• Korean Journal of Organic Agriculture
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• v.14 no.2
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• pp.219-228
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• 2006

This study was conducted to examine the distribution of arbuscular mycorrhizal fungi (AMF) in the soil grown tomato plants in Damyang districts. We collected twenty one soil samples from the rhizosphere of tomato plants which were grown under structure. Number of spores/g in the soil sized over $500{\mu}m,\;355{\sim}500{\mu}m,\;251{\sim}354{\mu}m,\;107{\sim}250{\mu}m\;and\;45{\sim}106{\mu}m$ were 0.01, 0.02, 0.09, 0.9, and 2.0. Total number of spores/g in the fresh soil were 3.02. Mycorrhizal root infection by vesicles, hyphae and arbuscules were 18.0%, 6.0% and 2.0%. To identify the genus of arbuscular mycorrhizal fungi, isolated mycorrhizal spores from the soil grown tomato plants were inoculated into the host plant of sudangrass and mass propagated for 4 months. As a result of identification, mycorrhizal spores were identified as Glomus sp., Gigaspora sp. and Acaulospora sp.

• The Plant Pathology Journal
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• v.18 no.4
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• pp.169-178
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• 2002

Orchids are evolutionally known to be the most advanced plants in the order Liliales, and comprise approximately 1,000 genera and 35,000 species world-wide. In Korea, more than 110 species of Orchidaceae have been reported to be cultivated or to be collected in the wild. Orchids aye mostly dependant on orchid mycorrhizae(OM) throughout or in part of their life cycle. The OM endomycorrhizae belonging to basidiomycetes or rarley ascomycetes are needed for orchid seed germination. Various fungi, including plant pathogenic, antagonistic and symbiotic fungi, were isolated from the roots of orchid native to Korea. The OM fungi collected from the roots of Cymbidium goeringii were three species of Rhizoctonia namely, R. repens (anamorph state of Tulsanella repens), R. endophytica (Ceratobasidium cornigerum), and an unidentified species (possibly an anamorph of T. calospora). These symbiotic fungi induced peloton in the cortical cells of orchid roots, and differed biologically and in 18s rDNA sequences from plant pathogenic Rhizoctonia species. Also, the mycorrhyzal fungi enhanced the orchid root absorption of nitrogen sources and minerals from the soil. The activity of mycorrhizal fungal hyphae in the roots caused prevention from pathogenic fungi. In nature, the peloton is observed in the cortical cells of Cymbidium goeriingii roots, indicating mycorrhizal colonization in the native orchid roots. On the other hand, pathogenic fungi such as Fusarium and/or Rhizoctonia species are mostly isolated from commercial orchid plants. These suggest that application of symbiotic mycorrhizal fungi should be needed for orchid cultivation in nurseries and at the time of transplanting.

• Mycobiology
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• v.30 no.1
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• pp.13-17
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• 2002

The genomic DNAs were extracted from roots of Glycine max and Sorghum bicolor, and compared with those from spores of two arbuscular mycorrhizal(AM) fungi, Glomus mosseae and Scutellospora heterogama. The partial small subunit(SSU) of ribosomal RNA genes were synthesized and amplified by polymerase chain reaction with the fungal specific primers, AM1 and NS31. By the recent molecular techniques, the presence of another AM fungal DNA were confirmed in the roots of two plants, and three sequences of rDNA fragments amplified were identified to be close to those of G. caledonium, G. fasiculatum and G. proliferum. The two AM fungi, both, were found to colonize at the cortical layers of plant roots collected in the fields, together.

• The Korean Journal of Mycology
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• v.48 no.3
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• pp.209-215
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• 2020

Spores of arbuscular mycorrhizal fungi (phylum Glomeromycota) were isolated from rhizosphere soil collected in Korea. We identified the morphological characteristics of the spores and performed a phylogenetic analysis using the rDNA 18S, 5.8S, and 28S regions. To the best of our knowledge, we confirm the presence of three species of glomeromycotan fungi previously not reported in Korea, namely Acaulospora delicata, Dentiscutata colliculosa, and Racocetra alborosea. We described the morphological characteristics and results of phylogenetic analysis of these species.

• Korean Journal Plant Pathology
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• v.14 no.5
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• pp.536-542
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• 1998

Ten isolates of the orchid mycorrhizal fungi were isolated from the roots of Korean native orchid plants (Cymbidium goeringii) which inhabitate mainly in southern and western areas of Korea. The growth rates and color of the isolates in potato dextrose agar (PDA) were various. Microscopic observations of the hyphae isolated were identified as Rhizoctonia repens and R. endophytica var endophytica or their related species. R. repens was isolated from the roots of the Korean native orchids, but R. endophytica var endophyica was only isolated from the roots of the commercial orchids introduced from foreign countries. Also, the polymorephic patterns of genomic DNA extracted from selected isolates were compared with those of DNA extracted from the orchid mycorrhizal fungi isolated previously and similar band patterns were observed among those isolates. Five isolates of R. repens were selected and cultured at the oatmeal agar for investigating their symbiosis with orchid plants. The symbiotic specificity between orchid plants and isolated orchid mycorrhizal fungi was observe by growing orchids about six months in the greenhouse. The symbiotic responses of the commercial orchid plants with selected isolates were quite different form different isolates due to the genetic variations.

• Mycobiology
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• v.31 no.4
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• pp.196-199
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• 2003

A very reliable and specific method for the identification of fungi in ectotrophic mycorrhizal symbiosis was developed using a specific PCR assay based on the amplification of the ITS1 region. To obtain specific data, an ITS-diagnostic assay was carried out that reveals genera and species specific sequences. Here, an application of one method is presented, which covers the identification of pure mycelia, basidiocarps as well as mixed samples such as ectomycorrhizal roots that were mingled with remains of the host plant. For this purpose a protocol was established that allowed the extraction of DNA from single mycorrhizal roots. In order to perform a specific ITS analysis we generated a new ITS-primer(ITS8) by a multiple alignment of five different genera and species of mycorrhizal fungi. The utilization of ITS1 and ITS8 resulted in specific PCR amplicons, which were characterized by sequencing without purification steps, even when the template DNA was associated with roots.

• The Korean Journal of Mycology
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• v.43 no.2
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• pp.129-132
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• 2015

In this study, orchid mycorrhizal fungi (OMF) were isolated from four terrestrial orchids on Mt. Hambeak, Platnathera chlorantha, Platnathera mandarinorum, Cephalanthera falcate, and Cephalanthera longibracteata. OMF were identified using morphological and sequences analysis of fungal internal transcribed spacer (ITS) regions by specific primer of basidiomycetous orchid mycorrhizas; ITS1-OF and ITS4-OF. Four species of orchid mycorrhizal fungi were identified as Ceratobasidium sp, Epulorhiza anaticula, Tulasnella calospora and Tulasnella sp.

• Korean Journal of Soil Science and Fertilizer
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• v.43 no.6
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• pp.1002-1007
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• 2010

The study was performed to investigate the influence on growth and development of grape-cuttings by arbuscular mycorrhizal (AM) fungi inoculation, AM colonization rate, and the phenomena of mycorrhizal association. Among the grape-cuttings, 'Kyoho' and 'Tamnara' cultivars inoculated with AM fungi showed significantly increase of leaf area, leaf number, total root length and root surface area than non-infected ones. But 'Cambell Early' did not showed any significant difference in total root length and root surface area even after the inoculation. The AM colonization rates in mycorrhizal inoculation treatment were 22.5-32.5% in total average after 8weeks, and were 29.6%, 28.8%, and 48.8% for 'Cambell Early', 'Tamnara', and 'Kyoho' respectively after 12weeks. The AM colonization rate marked very low level in non-colonization control plot.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.3 no.1
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• pp.70-79
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• 2000

Arbuscular mycorrhizal(AM) fungi have significant role for ecosystem structure and function. They are the major component of forest soil ecosystems and critically important for water and nutrient cycling in the system. To understand the ecology of AM fungi the fungal spores were collected, identified and counted in forest soils under various climatic and edaphic conditions. In relation to soil depth 90% of AM fungi spores and mycorrhizas distributed within 15cm soil depth. Number of spores per $100m{\ell}$ forest soil volume was 5 to 36 spores from 1 to 3 fungal species. AM fungal species diversity was higher in warmer climates, and more moist and fertile soils. The most frequently found species were Gigaspora decipiens irrespective of soil moisture and Gi. gigantea irrespective of soil fertility. In the Jeju island the soils of Cryptomeria japonica plantations and Miscanthus sinensis var. purpurascens meadow had more AM spores than the other soils. We suggest AM fungi be considered as keystones species when restoring a disturbed forest ecosystem.

• The Korean Journal of Mycology
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• v.12 no.4
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• pp.175-181
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• 1984

Six species of Glomus and one species of Acaulospora of vesicular-arbuscular (VA) mycorrhizal fungi associated with four salt-marsh plants(Calamagrotis epigeios, Lotus corniculatus, Artemisia scoparia and Imperata cylindrica were isolated from salt-marsh soil. The six species of Glomus were identified as G. albidum(lst type), G. pulvinatum(2nd type), G. constrictium(3rd type), G. sp.(4th type), G. caledonicum(5th type), and G. sp. (6th type). The one species of Acaulospora was identified as A. scrobiculata(7th type). Three mycorrhizal fungi, G. albidum(l st type), G. pulvinatum(2nd type) and G. sp. (4th type) among the 7VA fungi were the most abundant types. The most common type of VA fungi occurred in rhizosphere soil from each plant was G. sp. (4th type) for Calamagrostis epigeios and Artemesia scoparia equally and G. pulvinatum for Lotus corniculatus and Imperata cylindrica equally.