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Zeng J, Zhou Y, Lyu M, Huang X, Xie M, Huang M, Chen BX, Wei T. Cordyceps militaris: A novel mushroom platform for metabolic engineering. Biotechnol Adv 2024; 74:108396. [PMID: 38906495 DOI: 10.1016/j.biotechadv.2024.108396] [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: 03/14/2024] [Revised: 06/14/2024] [Accepted: 06/18/2024] [Indexed: 06/23/2024]
Abstract
Cordyceps militaris, widely recognized as a medicinal and edible mushroom in East Asia, contains a variety of bioactive compounds, including cordycepin (COR), pentostatin (PTN) and other high-value compounds. This review explores the potential of developing C. militaris as a cell factory for the production of high-value chemicals and nutrients. This review comprehensively summarizes the fermentation advantages, metabolic networks, expression elements, and genome editing tools specific to C. militaris and discusses the challenges and barriers to further research on C. militaris across various fields, including computational biology, existing DNA elements, and genome editing approaches. This review aims to describe specific and promising opportunities for the in-depth study and development of C. militaris as a new chassis cell. Additionally, to increase the practicability of this review, examples of the construction of cell factories are provided, and promising strategies for synthetic biology development are illustrated.
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Affiliation(s)
- Jiapeng Zeng
- Institute of Food Biotechnology & College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510642, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510642, China
| | - Yue Zhou
- Institute of Food Biotechnology & College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510642, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510642, China
| | - Mengdi Lyu
- Institute of Food Biotechnology & College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510642, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510642, China
| | - Xinchang Huang
- Institute of Food Biotechnology & College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510642, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510642, China
| | - Muyun Xie
- School of Bioengineering, Zunyi Medical University, Zhuhai, Guangdong 519090, China
| | - Mingtao Huang
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China.
| | - Bai-Xiong Chen
- School of Bioengineering, Zunyi Medical University, Zhuhai, Guangdong 519090, China.
| | - Tao Wei
- Institute of Food Biotechnology & College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510642, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510642, China.
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Yan HH, Shang YT, Wang LH, Tian XQ, Tran VT, Yao LH, Zeng B, Hu ZH. Construction of a New Agrobacterium tumefaciens-Mediated Transformation System based on a Dual Auxotrophic Approach in Cordyceps militaris. J Microbiol Biotechnol 2024; 34:1178-1187. [PMID: 38563100 PMCID: PMC11180907 DOI: 10.4014/jmb.2312.12003] [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: 12/06/2023] [Revised: 03/03/2024] [Accepted: 03/08/2024] [Indexed: 04/04/2024]
Abstract
Cordyceps militaris is a significant edible fungus that produces a variety of bioactive compounds. We have previously established a uridine/uracil auxotrophic mutant and a corresponding Agrobacterium tumefaciens-mediated transformation (ATMT) system for genetic characterization in C. militaris using pyrG as a screening marker. In this study, we constructed an ATMT system based on a dual pyrG and hisB auxotrophic mutant of C. militaris. Using the uridine/uracil auxotrophic mutant as the background and pyrG as a selection marker, the hisB gene encoding imidazole glycerophosphate dehydratase, required for histidine biosynthesis, was knocked out by homologous recombination to construct a histidine auxotrophic C. militaris mutant. Then, pyrG in the histidine auxotrophic mutant was deleted to construct a ΔpyrG ΔhisB dual auxotrophic mutant. Further, we established an ATMT transformation system based on the dual auxotrophic C. militaris by using GFP and DsRed as reporter genes. Finally, to demonstrate the application of this dual transformation system for studies of gene function, knock out and complementation of the photoreceptor gene CmWC-1 in the dual auxotrophic C. militaris were performed. The newly constructed ATMT system with histidine and uridine/uracil auxotrophic markers provides a promising tool for genetic modifications in the medicinal fungus C. militaris.
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Affiliation(s)
- Huan huan Yan
- College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
- Jiangxi Key Laboratory of Bioprocess Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
| | - Yi tong Shang
- College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
- Jiangxi Key Laboratory of Bioprocess Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
| | - Li hong Wang
- College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
- Jiangxi Key Laboratory of Bioprocess Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
| | - Xue qin Tian
- College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
- Jiangxi Key Laboratory of Bioprocess Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
| | - Van-Tuan Tran
- VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
| | - Li hua Yao
- College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
| | - Bin Zeng
- Shenzhen Technology University, Shenzhen 518118, P.R. China
| | - Zhi hong Hu
- College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
- Jiangxi Key Laboratory of Bioprocess Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China
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Li W, Zou G, Bao D, Wu Y. Current Advances in the Functional Genes of Edible and Medicinal Fungi: Research Techniques, Functional Analysis, and Prospects. J Fungi (Basel) 2024; 10:311. [PMID: 38786666 PMCID: PMC11121823 DOI: 10.3390/jof10050311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/02/2024] [Accepted: 04/22/2024] [Indexed: 05/25/2024] Open
Abstract
Functional genes encode various biological functions required for the life activities of organisms. By analyzing the functional genes of edible and medicinal fungi, varieties of edible and medicinal fungi can be improved to enhance their agronomic traits, growth rates, and ability to withstand adversity, thereby increasing yield and quality and promoting industrial development. With the rapid development of functional gene research technology and the publication of many whole-genome sequences of edible and medicinal fungi, genes related to important biological traits have been mined, located, and functionally analyzed. This paper summarizes the advantages and disadvantages of different functional gene research techniques and application examples for edible and medicinal fungi; systematically reviews the research progress of functional genes of edible and medicinal fungi in biological processes such as mating type, mycelium and fruit growth and development, substrate utilization and nutrient transport, environmental response, and the synthesis and regulation of important active substances; and proposes future research directions for functional gene research for edible and medicinal fungi. The overall aim of this study was to provide a valuable reference for further promoting the molecular breeding of edible and medicinal fungi with high yield and quality and to promote the wide application of edible and medicinal fungi products in food, medicine, and industry.
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Affiliation(s)
- Wenyun Li
- National Engineering Research Center of Edible Fungi, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (W.L.); (G.Z.)
- College of Food Sciences and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Gen Zou
- National Engineering Research Center of Edible Fungi, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (W.L.); (G.Z.)
| | - Dapeng Bao
- National Engineering Research Center of Edible Fungi, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (W.L.); (G.Z.)
- College of Food Sciences and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Yingying Wu
- National Engineering Research Center of Edible Fungi, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (W.L.); (G.Z.)
- College of Food Sciences and Technology, Shanghai Ocean University, Shanghai 201306, China
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Zhao B, Zhang Y, Zhang S, Hu T, Guo Y. Multifactorial interaction of selenium, iron, xylose, and glycine on cordycepin metabolism in Cordyceps militaris. Appl Microbiol Biotechnol 2023; 107:7403-7416. [PMID: 37773218 DOI: 10.1007/s00253-023-12792-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/08/2023] [Accepted: 09/12/2023] [Indexed: 10/01/2023]
Abstract
Cordycepin, a nucleoside analog, is the main antioxidative and antimicrobial substance in Cordyceps militaris. To improve the metabolism of cordycepin, carbon sources, nitrogen sources, trace elements, and precursors were studied by single factor, Plackett-Burman, and central composite designs in C. militaris mycelial fermentation. Under the regulation of the multifactorial interactions of selenite, ferrous chloride, xylose, and glycine, cordycepin production was increased by 5.2-fold compared with the control. The gene expression of hexokinase, ATP phosphoribosyltransferase, adenylosuccinate synthetase, and cns1-3 in the glycolysis, pentose phosphate, and adenosine synthesis pathways were increased by 3.2-7.5 times due to multifactorial interactions, while the gene expression of histidine biosynthesis trifunctional protein and histidinol-phosphate aminotransferase in histidine synthesis pathway were decreased by 23.4%-56.2%. Increasing with cordycepin production, glucose uptake was accelerated, mycelia growth was inhibited, and the cell wall was damaged. Selenomethionine (SeMet), selenocysteine (SeCys), and selenium nanoparticles (SeNPs) were the major Se species in C. militaris mycelia. This study provides a new insight for promoting cordycepin production by regulating glycolysis, pentose phosphate, and histidine metabolism. KEY POINTS: • Cordycepin production in the CCDmax group was 5.2-fold than that of the control. • Glucose uptake of the CCDmax group was accelerated and cell wall was damaged. • The metabolic flux was concentrated to the cordycepin synthesis pathway.
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Affiliation(s)
- Bingjie Zhao
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China
| | - Yong Zhang
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China
| | - Sasa Zhang
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China
| | - Ting Hu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Yanbin Guo
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China.
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Wen H, Meng S, Xie S, Shi H, Qiu J, Jiang N, Kou Y. Sucrose non-fermenting protein kinase gene UvSnf1 is required for virulence in Ustilaginoidea virens. Virulence 2023; 14:2235460. [PMID: 37450576 PMCID: PMC10351473 DOI: 10.1080/21505594.2023.2235460] [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: 11/24/2022] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/18/2023] Open
Abstract
Rice false smut caused by Ustilaginoidea virens is becoming one of the most devastating diseases in rice production areas in the world. Revealing U. virens potential pathogenic mechanisms provides ideas for formulating more effective prevention and control strategies. Sucrose non-fermenting 1 (Snf1) protein kinase plays a critical role in activating transcription and suppressing gene expression, as well as in cellular response to various stresses, such as nutrient limitation. In our study, we identified the Snf1 homolog UvSnf1 and analyzed its biological functions in U. virens. The expression level of UvSnf1 was dramatically up-regulated during invasion, indicating that UvSnf1 may participate in infection. Phenotypic analyses of UvSnf1 deletion mutants revealed that UvSnf1 is necessary for hyphae growth, spore production, and virulence in U. virens. Moreover, UvSnf1 promotes U. virens to use unfavorable carbon sources when the sucrose is insufficient. In addition, deletion of UvSnf1 down-regulates the expression of the cell wall-degrading enzymes (CWDEs) genes under sucrose limitation conditions in U. virens. Further analyses showed that CWDEs (UvCut1 and UvXyp1) are not only involved in growth, spore production, and virulence but are also required for the utilization of carbon sources. In conclusion, this study demonstrates that UvSnf1 plays vital roles in virulence and carbon source utilization in U. virens, and one of the possible mechanisms is playing a role in regulating the expression of CWDE genes.
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Affiliation(s)
- Hui Wen
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou, China
| | - Shuai Meng
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou, China
| | - Shuwei Xie
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou, China
| | - Huanbin Shi
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou, China
| | - Jiehua Qiu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou, China
| | - Nan Jiang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou, China
| | - Yanjun Kou
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou, China
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Zhang ZJ, Yin YY, Cui Y, Zhang YX, Liu BY, Ma YC, Liu YN, Liu GQ. Chitinase Is Involved in the Fruiting Body Development of Medicinal Fungus Cordyceps militaris. Life (Basel) 2023; 13:life13030764. [PMID: 36983919 PMCID: PMC10051443 DOI: 10.3390/life13030764] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/22/2023] [Accepted: 03/10/2023] [Indexed: 03/14/2023] Open
Abstract
Cordyceps militaris is a famous traditional edible and medicinal fungus in Asia, and its fruiting body has rich medicinal value. The molecular mechanism of fruiting body development is still not well understood in C. militaris. In this study, phylogenetically analysis and protein domains prediction of the 14 putative chitinases were performed. The transcription level and enzyme activity of chitinase were significant increased during fruiting body development of C. militaris. Then, two chitinase genes (Chi1 and Chi4) were selected to construct gene silencing strain by RNA interference. When Chi1 and Chi4 genes were knockdown, the differentiation of the primordium was blocked, and the number of fruiting body was significantly decreased approximately by 50% compared to wild-type (WT) strain. The length of the single mature fruiting body was shortened by 27% and 38% in Chi1- and Chi4-silenced strains, respectively. In addition, the chitin content and cell wall thickness were significantly increased in Chi1- and Chi4-silenced strains. These results provide new insights into the biological functions of chitinase in fruiting body development of C. militaris.
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Affiliation(s)
- Zi-Juan Zhang
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology, Changsha 410004, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology, Changsha 410004, China
- Microbial Variety Creation Center, Yuelushan Laboratory of Seed Industry, Changsha 410004, China
| | - Yuan-Yuan Yin
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology, Changsha 410004, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology, Changsha 410004, China
- Microbial Variety Creation Center, Yuelushan Laboratory of Seed Industry, Changsha 410004, China
| | - Yao Cui
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology, Changsha 410004, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology, Changsha 410004, China
- Microbial Variety Creation Center, Yuelushan Laboratory of Seed Industry, Changsha 410004, China
| | - Yue-Xuan Zhang
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology, Changsha 410004, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology, Changsha 410004, China
- Microbial Variety Creation Center, Yuelushan Laboratory of Seed Industry, Changsha 410004, China
| | - Bi-Yang Liu
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology, Changsha 410004, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology, Changsha 410004, China
- Microbial Variety Creation Center, Yuelushan Laboratory of Seed Industry, Changsha 410004, China
| | - You-Chu Ma
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology, Changsha 410004, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology, Changsha 410004, China
- Microbial Variety Creation Center, Yuelushan Laboratory of Seed Industry, Changsha 410004, China
| | - Yong-Nan Liu
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology, Changsha 410004, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology, Changsha 410004, China
- Microbial Variety Creation Center, Yuelushan Laboratory of Seed Industry, Changsha 410004, China
- Correspondence: (Y.-N.L.); (G.-Q.L.); Tel./Fax: +86-731-8562-3490 (Y.N.-L.)
| | - Gao-Qiang Liu
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology, Changsha 410004, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology, Changsha 410004, China
- Microbial Variety Creation Center, Yuelushan Laboratory of Seed Industry, Changsha 410004, China
- Correspondence: (Y.-N.L.); (G.-Q.L.); Tel./Fax: +86-731-8562-3490 (Y.N.-L.)
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Duan X, Yang H, Wang C, Liu H, Lu X, Tian Y. Microbial synthesis of cordycepin, current systems and future perspectives. Trends Food Sci Technol 2023. [DOI: 10.1016/j.tifs.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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GPI-Anchored Protein Homolog IcFBR1 Functions Directly in Morphological Development of Isaria cicadae. J Fungi (Basel) 2022; 8:jof8111152. [DOI: 10.3390/jof8111152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 10/22/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022] Open
Abstract
Isaria cicadae is a famous edible and medicinal fungus in China and Asia. The molecular basis of morphogenesis and synnemal formation needs to be understood in more detail because this is the main source of biomass production in I. cicadae. In the present study, a fruiting body formation-related gene with a glycosylphosphatidylinositol (GPI) anchoring protein (GPI-Ap) gene homolog IcFBR1 was identified by screening random insertion mutants. Targeted deletion of IcFBR1 resulted in abnormal formation of synnemata, impairing aerial hyphae growth and sporulation. The IcFBR1 mutants were defective in the utilization of carbon sources with reduced polysaccharide contents and the regulation of amylase and protease activities. Transcriptome analysis of ΔIcfbr1 showed that IcFBR1 deletion influenced 49 gene ontology terms, including 23 biological processes, 9 molecular functions, and 14 cellular components. IcFBR1 is therefore necessary for regulating synnemal development, secondary metabolism, and nutrient utilization in this important edible and medicinal fungus. This is the first report illustrating that the function of IcFBR1 is associated with the synnemata in I. cicadae.
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Lengyel S, Rascle C, Poussereau N, Bruel C, Sella L, Choquer M, Favaron F. Snf1 Kinase Differentially Regulates Botrytis cinerea Pathogenicity according to the Plant Host. Microorganisms 2022; 10:microorganisms10020444. [PMID: 35208900 PMCID: PMC8877277 DOI: 10.3390/microorganisms10020444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/04/2022] [Accepted: 02/11/2022] [Indexed: 11/16/2022] Open
Abstract
The Snf1 kinase of the glucose signaling pathway controls the response to nutritional and environmental stresses. In phytopathogenic fungi, Snf1 acts as a global activator of plant cell wall degrading enzymes that are major virulence factors for plant colonization. To characterize its role in the virulence of the necrotrophic fungus Botrytis cinerea, two independent deletion mutants of the Bcsnf1 gene were obtained and analyzed. Virulence of the Δsnf1 mutants was reduced by 59% on a host with acidic pH (apple fruit) and up to 89% on hosts with neutral pH (cucumber cotyledon and French bean leaf). In vitro, Δsnf1 mutants grew slower than the wild type strain at both pH 5 and 7, with a reduction of 20–80% in simple sugars, polysaccharides, and lipidic carbon sources, and these defects were amplified at pH 7. A two-fold reduction in secretion of xylanase activities was observed consequently to the Bcsnf1 gene deletion. Moreover, Δsnf1 mutants were altered in their ability to control ambient pH. Finally, Δsnf1 mutants were impaired in asexual sporulation and did not produce macroconidia. These results confirm the importance of BcSnf1 in pathogenicity, nutrition, and conidiation, and suggest a role in pH regulation for this global regulator in filamentous fungi.
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Affiliation(s)
- Szabina Lengyel
- Department of Land, Environment, Agriculture and Forestry (TESAF), University of Padova, Viale dell’Università, 16, 35020 Legnaro, Italy; (S.L.); (F.F.)
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Bayer SAS, INSA Lyon, UMR5240, Microbiologie, Adaptation et Pathogénie, 14 Impasse Pierre Baizet, F-69263 Lyon, France; (C.R.); (N.P.); (C.B.)
| | - Christine Rascle
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Bayer SAS, INSA Lyon, UMR5240, Microbiologie, Adaptation et Pathogénie, 14 Impasse Pierre Baizet, F-69263 Lyon, France; (C.R.); (N.P.); (C.B.)
| | - Nathalie Poussereau
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Bayer SAS, INSA Lyon, UMR5240, Microbiologie, Adaptation et Pathogénie, 14 Impasse Pierre Baizet, F-69263 Lyon, France; (C.R.); (N.P.); (C.B.)
| | - Christophe Bruel
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Bayer SAS, INSA Lyon, UMR5240, Microbiologie, Adaptation et Pathogénie, 14 Impasse Pierre Baizet, F-69263 Lyon, France; (C.R.); (N.P.); (C.B.)
| | - Luca Sella
- Department of Land, Environment, Agriculture and Forestry (TESAF), University of Padova, Viale dell’Università, 16, 35020 Legnaro, Italy; (S.L.); (F.F.)
- Correspondence: (L.S.); (M.C.)
| | - Mathias Choquer
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Bayer SAS, INSA Lyon, UMR5240, Microbiologie, Adaptation et Pathogénie, 14 Impasse Pierre Baizet, F-69263 Lyon, France; (C.R.); (N.P.); (C.B.)
- Correspondence: (L.S.); (M.C.)
| | - Francesco Favaron
- Department of Land, Environment, Agriculture and Forestry (TESAF), University of Padova, Viale dell’Università, 16, 35020 Legnaro, Italy; (S.L.); (F.F.)
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Screening and Functional Verification of Selectable Marker Genes for Cordyceps militaris. J FOOD QUALITY 2021. [DOI: 10.1155/2021/6687768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The selectable marker genes are necessary resistance genes for gene knockout, gene complementation, and gene overexpression in filamentous fungi. Moreover, the more sensitive the filamentous fungi are to antibiotics, the more helpful it is to screen the target transformants. In order to obtain the antibiotic (or herbicide) which can effectively inhibit the growth of Cordyceps militaris and verify the function of the corresponding resistance gene in C. militaris, the sensitivity of C. militaris to hygromycin and glufosinate ammonium was compared to determine the resistance gene that was more suitable for the screening of C. militaris transformants. The binary vector of the selectable marker gene was constructed by combining the double-joint PCR (DJ-PCR) method and the homologous recombination method, and the function of the selectable marker gene in C. militaris was verified by the Agrobacterium tumefaciens-mediated transformation method. The results showed that C. militaris was more sensitive to glufosinate ammonium than hygromycin. The growth of C. militaris could be completely inhibited by 250 μg/mL glufosinate ammonium. The expression cassette of the glufosinate ammonium resistance gene (bar gene) was successfully constructed by DJ-PCR. The binary vector pCAMBIA0390-Bar was successfully constructed by homologous recombination. The bar gene of the vector pCAMBIA0390-Bar was successfully integrated into the C. militaris genome and could be highly expressed in the transformants of C. militaris. This study will promote the identification of C. militaris gene function and reveal the biosynthetic pathways of bioactive components in C. militaris.
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Wang Y, Yang Z, Bao D, Li B, Yin X, Wu Y, Chen H, Tang G, Li N, Zou G. Improving Hypoxia Adaption Causes Distinct Effects on Growth and Bioactive Compounds Synthesis in an Entomopathogenic Fungus Cordyceps militaris. Front Microbiol 2021; 12:698436. [PMID: 34239513 PMCID: PMC8258390 DOI: 10.3389/fmicb.2021.698436] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 05/27/2021] [Indexed: 11/13/2022] Open
Abstract
Cordyceps militaris is an entomopathogenic fungus producing a variety of bioactive compounds. To meet the huge demand for medicinal and edible products, industrialized fermentation of mycelia and cultivation of stromata have been widely developed in China. The content of bioactive metabolites of C. militaris, such as cordycepin, is higher when cultivated on silkworm pupae than on rice or in broth. However, compared with other cultivation methods, C. militaris grows more slowly and accumulates less biomass. The hypoxic environment in pupa hemocoel is one of environmental factor which is not existed in other cultivation methods. It is suggested that hypoxia plays an important role on the growth and the synthesis of bioactive compounds in C. militaris. Here, we demonstrated that the distinct effects on the growth and synthesis of bioactive compounds employing different strategies of improving hypoxia adaption. The introduction of Vitreoscilla hemoglobin enhanced growth, biomass accumulation, and crude polysaccharides content of C. militaris. However, cordycepin production was decreased to 9-15% of the control group. Meanwhile, the yield of adenosine was increased significantly. Nonetheless, when the predicted bHLH transcription factor of sterol regulatory element binding proteins (SREBPs) was overexpressed in C. militaris to improve the hypoxia adaption of fungal cells, cordycepin content was significantly increased more than two-fold. These findings reveal the role of SREBPs on growth and bioactive compounds synthesis. And it also provides a scientific basis for rationally engineering strains and optimization strategies of air supply in cultivation and fermentation.
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Affiliation(s)
- Ying Wang
- National Engineering Research Centre of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Zhanshan Yang
- Department of Horticulture, College of Agriculture and Food Science, Zhejiang A&F University, Lin'an, China
| | - Dapeng Bao
- National Engineering Research Centre of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Bo Li
- National Engineering Research Centre of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Xin Yin
- National Engineering Research Centre of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Yingying Wu
- National Engineering Research Centre of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Hongyu Chen
- National Engineering Research Centre of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Guirong Tang
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Nanyi Li
- Department of Horticulture, College of Agriculture and Food Science, Zhejiang A&F University, Lin'an, China
| | - Gen Zou
- National Engineering Research Centre of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai, China
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