간행물

한국균학회> 균학회소식

균학회소식 update

KSM NEWS LETTER

  • : 한국균학회
  • : 자연과학분야  >  생물
  • :
  • :
  • : 연속간행물
  • : 반년간
  • : 2288-257x
  • :
  • :

수록정보
수록범위 : 1권1호(1989)~32권1호(2020) |수록논문 수 : 3,671
균학회소식
32권1호(2020년 08월) 수록논문
최근 권호 논문
| | | |

1S1-1 : Diversity of Basal Fungal Lineages in Korea

저자 : Thuong Thuong Thi Nguyen , Sun Jeong Jeon , Hyang Burm Lee

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 13-14 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

Compared to higher fungi (Dikarya), taxonomic and evolutionary studies on the basal fungal lineages are few. Currently there are 16 phyla accepted in the basal lineages. Members of basal fungal groups produce both motile and non-motile sporangiospores. Some species of the basal fungi are important in biotechnological areas, such as production of enzymes, lipids and antifungal proteins, and also known as opportunistic pathogen. To investigate the diversity and distribution of the basal fungi in Korea, different samples were collected from various environmental niches including feces, freshwater, fruit, soil and insect. A total of 174 strains were obtained using a dilution plate, blotter, baiting, and direct incubation methods. The strains were identified at the species level based on the morphological characteristics and phylogenetic analyses of multi loci sequences including the internal transcribed spacer (ITS), small subunit (18S rDNA), D1-D2 of large ribosomal subunit (28S rDNA), translation elongation factor-1α (EF-1α), and actin (act-1) genes. Among them, 127 strains belonged to Mucoromycota with 60 species, 14 genera, and 10 families, and 22 strains belonged to Chytridiomycota with 10 species, 9 genera, and 6 families. The remaining 25 strains were assigned to Mortierellomycota with 7 species, a single genus (Mortierella), and a single family (Mortierellaceae). The dominant genus was Mucor, and predominant species includes Mucor circinelloides, Muc. hiemalis, Mortierella elongata and Mor. alpina. Thirty-seven species were represented as new records and eighteen as new species. Especially, several genera belonging to Chytridiomycota and Mucoromycota were recorded for the first time in Korea. Further studies on the classification of different orders and families within the basal groups are required to expand our knowledge of undiscovered taxa in Korea.

2S1-2 : Gene regulatory networks for conidiogenesis in Aspergillus species

저자 : Ye-eun Son , Mi-kyung Lee , Antonis Rokas , Sandra Loesgen , Daniel Amador-noguez , Kap-hoon Han , Jae-hyuk Yu , Hee-soo Park

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 15-16 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

Conidia are asexual spores that are the main reproductive mode and infectious particles in Aspergillus species. The process of asexual development (conidiogenesis) is sophisticated and is tightly regulated by a variety of positive or negative regulators. Previous studies found that various fungus specific transcription factors coordinate mRNA expression of genes associated with conidiophore formation in Aspergillus nidulans. Especially, VosA, VelB, and WetA are spore-specific transcription factors governing spore formation processes. In this study, we conducted transcriptomic and metabolomics analyses and demonstrated that the gene regulatory network in conidiogenesis. Our results show that the VosA, VelB, and WetA regulate certain genes associated with cell wall integrity, fungal development, mRNA expression of spore-specific genes and trehalose biosynthesis genes. In addition, these three transcription factors are important for conidiophore formation in A. flavus. Overall these results suggest that the roles of VosA, VelB, and WetA and the gene regulatory network for conidiogenesis are conserved in Aspergillus species.

3S2-1 : Molecular genetics and comparative genomics for evaluation of trait related genes and functional analysis in Lentinula edodes

저자 : Hojin Ryu

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 19-20 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

Lentinula edodes is one of the most popular edible mushrooms in the world and contains useful medicinal components, such as lentinan. The light-induced formation of brown film on the vegetative mycelial tissues of L. edodes is an important process for ensuring the quantity and quality of this edible mushroom. However, the molecular mechanisms underlying this critical developmental process remain unclear, especially at the transcriptome and functional genomic level. Here, we performed the integrative analysis of molecular genetics and comparative genomics of a Chamaram cultivar with abnormal dark yellow partial brown film phenotypes, under exposure to different light conditions. We firstly evaluated that key clusters of genes specific to the light-induced phenotypes in the transcriptome analysis. These genes were significantly associated with light sensing, cell wall degradation, oxidoreduction, and carbohydrate metabolic processes by glucanases, chitinases, and laccases, which suggests these processes are involved in the formation of mycelial browning in L. edodes. Furthermore, we successfully identified a gene locus, ABL1 (Abnormal Ḇrowning related to Ḻight 1) involved in the light-dependent abnormal brown film phenotype. The integrated comparative genomic analysis with molecular genetics of the pedigree of Chamaram cultivars clearly supported the correlation of a dominant allele of abl1 in abnormal brown film phenotypes in mycelia. This study systematically analysed the expression patterns and biological function of light-induced browning-related genes in L. edodes. Our findings provide information for further investigations of browning formation mechanisms in L. edodes and a foundation for future L. edodes breeding.

4S2-2 : Epigenetic regulation of fungal development and pathogenesis in the rice blast fungus

저자 : Jaejoon Lee , Jongjune Lee , Mohamed El-agamy Farh , Song-hee Lee , Junhyun Jeon

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 21-22 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

Fungal pathogens have huge impact on health and economic wellbeing of human by causing life-threatening mycoses in immune-compromised patients or by destroying crop plants. A key determinant of fungal pathogenesis is their ability to undergo developmental change in response to host or environmental factors. Genetic pathways that regulate such morphological transitions and adaptation are therefore extensively studied during the last few decades. Given that epigenetic as well as genetic components play pivotal roles in development of plants and mammals, contribution of microbial epigenetic counterparts to this morphogenetic process is intriguing yet nearly unappreciated question to date. To bridge this gap in our knowledge, we set out to investigate histone modifications among epigenetic mechanisms that possibly regulate fungal adaptation and processes involved in pathogenesis of a model plant pathogenic fungus, Magnaporthe oryzae. For systematic and comparative analysis of histone modifications, we carried out functional analysis of genes encoding histone modifying enzymes in M. oryzae. Here I provide examples of such analyses demonstrating how histone acetylation and methylation is implicated in regulating important aspects of fungal pathogenesis. Current analysis of histone modifying enzymes is followed by ChIP-seq and RNA-seq experiments to pinpoint the genes that are controlled by particular histone modifications. We anticipate that our work will provide not only the significant advances in our understanding of epigenetic mechanisms operating in microbial eukaryotes but also basis to expand our perspective on regulation of development in fungal pathogens.

5S3-1 : Production and Characterization of Cardiovascular Bioactive Compounds from Yeasts

저자 : Jong-soo Lee

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 25-26 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

To develop new cardiovascular bioactive compounds from yeasts, antihypertensive angiotensin I-converting enzyme (ACE) inhibitors were produced from cell-free extracts of S. cerevisiae and Malassezia pachydermatis G-14 and further purified, characterized. The ACE inhibitory peptide from S. cerevisiae is a novel decapeptide with 1116Da of M.W. and sequence of Tyr-Asp-Gly-Gly-Val-Phe-Arg-Val-Tyr-Thr and its antihypertensive action were also demonstrated by using spontaneus hypertensive rat in vivo test. Potent antidementia beta-secretase (BACE1) inhibitor from cell-free extracts of Saccharomyces cerevisiae was produced (62.2%). The BACE1 inhibitor of S. cerevisiae was maximally produced when it was cultured in YEPD medium containing 2.0% of yeast extract, 0.5% of peptone and 2.0% dextrose at 30°C for 18 h(inhibitory activity : 61.0%). The BACE1 inhibitor was also purified by ultrafiltration, Sephadex G-10 colum chromatography and reverse phase HPLC and characterized. Antidementia acetylcholinesterase inhibitor and GABA as neurotransmitter were produced from wild yeasts obtained in soils and waters of three main rivers of Daejeon metropolitan city were investigated. Pichia silvicola UL6-1 and Sporobolomyces carnicolor 402-JB-1 were finally selected as excellent GABA-producing yeasts. The Pichia silvicola UL6-1 and Sporobolomyces carnicolor 402-JB-1 produced GABA of 134.4 μg/ml and 179.2 μg/ml, respectively. Cell-free extract from Pichia silvicola UL6-1 was showed the highest anti-hyperglycemic α-glucosidase inhibitory activity of 72.3%. Anti-diabetic effect of the cell-free extract-containing GABA from Pichia silvicola UL6-1 was demonstrated in the streptozotocin-induced diabetic SD-rat. Wild yeast strains from flowers, soils and waters are very useful industrial microbes for development of high-valuable medicinal and health-enhancing bioactive compounds.

6S3-2 : Discovery of bioactive secondary metabolites from plant-associated fungi

저자 : Sang Hee Shim

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 27-28 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

Plant-associated microorganisms, sometimes called endophytes, are endosymbiotic microbes which grow in the internal tissues of living plants without causing apparent harm to the host. Since endophytic fungi are known to conserve rich biodiversity, they have been considered as potential sources for the new drug candidates which have chemically novel structures. In this study, several endophytic fungi were isolated from medicinal plants and cultivated on a large scale for chemical investigation. They were extracted with ethyl acetate, which were subjected to a series of chromatographic methods, leading to the isolation of tens of compounds. In this presentation, 6 strains of endophytes, including Colletotrichum sp., Penicillium sp., and Streptomyces sp. will be introduced to produce many active compounds in quantities. Furthermore, a variety of biological activities were evaluated for the isolated compounds. The isolated compounds were identified by analysis of spectroscopic methods such as 1D-, 2D-NMR, and MS. Details of isolation, structure determination, and biological activities will be discussed.

7S4-1 : Bacillus-Based Biological Control of Ginseng Root Rot and Apple Bitter Rot diseases

저자 : Young Soo Kim , Yongho Jeon

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 31-32 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

Biological control of crop diseases has been increased in the recent years, because of rise in demand from the consumers and growers to reduce the use of chemical pesticides. The biological control using natural antagonistic microorganisms has emerged as a promising alternative, because, the biopesticides exhibit several advantages over the chemical pesticides for the sustainable agriculture. The Bacillus genus encompasses a large genetic biodiversity, and this could be one of the major sources of potential microbial biopesticides because it retains several valuable traits. Bacilli have the capacity to produce spores in unfavorable conditions, which probably helps these microorganisms to survive in the phyllosphere. Beside their spore forming ability, Bacillus species possess several characteristics that enhance their survival in the rhizosphere to possess its effectiveness as a biopesticide. Therefore, in this study, we investigate the versatile utilization of Bacillus based products to suppress ginseng root rot and apple bitter rot, through a mechanism via secondary metabolites. In this view, Bacillus amyloliquefaciens AK-0 (AK-0), an antagonistic bacterium was isolated from ginseng rhizospheric soil based on the in vitro antagonistic activity against phytopathogens. AK-0 was identified as Bacillus velezensis AK-0 (formerly known as Bacillus amyloliquefaciens) using the Biolog system, 16S rRNA gene sequence analysis, and examination of morphological and biochemical characteristics. AK-0 produces a variety of antimicrobial compounds against various air-borne and soil-borne phytopathogens. To understand the genetic diversity and select an appropriate isolate, a deeper insight into bacterial genes at the whole-genome level is necessary. Therefore, we report the complete genome sequence of the AK-0 strain, which has a 3,969,447 bp circular chromosome with 3909 genes and a G+C content of 46%. Cylindrocarpon destructans is a soil-borne pathogenic fungus, can cause primary root-rot disease in ginseng and reduce the root yield of ginseng, resulting in great economic losses in Korea during various seasons. Colletotrichum gloeosporioides causes anthracnose (bitter rot) in several plant species including apple. The culture filtrate (CF) of AK-0 at a lower concentration exhibited the inhibition of conidial germination of C. destructans in comparison with a non-treated control. In the case of disease suppression of apple bitter rot caused by C. gloeosporioides, AK-0 treatment exhibited the suppression of the conidial germination of C. gloeosporioides under in vitro conditions, resulting in the suppression of apple bitter rot. To retain its biocontrol efficacy for a longer period, the strain AK-0 has been formulated with ingredients for commercialization, named AK-0 product formulation (AK-0PF). AK-0PF played a role in the suppression of the mycelial growth of the fungicideresistant pathogen C. gloeosporioides YCHH4 under in vitro conditions. Moreover, AK-0PF exhibited greater disease suppression in matured apples, resulting in a high level of protection against apple bitter rot under field conditions. These results indicated that AK-0 is one of the promising agents in the biocontrol of air borne and soil borne diseases in apple bitter rot and ginseng root rot, respectively for the sustainable agriculture.

8S4-2 : A success story about microbial pest management: Challenges and Opportunity

저자 : Jae Su Kim , Mi Rong Lee , So Eun Park , Tae Young Shin

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 33-34 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

The main goal of pesticide R&D is to control and reduce the population density of target insect pests below an economic threshold and increase crop quality as an integrated crop management. However, the continuous emergence of chemical-mediated residual toxicity, such as neonicotinoid inducing bee collapse and insect resistance have been enforced the regulation of synthetic pesticides (3Rs: residual, resistance and regulation). Synthetic pesticides with novel mode of actions could be developed to overcome insect resistance and reduce environmental toxicity, but at the same time, as an alternative biopesticides with more efficacious control activity could be developed by the advanced technology. Future decisions to select more realistic control options probably depend on the speed of technological development in two areas, chemical and biological pesticides. Now, a strategic collaboration between synthetic pesticides and biopesticides has been progressed, such as M&A in Bayer, Syngenta, BASF with small biopesticide companies to consider high quality agricultural products in a food chain. However, in near the future, biopesticides could be a major asset in pest management thanks to the faster technological development compared to chemical pesticides. So far biopesticides have been developed with the standpoint of environmental safety, but technology of effective control and economic downstream processing could increase the value of biopesticides. In addition, ecological biocontrol should be seriously considered for successful field applications. Lastly in near the future, digital agriculture-based environmental controlling is attractable in enhancing fungal biological performance. A concept of e-biopesticide (ecological, economic downstream, efficacious, environmentally safe, and environment-mediated) could be properly combined with digital agriculture and accelerate the use of biological control agents in the future farming.

9S5-1 : Survey of Fungal Diversity Associated with Aquatic Environments of Freshwater and Seawater

저자 : So Jeong Chu , Hyang Burm Lee

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 37-38 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

In the course of survey of fungal diversity in aquatic environments in Korea, 31 samples of freshwater and seawater were collected in 14 different areas. 220 strains were isolated from the aquatic niches using dilution plating and bating methods. In this study, isolates were classified into 4 phyla, 8 classes, 14 orders, 29 families, and 47 genera. Among them, two new species and four new records were confirmed based on morphological characteristics and sequence (ITS, LSU, BenA, CaM) analyses. CNUFC MRM4 strain was phylogenetically placed into distinct clade in Talaromyces tree. The strain was also morphologically distinguished from related species of Talaromyces, showing that it is new to science. CNUFC HJW3 strain was clearly distinct from related Albifimbria species, showing that it is new species. In addition, CNUFC-YP9, -BE7, -DMW9, and -YP40 strains were confirmed as Chrysosporium lobatum, Paraconiothyrium lini, Paraphaeosphaeria neglecta, and Purpureocillium lavendulum species, respectively showing that they have not been previously reported in Korea. Our study will lead to a better understanding of fugal diversity associated with aquatic environments such as seawater and freshwater niches.

10S5-2 : Functional analysis of the cyclase-associated protein in Colletotrichum scovillei

저자 : Hyun-hoo Park , Kyoung Su Kim

발행기관 : 한국균학회 간행물 : 균학회소식 32권 1호 발행 연도 : 2020 페이지 : pp. 39-40 (2 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

Colletotrichum scovillei is the causal agent which causes pepper anthracnose disease and enormous economic losses. cAMP-PKA signaling pathway is known for development and pathogenicity in pathogenic fungi, but its roles remain uncovered in C. scovillei. In general, cAMP is synthesized by adenylate cyclase (AC) and binds to the two regulatory protein kinase A (PKA) subunits and leading to the activation of catalytic PKA subunits. To understand the mechanisms of infection progress and interaction of host-pathogen in C. scovillei, we analyzed cyclase-associated protein (CAP) gene in this study. CAP is known to interact with adenylate cyclase and has actin binding domain. Deletion of CsCAP1 showed various defects in pepper anthracnose pathogen, such as reduction of mycelial growth, conidiogenesis, appressorial development. CsCAP1:GFP had an actin-like localization pattern, localizing to the apical regions in mycelia, in circular structures at the center of developing appressoria. The CsCAP1:GFP signals were highly expressed in mature appressoria. The ΔCscap1 mutant caused smaller lesions on pepper fruit surface, which is resulted from defects in invasive growth. In addition, exogenous cAMP, cutin monomer and CaCl2 treatment partially restored appressorial formation rate of ΔCscap1. Taken together, these results indicated that CsCAP1 plays an important role in hyphal growth, conidiogenesis, appressorial formation and full virulence in C. scovillei.

권호별 보기
가장 많이 인용된 논문

(자료제공: 네이버학술정보)

가장 많이 인용된 논문
| | | |
1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

다운로드

2미국의 비트코인 규제

(2006)홍길동심리학41회 피인용

다운로드

가장 많이 참고한 논문

(자료제공: 네이버학술정보)

가장 많이 참고한 논문

다운로드

2미국의 비트코인 규제

(2006)홍길동41회 피인용

다운로드

해당 간행물 관심 구독기관

충북대학교 농촌진흥청 전남대학교 서울대학교 인천대학교
 11
 6
 6
 5
 4
  • 1 충북대학교 (11건)
  • 2 농촌진흥청 (6건)
  • 3 전남대학교 (6건)
  • 4 서울대학교 (5건)
  • 5 인천대학교 (4건)
  • 6 고려대학교 (4건)
  • 7 순천대학교 (4건)
  • 8 경북대학교 (3건)
  • 9 부경대학교 (3건)
  • 10 서울여자대학교 (2건)

내가 찾은 최근 검색어

최근 열람 자료

맞춤 논문

보관함

내 보관함
공유한 보관함

1:1문의

닫기