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지중버섯 Melanogaster tuberiformis (속검정덩이아재비) 의 동정
구창덕,김재수,Castellano, MiChael 한국균학회 2000 韓國菌學會誌 Vol.28 No.3
A destructive collar rot of Doonggulle (Polygonatum odoratum var. pluriflorum) occurred in an experimental farm at Hamyang Medicinal Plant Experiment Station, Kyongnam ARES in 1999. The disease also observed in farmer's fileds in Hamyang and the infection rate reached up to 12.3%. Upper parts of the infected plants were mostly blighted and white mycelial mats were formed on the lesions or soil lines near the stem. The fungus readily formed sclerotia on PDA and then shapes were globoid or irregular, and sized 0.9∼6.8×0.6∼5.2㎜ (av 2.7∼2.3㎜). Although the fungus showed wide range of mycelial growth temperature, the optimum temperature was about 30℃. The typical sclerotium type and clamp connections of hyphae were found in the fungus Brawn in PDA. The causal fungus was identified as Sclerotium rolfsii on the basis of mycological characteristics and pathogenicity that an the host plants. This is the first report on the collar rot of Polygonatum odoratum caused by Sclerotium rolfsii in Korea.
표고재배용 참나무 원목의 수종별 털두꺼비하늘소의 산란빈도
구창덕,김재수,김길하,한규성,조남석,박재인,민두식 한국임학회 1999 한국산림과학회지 Vol.88 No.4
We observed that the thick outer bark layer of Quercus variabilis hindered oak longicom beetle (Moechotypa diphysis) from laying its eggs in inner bark (secondary phloem tissues). The outer bark thickness of Q. variabilis was average of 7.4㎜, while those of Q. mongolica. Q. serrata and Q. acutissima were average of 1.1㎜, 1.3㎜ and 2.0㎜, respectively. Inner bark thickness was 4.8㎜ in Q. acutissima and 3.6-3.9㎜ in the other oak species. The outer shape of ovipositional holes on the bark by the longicom beetle was 8-12㎜×6-8㎜ wide oval in Q. variabilis, whereas 5-9㎜×1-5㎜ narrow fusiform in the other oak species. Oak longicom beetle drilled average of three ovipositional holes per a 1.2m-long log in a few Q. variabilis logs and its ovipositional rate was 15%. Compared to this, the longicom beetle preferred Q. mongolica. All the 32 investigated logs of this oak species were drilled to have 20 ovipositional holes per a log and ovipositional rate was 56%. One third of the eggs laid already hatched in early June to damage the inner bark. It seems that oak longicom beetle prefers oak species with smooth, thin and stable outer bark surface.
송이와 소나무간의 공생관계에서 외생균근의 시 - 공간적 구조변화
구창덕,박재인,김재수,가강현 한국임학회 2000 한국산림과학회지 Vol.89 No.3
To determine whether the Tricholoma matsutake (pine mushroom, Songyi) is symbiotic or parasitic to Pinus densiflora, structural change in their natural ectomycorrhizas were examined. The mycorrhizal samples were collected at three progressional points in the natural hypogeous colony(shiro) : colony front edge, near the fruiting point and 20㎝ back, The fine roots in the colonies were typical ectomycorrhizas with fungal mantle and Hartig net. However, the T. matsutake mycorrhizas had unique characteristics compared to other types of ectomycorrhizas. That is, spatially the fungal mantle and Hartig net of the T. matsutake mycorrhizas continued to develop along the growing tip, while temporally those structures declined to shrink changing to black brown in the older part of the roots behind the actively growing tip portion. However, there was no mark that the fungal hyphae penetrated into either the cortical cells, endodermal cell layers or stele. The apical tips of the blackened roots remained alive to form new mycorrhizas with other fungi later. Therefore, we conclude that the mycorrhiza of T. matsutake+P. densiflora is rather a dynamic symbiosis that changes its position spatiotemporally as the root grows than either a simple parasitism or symbiosis.
구창덕,김태헌,박용우,이경수,정상용,김재수 한국버섯학회 2005 한국버섯학회지 Vol.3 No.3
원목재배사에서 4월 중에 관리하지 않은 경우 높이에 따른 온도는 지표면-120cm 높이가지 20~22도로 차이가 없었고, 습도 또한 내우 낮은 30~32%였다. 자연적으로 발생된 버섯은 수분이 너무 적어서 화고이나 작았다. 이슬점은 바닥에 서 1.5~6도로 낮은 반면에 버섯의 온도가 12.8~15.0도로 버섯이 메마른 상태가 되었다. 버섯은 상대습도에 크게 좌우되므 로, 지면에서 높아질수록 수분관리가 불리하게 되며 통풍으로서 습도를 균질화 시킬 필요가 있다. 한편 관리된 재배사에서는 온도가 12~17도에 이르며, 상대습도는 45~68%로, 바닥에 가까운 높이에서는 버섯온도가 거 의 이슬점에 도달하여 과습할 정도였다. 오히려 통풍이 필요한 상태였다. 특히 2월 중에 원목을 보온하기 위하여 비닐 을 씌 운 경우는 8~20도, 상대습도는 43~79%였다.