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Chen A, Morrison S, Gregson A, Le DP, Urquhart AS, Smith LJ, Aitken EAB, Gardiner DM. Fluorescently Tagged Verticillium dahliae to Understand the Infection Process on Cotton ( Gossypium hirsutum) and Weed Plant Species. Pathogens 2024; 13:442. [PMID: 38921740 PMCID: PMC11207081 DOI: 10.3390/pathogens13060442] [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: 04/10/2024] [Revised: 05/11/2024] [Accepted: 05/22/2024] [Indexed: 06/27/2024] Open
Abstract
Verticillium wilt is a soil-borne disease caused by distinct vegetative compatibility groups (VCG) of the fungus Verticillium dahliae. Defoliating (VCG 1A) and non-defoliating (VCG 2A) pathotypes of V. dahliae have contributed to yield losses of cotton production in Australia. To study the virulence and the infection process of V. dahliae on cotton, two isolates, one representing each VCG, have been transformed with fluorescent protein genes. The transformants maintained their ability to infect the host, and both strains were observed to move through the plant vasculature to induce wilt symptoms. Furthermore, virulence testing suggests that the cotton V. dahliae strains can endophytically colonise common weed plant species found in the Australian landscape, and that is contrasted by their ability to infect and colonise native tobacco plants. The fluorescently labelled strains of V. dahliae not only allowed us to gain a thorough understanding of the infection process but also provided a method to rapidly identify recovered isolates from host colonisation studies.
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Affiliation(s)
- Andrew Chen
- School of Agriculture and Food Sustainability, The University of Queensland, St. Lucia, QLD 4072, Australia; (S.M.); (A.G.)
| | - Sabrina Morrison
- School of Agriculture and Food Sustainability, The University of Queensland, St. Lucia, QLD 4072, Australia; (S.M.); (A.G.)
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Aphrika Gregson
- School of Agriculture and Food Sustainability, The University of Queensland, St. Lucia, QLD 4072, Australia; (S.M.); (A.G.)
- New South Wales Department of Primary Industries, Orange, NSW 2800, Australia
| | - Duy P. Le
- New South Wales Department of Primary Industries, Narrabri, NSW 2390, Australia;
| | - Andrew S. Urquhart
- Applied Biosciences, Macquarie University, Macquarie Park, NSW 2109, Australia
| | - Linda J. Smith
- EcoSciences Precinct, Department of Agriculture and Fisheries, Dutton Park, QLD 4102, Australia;
| | - Elizabeth A. B. Aitken
- School of Agriculture and Food Sustainability, The University of Queensland, St. Lucia, QLD 4072, Australia; (S.M.); (A.G.)
| | - Donald M. Gardiner
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St. Lucia, QLD 4072, Australia
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Liu Q, Li Y, Wu H, Zhang B, Liu C, Gao Y, Guo H, Zhao J. Hyphopodium-Specific Signaling Is Required for Plant Infection by Verticillium dahliae. J Fungi (Basel) 2023; 9:jof9040484. [PMID: 37108938 PMCID: PMC10143791 DOI: 10.3390/jof9040484] [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: 03/17/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
For successful colonization, fungal pathogens have evolved specialized infection structures to overcome the barriers present in host plants. The morphology of infection structures and pathogenic mechanisms are diverse according to host specificity. Verticillium dahliae, a soil-borne phytopathogenic fungus, generates hyphopodium with a penetration peg on cotton roots while developing appressoria, that are typically associated with leaf infection on lettuce and fiber flax roots. In this study, we isolated the pathogenic fungus, V. dahliae (VdaSm), from Verticillium wilt eggplants and generated a GFP-labeled isolate to explore the colonization process of VdaSm on eggplants. We found that the formation of hyphopodium with penetration peg is crucial for the initial colonization of VdaSm on eggplant roots, indicating that the colonization processes on eggplant and cotton share a similar feature. Furthermore, we demonstrated that the VdNoxB/VdPls1-dependent Ca2+ elevation activating VdCrz1 signaling is a common genetic pathway to regulate infection-related development in V. dahliae. Our results indicated that VdNoxB/VdPls1-dependent pathway may be a desirable target to develop effective fungicides, to protect crops from V. dahliae infection by interrupting the formation of specialized infection structures.
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Affiliation(s)
- Qingyan Liu
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Yingchao Li
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- School of Life Sciences, Hebei University, Baoding 071000, China
| | - Huawei Wu
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Bosen Zhang
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Chuanhui Liu
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Yi Gao
- Qilu Zhongke Academy of Modern Microbiology Technology, Jinan 250022, China
| | - Huishan Guo
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Jianhua Zhao
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100101, China
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Su X, Yan S, Zhao W, Liu H, Jiang Q, Wei Y, Guo H, Yin M, Shen J, Cheng H. Self-assembled thiophanate-methyl/star polycation complex prevents plant cell-wall penetration and fungal carbon utilization during cotton infection by Verticillium dahliae. Int J Biol Macromol 2023; 239:124354. [PMID: 37028625 DOI: 10.1016/j.ijbiomac.2023.124354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/23/2023] [Accepted: 04/03/2023] [Indexed: 04/08/2023]
Abstract
No effective fungicides are available for the management of Verticillium dahliae, which causes vascular wilt disease. In this study, a star polycation (SPc)-based nanodelivery system was used for the first time to develop a thiophanate-methyl (TM) nanoagent for the management of V. dahliae. SPc spontaneously assembled with TM through hydrogen bonding and Van der Waals forces to decrease the particle size of TM from 834 to 86 nm. Compared to TM alone, the SPc-loaded TM further reduced the colony diameter of V. dahliae to 1.12 and 0.64 cm, and the spore number to 1.13 × 108 and 0.72 × 108 cfu/mL at the concentrations of 3.77 and 4.71 mg/L, respectively. The TM nanoagents disturbed the expression of various crucial genes in V. dahliae, and contributed to preventing plant cell-wall degradation and carbon utilization by V. dahliae, which mainly impaired the infective interaction between pathogens and plants. TM nanoagents remarkably decreased the plant disease index and the fungal biomass in the root compared to TM alone, and its control efficacy was the best (61.20 %) among the various formulations tested in the field. Furthermore, SPc showed negligible acute toxicity toward cotton seeds. To the best of our knowledge, this study is the first to design a self-assembled nanofungicide that efficiently inhibits V. dahliae growth and protects cotton from the destructive Verticillium wilt.
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Affiliation(s)
- Xiaofeng Su
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China; Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, PR China
| | - Shuo Yan
- Department of Plant Biosecurity and MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing 100193, PR China.
| | - Weisong Zhao
- Institute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences, Baoding 071000, PR China
| | - Haiyang Liu
- Institute of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, PR China
| | - Qinhong Jiang
- Department of Plant Biosecurity and MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing 100193, PR China
| | - Ying Wei
- Department of Plant Biosecurity and MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing 100193, PR China
| | - Huiming Guo
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China; Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, PR China
| | - Meizhen Yin
- State Key Laboratory of Chemical Resource Engineering, Beijing Lab of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Jie Shen
- Department of Plant Biosecurity and MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing 100193, PR China.
| | - Hongmei Cheng
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China; Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, PR China.
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Zhang Y, Kang L, Gao J, Puri KD, Jia R, Zhang Z, Zhang J, Zhao J. Systemic Colonization of Potato Plants by Verticillium dahliae Leads to Infection of Tubers and Sprouting Buds. PLANT DISEASE 2023; 107:750-757. [PMID: 35939739 DOI: 10.1094/pdis-05-22-1029-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A green fluorescent protein (GFP)-tagged isolate of Verticillium dahliae was used to study its colonization in potato plants and tubers. Three-week-old potato plants of the highly susceptible cultivar 'Shepody' were inoculated with a conidial suspension of a GFP-tagged isolate of V. dahliae using a wound inoculation method. Colonization was studied using confocal microscopy combined with tissue sections. Conidia germinated and hyphae grew along the root hairs, elongation zones, and root caps between 24 and 96 h postinoculation (HPI). At 7 days postinoculation (DPI), the pathogen advanced to cortical tissues and grew into the root vascular bundles. At 8 weeks postinoculation (WPI), the stem epidermal cells, cortical tissues, vascular elements, and petioles were fully colonized by the mycelium of V. dahliae. At 11 WPI, the pathogen was detected in the stolon and progeny tubers, as confirmed by both GFP signals in tissues and reisolation of the pathogen on the semiselective NP-10 medium. Progeny potato tubers were harvested from the inoculated potato plants, and the GFP-signal was observed in the epidermal cells and vascular elements of sprouting buds that emerged from the harvested tubers. The infection rate of progeny tubers detected on semiselective NP-10 medium ranged from 34.55 to 55.56%, with an average of 45.31%. In conclusion, we report, for the first time, the entire progression of colonization by V. dahliae in potato plant tissues, progeny tubers, as well as of the sprouting buds that emerged from progeny tubers.
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Affiliation(s)
- Yuanyuan Zhang
- College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010018, China
- Key Laboratory of Biohazard Monitoring and Green Prevention and Control for Artificial Grassland, Ministry of Agriculture and Rural Affairs, Institute of Grassland Research of CAAS, Hohhot 010010, China
| | - Liru Kang
- College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010018, China
- Inner Mongolia Academy of Agricultural & Animal Husbandry Science, Hohhot 010031, China
| | - Jing Gao
- Inner Mongolia Academy of Agricultural & Animal Husbandry Science, Hohhot 010031, China
| | - Krishna D Puri
- Department of Plant Pathology, University of California, Davis, Salinas, CA 93905, U.S.A
| | - Ruifang Jia
- College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Zhiwei Zhang
- College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Jian Zhang
- College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Jun Zhao
- College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010018, China
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Wang D, Liu E, Liu H, Jin X, Niu C, Gao Y, Su X. A droplet digital PCR assay for detection and quantification of Verticillium nonalfalfae and V. albo-atrum. Front Cell Infect Microbiol 2023; 12:1110684. [PMID: 36710974 PMCID: PMC9874294 DOI: 10.3389/fcimb.2022.1110684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 12/20/2022] [Indexed: 01/13/2023] Open
Abstract
Verticillium nonalfalfae and V. albo-atrum are notorious pathogenic fungi that cause a destructive vascular disease called Verticillium wilt worldwide. Thus, timely and quantitative monitoring of fungal progression is highly desirable for early diagnosis and risk assessment. In this study, we developed a droplet digital polymerase chain reaction (ddPCR) assay to detect and quantify V. nonalfalfae and V. albo-atrum. The performance of this assay was validated in comparison with that of a quantitative real-time polymerase chain reaction (qPCR) assay. The standard curve analysis of the ddPCR assay showed good linearity. The ddPCR assay indicated similar detection sensitivity to that of qPCR on pure genomic DNA, while it enhanced the positive rate for low-abundance fungi, especially in alfalfa stems. Receiver operating characteristic analysis revealed that ddPCR provided superior diagnostic performance on field tissues compared to qPCR, and the area under curve values were 0.94 and 0.90 for alfalfa roots and stems, respectively. Additionally, the quantitative results of the two methods were highly concordant (roots: R2 = 0.91; stems: R2 = 0.76); however, the concentrations determined by ddPCR were generally higher than those determined by qPCR. This discrepancy was potentially caused by differing amplification efficiencies for qPCR between cultured and field samples. Furthermore, the ddPCR assays appreciably improved quantitative precision, as reflected by lower coefficients of variation. Overall, the ddPCR method enables sensitive detection and accurate quantification of V. nonalfalfae and V. albo-atrum, providing a valuable tool for evaluating disease progression and enacting effective disease control.
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Affiliation(s)
- Di Wang
- 1Center for Advanced Measurement Science, National Institute of Metrology, Beijing, China
| | - Enliang Liu
- 2Institute of Grain Crops, Xinjiang Academy of Agricultural Sciences, Urumqi, China
| | - Haiyang Liu
- 3Institute of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi, China
| | - Xi Jin
- 4Hebei Technology Innovation Center for Green Management of Soil-Borne Diseases, Baoding University, Hebei, China
| | - Chunyan Niu
- 1Center for Advanced Measurement Science, National Institute of Metrology, Beijing, China
| | - Yunhua Gao
- 1Center for Advanced Measurement Science, National Institute of Metrology, Beijing, China,*Correspondence: Yunhua Gao, ; Xiaofeng Su,
| | - Xiaofeng Su
- 5Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China,*Correspondence: Yunhua Gao, ; Xiaofeng Su,
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Pócsi I, Szigeti ZM, Emri T, Boczonádi I, Vereb G, Szöllősi J. Use of red, far-red, and near-infrared light in imaging of yeasts and filamentous fungi. Appl Microbiol Biotechnol 2022; 106:3895-3912. [PMID: 35599256 PMCID: PMC9200671 DOI: 10.1007/s00253-022-11967-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 05/02/2022] [Accepted: 05/07/2022] [Indexed: 11/30/2022]
Abstract
Abstract While phototoxicity can be a useful therapeutic modality not only for eliminating malignant cells but also in treating fungal infections, mycologists aiming to observe morphological changes or molecular events in fungi, especially when long observation periods or high light fluxes are warranted, encounter problems owed to altered regulatory pathways or even cell death caused by various photosensing mechanisms. Consequently, the ever expanding repertoire of visible fluorescent protein toolboxes and high-resolution microscopy methods designed to investigate fungi in vitro and in vivo need to comply with an additional requirement: to decrease the unwanted side effects of illumination. In addition to optimizing exposure, an obvious solution is red-shifted illumination, which, however, does not come without compromises. This review summarizes the interactions of fungi with light and the various molecular biology and technology approaches developed for exploring their functions on the molecular, cellular, and in vivo microscopic levels, and outlines the progress towards reducing phototoxicity through applying far-red and near-infrared light. Key points • Fungal biological processes alter upon illumination, also under the microscope • Red shifted fluorescent protein toolboxes decrease interference by illumination • Innovations like two-photon, lightsheet, and near IR microscopy reduce phototoxicity
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Affiliation(s)
- István Pócsi
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary.
| | - Zsuzsa M Szigeti
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
| | - Tamás Emri
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
| | - Imre Boczonádi
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
| | - György Vereb
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary.,MTA-DE Cell Biology and Signaling Research Group, Faculty of Medicine, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary.,Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
| | - János Szöllősi
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary.,MTA-DE Cell Biology and Signaling Research Group, Faculty of Medicine, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
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Starke J, Harting R, Maurus I, Leonard M, Bremenkamp R, Heimel K, Kronstad JW, Braus GH. Unfolded Protein Response and Scaffold Independent Pheromone MAP Kinase Signaling Control Verticillium dahliae Growth, Development, and Plant Pathogenesis. J Fungi (Basel) 2021; 7:jof7040305. [PMID: 33921172 PMCID: PMC8071499 DOI: 10.3390/jof7040305] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/12/2021] [Accepted: 04/12/2021] [Indexed: 12/13/2022] Open
Abstract
Differentiation, growth, and virulence of the vascular plant pathogen Verticillium dahliae depend on a network of interconnected cellular signaling cascades. The transcription factor Hac1 of the endoplasmic reticulum-associated unfolded protein response (UPR) is required for initial root colonization, fungal growth, and vascular propagation by conidiation. Hac1 is essential for the formation of microsclerotia as long-time survival resting structures in the field. Single endoplasmic reticulum-associated enzymes for linoleic acid production as precursors for oxylipin signal molecules support fungal growth but not pathogenicity. Microsclerotia development, growth, and virulence further require the pheromone response mitogen-activated protein kinase (MAPK) pathway, but without the Ham5 scaffold function. The MAPK phosphatase Rok1 limits resting structure development of V.dahliae, but promotes growth, conidiation, and virulence. The interplay between UPR and MAPK signaling cascades includes several potential targets for fungal growth control for supporting disease management of the vascular pathogen V.dahliae.
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Affiliation(s)
- Jessica Starke
- Department of Molecular Microbiology and Genetics, Institute of Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), University of Göttingen, 37077 Göttingen, Germany; (J.S.); (R.H.); (I.M.); (M.L.); (R.B.); (K.H.)
| | - Rebekka Harting
- Department of Molecular Microbiology and Genetics, Institute of Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), University of Göttingen, 37077 Göttingen, Germany; (J.S.); (R.H.); (I.M.); (M.L.); (R.B.); (K.H.)
| | - Isabel Maurus
- Department of Molecular Microbiology and Genetics, Institute of Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), University of Göttingen, 37077 Göttingen, Germany; (J.S.); (R.H.); (I.M.); (M.L.); (R.B.); (K.H.)
| | - Miriam Leonard
- Department of Molecular Microbiology and Genetics, Institute of Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), University of Göttingen, 37077 Göttingen, Germany; (J.S.); (R.H.); (I.M.); (M.L.); (R.B.); (K.H.)
| | - Rica Bremenkamp
- Department of Molecular Microbiology and Genetics, Institute of Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), University of Göttingen, 37077 Göttingen, Germany; (J.S.); (R.H.); (I.M.); (M.L.); (R.B.); (K.H.)
| | - Kai Heimel
- Department of Molecular Microbiology and Genetics, Institute of Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), University of Göttingen, 37077 Göttingen, Germany; (J.S.); (R.H.); (I.M.); (M.L.); (R.B.); (K.H.)
| | - James W. Kronstad
- Michael Smith Laboratories, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada;
| | - Gerhard H. Braus
- Department of Molecular Microbiology and Genetics, Institute of Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), University of Göttingen, 37077 Göttingen, Germany; (J.S.); (R.H.); (I.M.); (M.L.); (R.B.); (K.H.)
- Correspondence: ; Tel.: +49-(0)551-39-33771
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