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Sun Keun Lee,Kyoung-Tae Lee,Yong-Bae Park,Ga-Heon Jin,가강현,Sang-Tae Seo 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.1
The pine wood nematode (Bursaphelenchus xylophilus) causes pine wilt disease, which is a major problem affecting pine forests. This study aimed to identifymetabolites fromSparassis latifolia that have nematicidal activity and to investigate the effect of water-soluble formulations of the active compounds for use as trunk-injectable control agents against the nematode B. xylophilus. When the submerged cultures of S. latifolia were bioassayed against B. xylophilus, strain KFRI 747 showed the most potent activity (52.8%), followed by KFRI 1080 (44.4%) and KFRI 645 (34.8%); their activities were correlated with the concentration of sparassol in their mycelia. Six fractions (SLE1-6) were obtained from ethyl acetate extracts of the liquid culture medium; nematicidal activity was found only in SLE4 (which included sparassol). Sparassol bioassayed against B. xylophilus and had LC50 and LC95 of 84.92 and 132.13 ppm, respectively. Sparassol was modified to disodium sparassol using NaOH because sparassol was not water-soluble and thus was not useful as an agent for trunk injection. Disodium sparassol exhibited similar nematicidal activity to that found with sparassol. The trunk-injectable nematicides (abamectin and emamectin benzoate) were more effective than sparassol and disodium sparassol in terms of LC50 and LC95 values. However, sparassol has a more simple chemical structure than these compounds and could be more easily synthesized. To our knowledge, this is the first report indicating that disodium sparassol might be useful as nematicide for use against the pine wood nematode.
이태수,이상선,박동규,가강현,이민웅,이윤수,심재욱,손서규,반기원,김광포 한국균학회 1998 韓國菌學會誌 Vol.26 No.3
This study was carried out to obtain the basic data for artificial production of Polyporus umbellatus. Among logs consisted of 16 tree species, the log of Stylax japonica inoculated with Polyporus umbellatus not only produced compact sclerotia of 3∼5 ㎜ in their diameters but resulted in the good mycelial density. Also, the sclerotia were observed on 6 different kinds of logs inoculated with Polyporus umbellatus.
이상선,이민웅,가강현 한국균학회 1990 韓國菌學會誌 Vol.18 No.4
Vesicular-arbuscular mycorrhizal fungi were isolated from the soils of three different plant communities (Cassia mimsoides var. nomame, Themeda triandra var. japonica, Miscanthus sinensis var. purpurascens). Eight azygospores or chlamydospores of VA-mycorrhizal fungi were identified (eight species of four genera), and six among them newly described in Korea (six species of two genera); Glomus aggregatum, Gl. ambisporum, Gl. geosporum, Gl. mosseae, Scutellospora coralloidea, Sc. heterogama.
이상선,백기엽,가강현,이석구 한국균학회 1991 韓國菌學會誌 Vol.19 No.3
Out of the 36 species (22 families) of horticultural plants collected from the horticultural shop around Cheong Ju, the 17 plant species (47.2%) were infected with VA-mycorrhizae in the root tissues. Also, the chlamydospores or azygospores of VA-mycorrhizae were identified (two genera, three species); Acaulospora spinosa, Glomus etinucatum, and G. tortusom. VA-mycorhizae found from the cultivated plants around Korea National University of Education and other area were also identified (four genera, six species); A. myriocarpa, Gigaspora decipiens, G. caledonium, G. glomerulatum, G. microcarpum, and Scutellospora calospora.