- Characterization of a novel dsRNA mycovirus of Trichoderma atroviride NFCF377 reveals a member of “Fusagraviridae” with changes in antifungal activity of the host fungus
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Jeesun Chun , Byeonghak Na , Dae-Hyuk Kim
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J. Microbiol. 2020;58(12):1046-1053. Published online October 23, 2020
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DOI: https://doi.org/10.1007/s12275-020-0380-1
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Trichoderma atroviride is a common fungus found in various
ecosystems that shows mycoparasitic ability on other fungi.
A novel dsRNA virus was isolated from T. atroviride NFCF377
strain and its molecular features were analyzed. The viral
genome consists of a single segmented double-stranded RNA
and is 9,584 bp in length, with two discontinuous open reading
frames (ORF1 and ORF2). A mycoviral structural protein
and an RNA-dependent RNA polymerase (RdRp) are encoded
by ORF1 and ORF2, respectively, between which is found a
canonical shifty heptameric signal motif (AAAAAAC) followed
by an RNA pseudoknot. Analysis of sequence similarity
and phylogeny showed that it is closely related to members
of the proposed family “Fusagraviridae”, with a highest similarity
to the Trichoderma atroviride mycovirus 1 (TaMV1).
Although the sequence similarity of deduced amino acid to
TaMV1 was evident, sequence deviations were distinctive at
untranslated regions (UTRs) due to the extended size. Thus,
we inferred this dsRNA to be a different strain of Trichoderma
atroviride mycovirus 1 (TaMV1-NFCF377). Electron
microscopy image exhibited an icosahedral viral particle of
40 nm diameter. Virus-cured isogenic isolates were generated
and no differences in growth rate, colony morphology, or
conidia production were observed between virus-infected and
virus-cured strains. However, culture filtrates of TaMV1-
NFCF377-infected strain showed enhanced antifungal activity
against the plant pathogen Rhizoctonia solani but not to
edible mushroom Pleurotus ostreatus. These results suggested
that TaMV1-NFCF377 affected the metabolism of the fungal
host to potentiate antifungal compounds against a plant pathogen,
but this enhanced antifungal activity appeared to be
species-specific.
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Citations
Citations to this article as recorded by  - Molecular characteristics of a novel alternavirus from Trichoderma harzianum
Jeesun Chun, Yo-Han Ko, Dae-Hyuk Kim
Archives of Virology.2026;[Epub] CrossRef - Molecular characterization of a novel partitivirus harboring an additional third dsRNA segment from Trichoderma harzianum
Jeong Eun Kim, Jeesun Chun, Yo-Han Ko, Dae-Hyuk Kim
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Shanshan Xu, Zhenmeng Zhou, Chengmeng Shen, Li Luo, Genhua Yang
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Matheus da Silva Camargo, Sam Edwards, Maressa O. Henrique, Urja Solanki, Tae Young Shin, Bo Huang, Henrik H. De Fine Licht, Marcio C. Silva-Filho, Augusto Schrank, Robert H. A. Coutts, Ioly Kotta-Loizou
Viruses.2025; 17(12): 1593. CrossRef - Co-infection with two novel mycoviruses affects the biocontrol activity of Trichoderma polysporum
Jeesun Chun, Hae-Ryeong Yoon, Sei-Jin Lee, Dae-Hyuk Kim
Biological Control.2024; 188: 105440. CrossRef -
An Outstandingly Rare Occurrence of Mycoviruses in Soil Strains of the Plant-Beneficial Fungi from the Genus
Trichoderma
and a Novel
Polymycoviridae
Isolate
Chenchen Liu, Xiliang Jiang, Zhaoyan Tan, Rongqun Wang, Qiaoxia Shang, Hongrui Li, Shujin Xu, Miguel A. Aranda, Beilei Wu, Lea Atanasova
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Miriam Schalamun, Monika Schmoll
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Subha Das, Sakae Hisano, Ana Eusebio-Cope, Hideki Kondo, Nobuhiro Suzuki
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- Uliginosibacterium flavum sp. nov. isolated from an artificial lake
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Ji Young Kang , Jeesun Chun , Kwang Yeop Jahng
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J. Microbiol. 2017;55(8):595-599. Published online July 28, 2017
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DOI: https://doi.org/10.1007/s12275-017-7002-6
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1,040
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Abstract
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A Gram-negative, facultative anaerobic, rod-shaped, motile
by means of a polar flagellum, greenish-yellow-pigmented
bacterial strain (designated strain JJ3220T) was isolated from
an artificial lake in South Korea and characterized using a
polyphasic approach. The 16S rRNA gene sequence of strain
JJ3220T indicated that the isolate belongs to the family Rhodocyclaceae,
and that it exhibits 96.4% similarity to Uliginosibacterium
paludis KBP-13T. The major cellular fatty acids
of the novel strain were C14:0, C16:0, and summed feature 3
(C16:1 ω6c and/or C16:1 ω7c). Strain JJ3220T had flexirubin-type
pigments. The DNA G+C content of the strain was 62.8%.
The major respiratory quinone and major polar lipid of strain
JJ3220T were ubiquinone-8 and phosphatidylethanolamine,
respectively. Based on the morphological and physiological
properties and biochemical evidence presented, it can be concluded
that strain JJ3220T represents a novel species of the
genus Uliginosibacterium. The type strain Uliginosibacterium
flavum is JJ3220T (=KACC 17644T =JCM 19465T).
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Citations
Citations to this article as recorded by - Uliginosibacterium silvisoli sp. nov., Isolated from Subtropical Forest Soil in Hunan Province, China
Yu Lv, Qi Zhang, Le Liu, Jian He, Shimei Wang, Qirong Shen
Current Microbiology.2025;[Epub] CrossRef - Validation list no. 225: valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology
.2025;[Epub] CrossRef - Decay experiments and microbial community analysis of water lily leaf biofilms: Sediment effects on leaf preservation potential
Brianne Palmer, Sabina Karačić, Shook Ling Low, Kathrin Janssen, Harald Färber, Moritz Liesegang, Gabriele Bierbaum, Carole T. Gee, Przemysław Mroczek
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Aharon Oren, George M. Garrity
International Journal of Systematic and Evolutionary Microbiology
.2018; 68(1): 7. CrossRef
- Viridibacterium curvum gen. nov., sp. nov., isolated from freshwater
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Ji Young Kang , Jeesun Chun , Young Cheol Jung , Kwang Yeop Jahng
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J. Microbiol. 2017;55(7):514-519. Published online June 30, 2017
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DOI: https://doi.org/10.1007/s12275-017-7003-5
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1,001
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0
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3
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Abstract
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A Gram stain-negative, yellowish green-pigmented, facultatively
anaerobic, motile, curved rod-shaped bacterium designated
as strain JJ016T was isolated from an artificial lake in
South Korea, and characterized using a polyphasic approach.
The 16S rRNA gene sequence of strain JJ016T indicated that
the isolate belonged to the family Rhodocyclaceae and exhibited
95.0% identity to Uliginosibacterium gangwonense
5YN10-9T. The major cellular fatty acids of the novel strain
were summed feature 3 (C16:1 ω6c and/or C16:1 ω7c), C16:0, C14:0,
and summed feature 8 (C18:1 ω7c and/or C18:1 ω6c). The DNA
G+C content of strain JJ016T was 61.9 mol%. The major respiratory
quinone and major polar lipid of strain JJ016T were
ubiquinone-8 and phosphatidylethanolamine, respectively.
Based on the morphological and physiological properties and
the biochemical evidence presented, we concluded that strain
JJ016T represents a novel species of a new genus in the family
Rhodocyclaceae, for which the name Viridibacterium curvum
gen. nov., sp. nov. is proposed. The type strain is JJ016T
(=KACC 16899T =JCM 18715T).
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Citations
Citations to this article as recorded by - Validation List no. 223. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology
.2025;[Epub] CrossRef - Denitraticella aggregata gen. nov., sp. nov. a denitrifying benzoate-utilizing bacterium isolated from a terrestrial mud volcano
Galina Slobodkina, Alexander Merkel, Andrei Novikov, Alexander Slobodkin
Systematic and Applied Microbiology.2025; 48(6): 126665. CrossRef -
Niveibacterium microcysteis sp. nov., isolated from a cyanobacterial bloom sample
Mingyeong Kang, Woojun Park
International Journal of Systematic and Evolutionary Microbiology
.2021;[Epub] CrossRef
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