1
|
Liu Q, Jiang K, Duan S, Zhao N, Shen Y, Zhu L, Zhang KQ, Yang J. Identification of a transcription factor AoMsn2 of the Hog1 signaling pathway contributes to fungal growth, development and pathogenicity in Arthrobotrys oligospora. J Adv Res 2024:S2090-1232(24)00052-3. [PMID: 38331317 DOI: 10.1016/j.jare.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/20/2024] [Accepted: 02/03/2024] [Indexed: 02/10/2024] Open
Abstract
INTRODUCTION Arthrobotrys oligospora has been utilized as a model strain to study the interaction between fungi and nematodes owing to its ability to capture nematodes by developing specialized traps. A previous study showed that high-osmolarity glycerol (Hog1) signaling regulates the osmoregulation and nematocidal activity of A. oligospora. However, the function of downstream transcription factors of the Hog1 signaling in the nematode-trapping (NT) fungi remains unclear. OBJECTIVE This study aimed to investigate the functions and potential regulatory network of AoMsn2, a downstream transcription factor of the Hog1 signaling pathway in A. oligospora. METHODS The function of AoMsn2 was characterized using targeted gene deletion, phenotypic experiments, real-time quantitative PCR, RNA sequencing, untargeted metabolomics, and yeast two-hybrid analysis. RESULTS Loss of Aomsn2 significantly enlarged and swollen the hyphae, with an increase in septa and a significant decrease in nuclei. In particular, spore yield, spore germination rate, traps, and nematode predation efficiency were remarkably decreased in the mutants. Phenotypic and transcriptomic analyses revealed that AoMsn2 is essential for fatty acid metabolism and autophagic pathways. Additionally, untargeted metabolomic analysis identified an important function of AoMsn2 in the modulation of secondary metabolites. Furtherly, we analyzed the protein interaction network of AoMsn2 based on the Kyoto Encyclopedia of Genes and Genomes pathway map and the online website STRING. Finally, Hog1 and six putative targeted proteins of AoMsn2 were identified by Y2H analysis. CONCLUSION Our study reveals that AoMsn2 plays crucial roles in the growth, conidiation, trap development, fatty acid metabolism, and secondary metabolism, as well as establishes a broad basis for understanding the regulatory mechanisms of trap morphogenesis and environmental adaptation in NT fungi.
Collapse
Affiliation(s)
- Qianqian Liu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, and School of Life Science, Yunnan University, Kunming 650032, China
| | - Kexin Jiang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, and School of Life Science, Yunnan University, Kunming 650032, China
| | - Shipeng Duan
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, and School of Life Science, Yunnan University, Kunming 650032, China
| | - Na Zhao
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, and School of Life Science, Yunnan University, Kunming 650032, China
| | - Yanmei Shen
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, and School of Life Science, Yunnan University, Kunming 650032, China
| | - Lirong Zhu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, and School of Life Science, Yunnan University, Kunming 650032, China
| | - Ke-Qin Zhang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, and School of Life Science, Yunnan University, Kunming 650032, China
| | - Jinkui Yang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, and School of Life Science, Yunnan University, Kunming 650032, China.
| |
Collapse
|
2
|
Li Y, Chen Z, Zhang F, Chen T, Fan J, Deng X, Lei X, Zeng B, Zhang Z. The C 2H 2-type zinc-finger regulator AoKap5 is required for the growth and kojic acid synthesis in Aspergillus oryzae. Fungal Genet Biol 2023; 167:103813. [PMID: 37211343 DOI: 10.1016/j.fgb.2023.103813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/14/2023] [Accepted: 05/15/2023] [Indexed: 05/23/2023]
Abstract
Aspergillus oryzae is an important filamentous fungus widely used for the industrial production of fermented foods and secondary metabolites. The clarifying of the mechanism of the growth and secondary metabolites in A. oryzae is important for its industrial production and utilization. Here, the C2H2-type zinc-finger protein AoKap5 was characterized to be involved in the growth and kojic acid production in A. oryzae. The Aokap5-disrupted mutants were constructed by the CRISPR/Cas9 system, which displayed increased colony growth but decreased conidial formation. Deletion of Aokap5 enhanced the tolerance to cell-wall and oxidative but not osmotic stress. The transcriptional activation assay revealed that AoKap5 itself didn't have transcriptional activation activity. Disruption of Aokap5 resulted in the reduced production of kojic acid, coupled with the reduced expression of the kojic acid synthesis genes kojA and kojT. Meanwhile, overexpression of kojT could rescue the decreased production of kojic acid in Aokap5-deletion strain, indicating that Aokap5 serves upstream of kojT. Furthermore, the yeast one-hybrid assay demonstrated that AoKap5 could directly bind to the kojT promoter. These findings suggest that AoKap5 regulates kojic acid production through binding to the kojT promoter. This study provides an insight into the role of zinc finger protein in the growth and kojic acid biosynthesis of A. oryzae.
Collapse
Affiliation(s)
- Yuzhen Li
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Ziming Chen
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Feng Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Tianming Chen
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Junxia Fan
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Xin Deng
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Xiaocui Lei
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Bin Zeng
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, China; College of Pharmacy, Shenzhen Technology University, Shenzhen 518118, China.
| | - Zhe Zhang
- Jiangxi Key Laboratory of Bioprocess Engineering, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
| |
Collapse
|
3
|
cAMP Signalling Pathway in Biocontrol Fungi. Curr Issues Mol Biol 2022; 44:2622-2634. [PMID: 35735620 PMCID: PMC9221721 DOI: 10.3390/cimb44060179] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 05/31/2022] [Accepted: 06/02/2022] [Indexed: 01/07/2023] Open
Abstract
Biocontrol is a complex process, in which a variety of physiological and biochemical characteristics are altered. The cAMP signalling pathway is an important signal transduction pathway in biocontrol fungi and consists of several key components. The G-protein system contains G-protein coupled receptors (GPCRs), heterotrimeric G-proteins, adenylate cyclase (AC), cAMP-dependent protein kinase (PKA), and downstream transcription factors (TFs). The cAMP signalling pathway can regulate fungal growth, development, differentiation, sporulation, morphology, secondary metabolite production, environmental stress tolerance, and the biocontrol of pathogens. However, few reviews of the cAMP signalling pathway in comprehensive biocontrol processes have been reported. This work reviews and discusses the functions and applications of genes encoding each component in the cAMP signalling pathway from biocontrol fungi, including the G-protein system components, AC, PKA, and TFs, in biocontrol behaviour. Finally, future suggestions are provided for constructing a complete cAMP signalling pathway in biocontrol fungi containing all the components and downstream effectors involved in biocontrol behavior. This review provides useful information for the understanding the biocontrol mechanism of biocontrol fungi by utilising the cAMP signalling pathway.
Collapse
|
4
|
Zhang Q, Liu F, Zeng M, Zhang J, Liu Y, Xin C, Mao Y, Song Z. Antifungal Activity of Sodium New Houttuyfonate Against Aspergillus fumigatus in vitro and in vivo. Front Microbiol 2022; 13:856272. [PMID: 35558127 PMCID: PMC9087332 DOI: 10.3389/fmicb.2022.856272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 03/14/2022] [Indexed: 11/23/2022] Open
Abstract
Aspergillus fumigatus is an important pathogen causing invasive aspergillosis, which is associated with high morbidity and mortality in immunocompromised people. However, the treatment of A. fumigatus infection is a growing challenge, owing to the limited availability antifungal agents and the continual emergence of drug-resistant strains. Drug repurposing is a potential strategy to solve this current problem. Sodium new houttuyfonate (SNH), derived from houttuynin, extracted from Houttuynia cordata, has anti-bacterial and anti-Candida albicans effects. However, whether it has anti-A. fumigatus activity had not been reported. In this study, the antifungal properties of SNH against A. fumigatus, including the standard strain AF293, itraconazole resistant clinical strains, and voriconazole resistant clinical strains, were evaluated in vitro and in vivo. Moreover, the potential mechanism of SNH was characterized. SNH exhibited significant fungicidal activity toward various A. fumigatus strains. SNH also inhibited fungal growth, sporulation, conidial germination and pigment formation, and biofilm formation. Further investigations revealed that SNH interfered with the A. fumigatus cell steroid synthesis pathway, as indicated by transcriptomic and quantitative real-time polymerase chain reaction analyses, and inhibited ergosterol synthesis, as indicated by cell membrane stress assays and ergosterol quantification. Moreover, daily gastric gavage of SNH significantly decreased the fungal burden in mice with disseminated infection (kidney, liver, and lung) and local tissue damage. In addition, the application of SNH downregulated the production of IL-6 and IL-17A. Together, these findings provided the first confirmation that SNH may be a promising antifungal agent for the treatment of A. fumigatus infection.
Collapse
Affiliation(s)
- Qian Zhang
- School of Basic Medical Science, Southwest Medical University, Luzhou, China
| | - Fangyan Liu
- School of Basic Medical Science, Southwest Medical University, Luzhou, China
| | - Meng Zeng
- School of Basic Medical Science, Southwest Medical University, Luzhou, China
| | - Jinping Zhang
- School of Basic Medical Science, Southwest Medical University, Luzhou, China
| | - Yanfei Liu
- Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Caiyan Xin
- School of Basic Medical Science, Southwest Medical University, Luzhou, China
| | - Yingyu Mao
- School of Basic Medical Science, Southwest Medical University, Luzhou, China
| | - Zhangyong Song
- School of Basic Medical Science, Southwest Medical University, Luzhou, China.,Molecular Biotechnology Platform, Public Center of Experimental Technology, Southwest Medical University, Luzhou, China
| |
Collapse
|
5
|
Wei M, Dhanasekaran S, Yang Q, Ngolong Ngea GL, Godana EA, Zhang H. Degradation and stress response mechanism of Cryptococcus podzolicus Y3 on ochratoxin A at the transcriptional level. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.113061] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
6
|
Xin C, Yang J, Mao Y, Chen W, Wang Z, Song Z. GATA-type transcription factor MrNsdD regulates dimorphic transition, conidiation, virulence and microsclerotium formation in the entomopathogenic fungus Metarhizium rileyi. Microb Biotechnol 2020; 13:1489-1501. [PMID: 32395911 PMCID: PMC7415378 DOI: 10.1111/1751-7915.13581] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 04/07/2020] [Indexed: 12/04/2022] Open
Abstract
The GATA-type sexual development transcription factor NsdD has been implicated in virulence, secondary metabolism and asexual development in filamentous fungi. However, little is known about its function in the yeast-to-hypha transition and in microsclerotium formation. In the current study, the orthologous NsdD gene MrNsdD in the entomopathogenic fungus Metarhizium rileyi was characterized. Transcriptional analysis indicated that MrNsdD was involved in yeast-to-hypha transition, conidiation and microsclerotium formation. After targeted deletion of MrNsdD, dimorphic transition, conidiation, fungal virulence and microsclerotium formation were all impaired. Compared with the wild-type strain, the ΔMrNsdD mutants were hypersensitive to thermal stress. Furthermore, transcriptome sequencing analysis revealed that MrNsdD regulated a distinct signalling pathway in M. rileyi during the yeast-to-hypha transition or microsclerotium formation, but exhibited overlapping regulation of genes during the two distinct developmental stages. Taken together, characterization of the MrNsdD targets in this study will aid in the dissection of the molecular mechanisms of dimorphic transition and microsclerotium development.
Collapse
Affiliation(s)
- Caiyan Xin
- School of Basic Medical SciencesSouthwest Medical UniversityLuzhou646000China
| | - Jie Yang
- School of Basic Medical SciencesSouthwest Medical UniversityLuzhou646000China
| | - Yingyu Mao
- School of Basic Medical SciencesSouthwest Medical UniversityLuzhou646000China
| | - Wenbi Chen
- School of Basic Medical SciencesSouthwest Medical UniversityLuzhou646000China
| | - Zhongkang Wang
- Chongqing Engineering Research Center for Fungal InsecticideSchool of Life ScienceChongqing UniversityChongqing400030China
| | - Zhangyong Song
- School of Basic Medical SciencesSouthwest Medical UniversityLuzhou646000China
| |
Collapse
|
7
|
Valente S, Cometto A, Piombo E, Meloni GR, Ballester AR, González-Candelas L, Spadaro D. Elaborated regulation of griseofulvin biosynthesis in Penicillium griseofulvum and its role on conidiation and virulence. Int J Food Microbiol 2020; 328:108687. [PMID: 32474227 DOI: 10.1016/j.ijfoodmicro.2020.108687] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 05/14/2020] [Accepted: 05/23/2020] [Indexed: 10/24/2022]
Abstract
Penicilium griseofulvum, the causal agent of apple blue mold, is able to produce in vitro and on apple a broad spectrum of secondary metabolites (SM), including patulin, roquefortine C and griseofulvin. Among them, griseofulvin is known for its antifungal and antiproliferative activity, and has received interest in many sectors, from medicine to agriculture. The biosynthesis of SM is finely regulated by filamentous fungi and can involve global regulators and pathway specific regulators, which are usually encoded by genes present in the same gene cluster as the backbone gene and tailoring enzymes. In the griseofulvin gene cluster, two putative transcription factors were previously identified, encoded by genes gsfR1 and gsfR2, and their role has been investigated in the present work. Analysis of P. griseofulvum knockout mutants lacking either gene suggest that gsfR2 forms part of a different pathway and gsfR1 exhibits many spectra of action, acting as regulator of griseofulvin and patulin biosynthesis and influencing conidia production and virulence on apple. The analysis of gsfR1 promoter revealed that the regulation of griseofulvin biosynthesis is also controlled by global regulators in response to many environmental stimuli, such as carbon and nitrogen. The influence of carbon and nitrogen on griseofulvin production was further investigated and verified, revealing a complex network of response and confirming the central role of gsfR1 in many processes in P. griseofulvum.
Collapse
Affiliation(s)
- Silvia Valente
- Dept. Agricultural, Forest and Food Sciences (DISAFA), Università degli Studi di Torino, Largo Paolo Braccini 2, 10095 Grugliasco, Italy
| | - Agnese Cometto
- Dept. Agricultural, Forest and Food Sciences (DISAFA), Università degli Studi di Torino, Largo Paolo Braccini 2, 10095 Grugliasco, Italy
| | - Edoardo Piombo
- Dept. Agricultural, Forest and Food Sciences (DISAFA), Università degli Studi di Torino, Largo Paolo Braccini 2, 10095 Grugliasco, Italy
| | - Giovanna Roberta Meloni
- Dept. Agricultural, Forest and Food Sciences (DISAFA), Università degli Studi di Torino, Largo Paolo Braccini 2, 10095 Grugliasco, Italy
| | - Ana-Rosa Ballester
- IATA-CSIC - Instituto de Agroquímica y Tecnología de Alimentos, Calle Catedrático Agustín Escardino 7, Paterna 46980, Valencia, Spain
| | - Luis González-Candelas
- IATA-CSIC - Instituto de Agroquímica y Tecnología de Alimentos, Calle Catedrático Agustín Escardino 7, Paterna 46980, Valencia, Spain.
| | - Davide Spadaro
- Dept. Agricultural, Forest and Food Sciences (DISAFA), Università degli Studi di Torino, Largo Paolo Braccini 2, 10095 Grugliasco, Italy.
| |
Collapse
|
8
|
Analogous and Diverse Functions of APSES-Type Transcription Factors in the Morphogenesis of the Entomopathogenic Fungus Metarhizium rileyi. Appl Environ Microbiol 2020; 86:AEM.02928-19. [PMID: 32005738 DOI: 10.1128/aem.02928-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 01/26/2020] [Indexed: 11/20/2022] Open
Abstract
APSES-type transcription factors (TFs) have analogous and diverse functions in the regulation of fungal morphogenesis processes. However, little is known about these functions in microsclerotium formation. In this study, we characterized two orthologous APSES genes (MrStuA and MrXbp) in the entomopathogenic fungus Metarhizium rileyi Deletion of either MrStuA or MrXbp impaired dimorphic transition, conidiation, fungal virulence, and microsclerotium formation. Compared with the wild-type strain, ΔMrStuA and ΔMrXbp mutants were hypersensitive to thermal and oxidative stress. Furthermore, transcriptome sequencing analysis revealed that MrStuA and MrXbp independently regulate their own distinctive subsets of signaling pathways during dimorphic transition and microsclerotium formation, but they also show an overlapping regulation of genes during these two distinct morphogenesis processes. These results provide a global insight into vital roles of MrStuA and MrXbp in M. rileyi and aid in dissection of the interacting regulatory mechanisms of dimorphism transition and microsclerotium development.IMPORTANCE Transcription factors (TFs) are core components of the signaling pathway and play an important role in transcriptional regulation of gene expression during fungal morphogenesis processes. A prevailing theory suggests an interplay between different TFs regulating microsclerotial differentiation; however, the persisting issue remains that these interplay mechanisms are not clear. Here, we analyzed two members of the APSES-type TFs in Metarhizium rileyi using a gene deletion strategy and transcriptome analysis. Mutants were significantly impaired in microsclerotium formation and dimorphic transition. Transcriptome analysis provided evidence for interacting regulatory mechanisms by the two TFs in microsclerotium formation and dimorphic transition. Furthermore, we investigated their overlapping roles in mediating the expression of genes required for different fungal morphogenesis processes. Characterization of TFs in this study will aid in dissecting the interplay between regulatory mechanisms in fungal morphogenesis processes.
Collapse
|
9
|
Xin C, Xing X, Wang F, Liu J, Ran Z, Chen W, Wang G, Song Z. MrMid2, encoding a cell wall stress sensor protein, is required for conidium production, stress tolerance, microsclerotium formation and virulence in the entomopathogenic fungus Metarhizium rileyi. Fungal Genet Biol 2019; 134:103278. [PMID: 31610212 DOI: 10.1016/j.fgb.2019.103278] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 08/24/2019] [Accepted: 10/09/2019] [Indexed: 01/02/2023]
Abstract
Transmembrane proteins as sensors encoded by fungal genes activate specific intracellular signal pathways in response to stress cues to help the fungus survive in a changing environment. To better understand the role of the cell wall integrity (CWI) pathway in the entomopathogenic fungus Metarhizium rileyi, an ortholog encoding the transmembrane protein Mid2, MrMid2, was identified and characterized functionally. Transcriptional analysis indicated that MrMid2 was involved in dimorphic transition, conidiation, and microsclerotium formation. After a targeted deletion of MrMid2, all three traits were impaired. Compared with the wild-type strain, the △MrMid2 mutants were hypersensitive to thermal stress, and cell wall and oxidative stress. Insect bioassays revealed that △MrMid2 mutants had decreased virulence levels following topical (22.5%) and injection bioassays (38.7%). Furthermore, transcription analysis showed that other genes of the CWI pathway, with the exception of another major sensor protein encoding gene, MrWsc1, were down-regulated in △MrMid2 mutants. These results suggest that MrMid2 plays important roles in dimorphic transition, conidiation, the stress response, virulence, and microsclerotium development in M. rileyi.
Collapse
Affiliation(s)
- Caiyan Xin
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, People's Republic of China
| | - Xiaorui Xing
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, People's Republic of China
| | - Fen Wang
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, People's Republic of China
| | - Jiexing Liu
- Department of Geriatrics, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China
| | - Zhuonan Ran
- Department of Geriatrics, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China
| | - Wenbi Chen
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, People's Republic of China
| | - Guangxi Wang
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, People's Republic of China
| | - Zhangyong Song
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, People's Republic of China.
| |
Collapse
|
10
|
Wang Z, Yang J, Xin C, Xing X, Yin Y, Chen L, Song Z. Regulation of conidiation, dimorphic transition, and microsclerotia formation by MrSwi6 transcription factor in dimorphic fungus Metarhizium rileyi. World J Microbiol Biotechnol 2019; 35:46. [PMID: 30825005 DOI: 10.1007/s11274-019-2619-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 02/23/2019] [Indexed: 11/25/2022]
Abstract
Microsclerotia (MS) produced in the liquid culture of the dimorphic insect pathogen Metarhizium rileyi can be used as a mycoinsecticide. Bioinformatics analysis demonstrated that the cell cycle signaling pathway was involved in regulating MS formation. To investigate the mechanisms by which the signaling pathway is regulated, a cell cycle box binding transcription factor MrSwi6 of M. rileyi was characterized. MrSwi6 was highly expressed during periods of yeast-hypha transition and conidia and MS formation. When compared with wild-type and complemented strains, disruption of MrSwi6 significantly reduced conidia (15-36%) and MS formation (96.2%), and exhibited decreased virulence levels. Digital expression profiling revealed that genes involved in antioxidation, pigment biosynthesis, and ion transport and storage were regulated by MrSwi6 during conidia and MS development. These results confirmed the significance of MrSwi6 in dimorphic transition, conidia and MS formation, and virulence in M. rileyi.
Collapse
Affiliation(s)
- Zhongkang Wang
- Chongqing Engineering Research Center for Fungal Insecticide, School of Life Science, Chongqing University, Chongqing, 400030, People's Republic of China
| | - Jie Yang
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, People's Republic of China
| | - Caiyan Xin
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, People's Republic of China
| | - Xiaorui Xing
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, People's Republic of China
| | - Youping Yin
- Chongqing Engineering Research Center for Fungal Insecticide, School of Life Science, Chongqing University, Chongqing, 400030, People's Republic of China
| | - Li Chen
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, People's Republic of China
| | - Zhangyong Song
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, People's Republic of China.
| |
Collapse
|