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RISS 인기검색어
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- 저자 : 가강현 ( Ga Gang Hyeon ) (검색결과 3 건)
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허태철 ( Heo Tae Cheol ),박현 ( Park Hyeon ),가강현 ( Ga Gang Hyeon ),주성현 ( Ju Seong Hyeon ) 한국산림과학회 2004 한국산림과학회지 Vol.93 No.1
Changes in soil physicochemical properties around the fairy rings of Tricholoma matsutake were monitored to figure out whether the mycorrhizal fungus induced significant changes in soil ecosystem or not. This study was conducted to investigate the impact of formations of Tricholoma matsutake fairy ring on the dynamics of soil physicochemical properties by dividing the surveyed area into 4 zones such as `zone of decayed mycorrhizae`, `zone of mycorrhizae for fruiting`, `zone of physiologically active mycorrhizae` and `zone of roots free from mycorrhizal infection` and by dividing the surveyed seasons which were March, June, August and October. The gaseous phase indicated that T. matsutake was aerobic fungus. The liquid phase and the moisture content showed the smallest in the soils with physiologically active mycelial cluster of T. mutsutake. which manifested that the fungus has hydrophobic mycelia. We noticed that the expansion of hyphae in the fairy ring resulted in the changes of sand and silt from the view point of particle size distribution. The content of sand was the highest in front of fairy ring (82.73%) followed by that at the zone of physiologically active mycelial cluster (81.12%), while the content was the lowest in late October (74.83%) among the assaying times. The content of silt was the highest in the zone of mycorrhizae for fruiting (12.50%) around the region of fairy rings, and in late October (14.68%) among the assaying times. That is, the expansion of mycorrhizal hyphae was supposed to induce a weathering of sand particles. Soil pH was the lowest at the zone of physiologically active mycelial cluster (4.69) while the pH was the highest at the zone of decayed mycorrhizae (5.04). This phenomenon indicated that T.matsutake is an acidophil fungus and may produce some special chemicals to reduce the soil pH temporarily. Available phosphate (P²O5) content was the highest at the zone of physiologically active mycelial cluster, which allow us to suppose that the solubility of phosphorus was accelerated by T . mutsutake. Potassium content was the highest at zone of physiologically active mycorrhizae while the lowest at zone of roots free from mycorrhizal infection, which indicated that the exchangeable cations were accumulated in the zone of fairy ring. Carbon, total nitrogen contents, and C/N ratio were also the highest at the zone of physiologically active mycorrhizae. In seasonal changes, carbon and total nitrogen contents were the lowest in the initiation stage of fruiting (August), and C/N ratio reached maximum from the mycorrhizae developing season (June) to the initiation season of fruiting (August). The results indicated that the mycorrhizal fungus induced significant changes in soil ecosystem since the zone of physiologically active mycorrhizae showed significant differences comparing with other zones.
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HPLC를 이용한 한국산 송이의 methyl trans-cinnamate 함량 분석
이위영 ( Lee Wi Yeong ),박영기 ( Park Yeong Gi ),안진권 ( An Jin Gwon ),가강현 ( Ga Gang Hyeon ) 한국산림과학회 2003 한국산림과학회지 Vol.92 No.5
The contents of methyl trans-cinnamate, a significant and major aromatic compound in Tricholoma matsutake (pine mushroom), were determined by HPLC (High Performance Liquid Chromatography.). Mushroom sample collected from five sites in Korea were extracted with methanol by ultrasonication. The contents of methyl trans-cinnamate in the pileus and stalk of pine mushroom ranged from 84.8 to 995.7 μg/g and from 4.5 to 45.2 μg/g, respectively. The average contents of methyl trans-cinnamate in the pileus and stalk of pine mushroom from the five sites were 559.1 μg/g and 35.7 μg/g, respectively. From the results of this study, we could conclude that the contents of methly trans-cinnamate varied by different parts (pileus and stalk) and collecting sites. The amounts of methyl trans-cinnamate from tresh T. matsutake were higher than those of dried T. matsutake, Pileus of pine mushroom appeared to contain more methyl trans-cinnamate than did stalk. Additionally, as pileus of pine mushroom developed, the aroma content increased as well.
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