 5.5 while optimum pH for ascospore germination was 6.0. Mycelial mats of D. microsporus did not survive at
for 60 minutes while ascospores at
for 120 minutes. Damages of fruit body of Agaricus bisporus caused by D. microsporus were maximum when the fruit bodies were infected at spawning and casing on the compost. The truffle disease could be controlled by basamid with
treating on the compost after filling.
Enzymatic Properties of Pectin Esterase from Aspergillus sp.
Song, Hyung-Ik ; Yu, Tae-Shick ; Chung, Ki-Taek ;
The Korean Journal of Mycology, volume 9, issue 1, 1981, Pages 39~43
The enzymatic properties of pectin esterase from Aspergillus sp. were studied. The optimum conditions for the enzyme reaction were pH 4.2 and temperature of
. The crude enzyme was very stable at pH range of
, but about 20 percent of activity was lost at the range of pH
. The crude enzyme was very stable at
for one hour, however almost 100 percent of enzyme activity was lost at
for 30 minutes. The pectin esterase activity of crude enzyme was greatly inhibited by addition of sodium chloride at lower pH range. That is, the inhibition rates of enzyme activity at pH 3.0 and 4.0 were 47% and 28% in concentration of 1M sodium chloride, respectively. The enzyme activity was not affected by sodium chloride at pH 7.0 at different concentration of sodium chloride. Although the enzyme activity was not affected by addition of sucrose, it was slightly inhibited at higher concentration of sucrose.