• The Korean Journal of Mycology
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• v.9 no.3
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• pp.133-139
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• 1981

Two hundred forty seven isolates obtained from 21 white or cream-colored mushroom strain by single spore isolation or multiple spore germination were compared type of mycelial growth in vitro and yield trial in a preliminary test. As a result of these tests, four isolates were selected and compared the yields of sporophores with those of 505 and 702 which are leading strains in mushroom production. The newly selected isolate No. 705 showed high yield of mushroom with good quality as described below. 1. The isolate No. 705 produced 13% more mushrooms than those from the strain No. 703. Both produced creamy type of mushroom. The isolate No. 705 showed high blanching yield ratio and moderate resistance to Mycogone perniciosa. 2. For the isolate No. 705 obtained by multiple spore germinations, the optimum temperature of mycelial growth was $25^{\circ}C$, also the mycelial growth was better at $15^{\circ}C$ than others, optimum moisture content of the compost was 65% and optimum casing soil pH for mycelial growth was 7.8. 3. The new isolate No. 705 produced more number of sporophores and the ratio between parts of sporophores were intermediate of those from the strains No. 505 and No. 703.

• Journal of Mushroom
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• v.13 no.3
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• pp.233-236
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• 2015

This report is the result of devising a method for utilizing the device of the load cell to maintain a constant water content of the medium every day to prepare a cultural substrates with the mixer for growing mushrooms bottle cultivation. A load cell was device under the medium mixer. It is developed when the device reaches the weight calculated as amount of substrate bottled and number of the bottle, it is automatically terminated by water injection. In addition, measuring the water content of each medium and the total weight of the medium reaches the target moisture content were calculated by using the program Cheong et al. (2015). Enter the total weight of the medium on the display unit of the load cell, when starting the water supply to reach the weight-based mixing media, the water supply is stopped. This method can improve the convenience by reducing the user's trouble in repeated work medium prepared by automating water supply. The suitable moisture content of the mixed medium for some kind of mushroom can be improved by the composition accuracy. And mycelial culture period, primordial period, mushroom growing period is maintained even of the medium can be produced stably. Therefore, it is possible to achieve a stable management of the mushroom farm according to mushroom quality and quantity stable throughout the year.

• Journal of Mushroom
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• v.21 no.4
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• pp.247-253
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• 2023

In this study, we examined the effects of gamma irradiation dosage on the mycelial growth of Auricularia auricula-judae and performed analyses of fruiting body yield, growth characteristics, taste, fragrance, and mineral composition. Assessments of mycelial growth in response to gamma irradiation at different intensities revealed an enhancement in the growth of fungi exposed to irradiation at 200 Gy. Fruiting body yield was also highest at 200 Gy, followed by 800 Gy and the control group. On the basis of these observations, we subsequently applied gamma ray doses of 200 and 800 Gy to examine the effects of irradiation on fungal quality characteristics. In terms of the taste of fruiting bodies, we detected no significant differences among the control, 200 Gy, and 800 Gy groups. Contrastingly, with respect to fragrance, we found that fungi treated with 200 Gy were characterized by a pattern that differed from those of the control and other treatment groups. Furthermore, whereas we detected no significant difference among treatments with respect total dietary fiber content, calcium content was found to be higher in the treatment groups compared with the control group, with the highest content being measured in fungi exposed to 800 Gy irradiation. Copper content was confirmed to be higher in the control group, whereas there were no significant differences between the fungi irradiated with 200 and 800 Gy. Contrastingly, the highest levels of zinc were detected in response to 200 Gy irradiation, followed by 800 Gy. Collectively, our findings thus indicate that gamma irradiation can contribute to promoting increases in the fruiting body yield and mineral contents of mushrooms.

• Journal of Mushroom
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• v.14 no.2
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• pp.64-69
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• 2016

Pleurotus eryngii is one of the most widely cultivated and important edible mushrooms. However, the shelf life of the fruiting body is short, which. To solve this problem, a new cultivar, DanBi 5Ho, of Pleurotus eryngii was developed by mono-mono crossing between monokaryotic strains derived from KNR2598 and KNR2610. The optimum temperature formycelial growth was 25 and that forfruiting body development was 15-16. The quality did not change after a period of 40.0 d at 4. This result was significantly different compared to that ofthe control strain Knneuari 2 Ho. Analysis of genetic characteristics of the new hybrid strain DanBi 5Ho revealeda different profile thanthat of the parental and control strains when random amplification of polymorphic DNA (RAPD) primers we used. The results obtained from this study show that DanBi 5Ho is a new hybrid strain, characterized by improved storability after harvesting.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.11
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• pp.2603-2608
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• 2015

Mushroom is a high in protein, low calorie food and has dietary fiber, vitamins, iron and minerals such as zinc. It is called that mushroom is one of the biggest concerns for healthy foods. When we make the artificial cultivation of mushroom, one of the greatest influence element is temperature. In this regard, farmers passively measure temperatures in the greenhouse as inaccurate way such as by the naked eyes. In this paper, we constructed a display system in order to improve the efficiency of manual management of temperature based on the influence of temperature on the mushroom. In related to the methods of mushroom cultivation, the recent technology apply the new technology such as sensors and IT convergence services. And then cultivating mushroom is managed effectively. In this paper, we implement an automatic display system for sensing data. By using this function, farmers could effectively manage environment needed to be grown mushroom, and anticipate the improvement of sales by increasing quality of mushrooms as well.

• Journal of Mushroom
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• v.15 no.1
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• pp.14-20
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• 2017

The oyster mushroom cultivation house typically has multiple layers of growing shelves that cause the disturbance of air circulation inside the mushroom house. Due to this instability in the internal environment, growth distinction occurs according to the area of the growing shelves. It is known that minimal air circulation around the mushroom cap facilitates the metabolism of mushrooms and improves their quality. For the purpose of this study, a CFD analysis FLUENT R16 has been carried out to improve the internal environment uniformity of the oyster mushroom cultivation house. It is found that installing a section of the working passage towards the ceiling is to maintain the internal environment uniformity of the oyster mushroom cultivation house. When all the environment control equipment - including a unit cooler, an inlet fan, an outlet fan, an air circulation fan, and a humidifier - were operated simultaneously, the reported Root Mean Square (RMS) valuation the growing shelves were as follows: velocity 23.86%, temperature 6.08%, and humidity 2.72%. However, when only a unit cooler and an air circulation fan operated, improved RMS values on the growing shelves were reported as follows: velocity 23.54%, temperature 0.51%, and humidity 0.41%. Therefore, in order to maintain the internal environment uniformity of the mushroom cultivation house, it is essential to reduce the overall operating time of the inlet fan, outlet fan, and humidifier, while simultaneously appropriately manage the internal environment by using a unit cooler and an air circulation fan.

• Journal of Mushroom
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• v.5 no.1
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• pp.39-42
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• 2007

This study was carried out to characterize virus-like particles (VLPs) in Pleurotus ostreatus. The white and the dark gray mutants frequently observed in mushroom farms of Pleurotus ostreatus (Wonhyeong-neutari). A 5.8kb segments of dsRNA was detected only in the white mutants but not in the dark gray mutants. The VLPs were purified from the fruit bodies by Polyethylene Glycol (PEG) and ultracentrifugation. Electron microscopy analysis showed that VLPs were isometric about 14, 20~45nm in diameter. Further study is needed to reveal the morphological and yield variations of mushroom strains including VLPs observed in the mushroom farms. Also it is needed to maintain fundamental research for taxonomy, diagnosis, and physiology of VLPs in the mushroom strains.

• Journal of Mushroom
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• v.18 no.3
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• pp.234-243
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• 2020

The physicochemical characteristics and antioxidant activities of Lentinula edodes cultivated with liquid spawn were compared according to the harvest cycle (1-3 cycles). There was no significant difference in moisture content. The crude lipid and crude protein contents tended to decrease according to harvest cycle. The content of β-glucan was the highest in mushrooms after one cycle. The β-glucan content in cycles 2 and 3 was 68.5% and 62.3% that of the content after cycle 1, respectively. Mineral content in the pileus and stipe was similar. The mineral content was highest in the pileus after two cycles. Composition and contents of free amino acids tended to decrease according to the harvest cycle. Contents of essential amino acids were higher in mushroom after one cycle. Total phenol content was highest in the pileus (31.96 mg/100 g) and the stipe (21.10 mg/100 g) after one cycle and tended to decrease with subsequent cycles. The flavonoid content was 11.13 mg/100 g after one cycle and significantly decreased according to the harvest cycle. Antioxidant activities were also highest after one cycle and significantly decreased according to the harvest cycle. When compared to L. edodes cultured for one cycle, L. edodes cultivated with liquid spawn for three cycles was considered to have similar marketability in terms of quality characteristics.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.2
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• pp.743-750
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• 2017

It is important to ensure a uniform temperature distribution in greenhouses for the mushroom cultivation. The air temperature of the mushroom cultivation greenhouse is made uniform by supplying a constant air temperature with the underground air. The mushroom cultivation array in a greenhouse in seven columns and four rows can make smooth air flows between the rows and prevent air differences between the top and bottom. The buoyancy effect in the entering air of 0.5m/s based on following density difference depending on initial internal temperature needs to be considered. The locations of the Fan Coil Unit (FCU) and fan were defined through flow analysis in a greenhouse to distribute the optimal uniform temperature. In this study, the air conditioning system of a greenhouse with a sandwich heat insulting panel shape which is composed of a FCU and fan was designed by flow analysis. A relatively uniform temperature distribution can be formed because the circulation path of air becomes longer in the different locations of the FCU (inlet) and fan (outlet) through the internal temperature and flow analysis. The cultivation and quality uniformity of the mushrooms could be promoted through these environmental improvements.

• Korean Journal of Food Science and Technology
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• v.31 no.1
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• pp.128-137
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• 1999

In this study, shiitake mushrooms were dried by hot air, vacuum and freeze drying methods and theire physical properties were compared. Since the pore size affects the amount of absorption, the characteristics of water sorption were investigated at various humidities and temperatures. Results showed that the freeze dried product had the greatest pore area and the highest absorption capacity. However, all the dried samples showed similar quality. The browning degrees were severely changed with increased relative humidities and temperatures. Among these drying methods, the freeze drying gave the greatest change in browning degree. The GAB monolayer moisture contents of the dried shiitake mushroom were $5.3{\sim}7.7%$. The prediction model was also provided using parameters such as relative humidity, temperature and pore area.