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Franken ACW, Lechner BE, Werner ER, Haas H, Lokman BC, Ram AFJ, van den Hondel CAMJJ, de Weert S, Punt PJ. Genome mining and functional genomics for siderophore production in Aspergillus niger. Brief Funct Genomics 2014; 13:482-92. [DOI: 10.1093/bfgp/elu026] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Te Biesebeke R, Boussier A, van Biezen N, van den Hondel CAMJJ, Punt PJ. Identification of secreted proteins of Aspergillus oryzae associated with growth on solid cereal substrates. J Biotechnol 2006; 121:482-5. [PMID: 16226332 DOI: 10.1016/j.jbiotec.2005.08.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2005] [Revised: 08/08/2005] [Accepted: 08/19/2005] [Indexed: 11/30/2022]
Abstract
Filamentous growth of Aspergillus oryzae on solid cereal substrates involves secretion of substrate converting enzymes and a solid substrate specific polarised hyphal growth phenotype. To identify proteins produced under these specific conditions, the extracts of A. oryzae grown on wheat-based media were analysed using N-terminal sequence analysis. In a submerged wheat-based growth medium of A. oryzae, besides alpha-amylase, also an arabinosidase and xylanase were abundantly produced. In the extracts of A. oryzae grown on wheat-based solid substrate besides alpha-amylase and chitinase, two new proteins of 16 and 27 kDa were identified. These hypothetical proteins showed only close homologies to filamentous fungal proteins.
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Affiliation(s)
- R Te Biesebeke
- Wageningen Centre for Food Sciences (WCFS), P.O. Box 557, 6700 AN, Wageningen, The Netherlands.
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Michielse CB, Arentshorst M, Ram AFJ, van den Hondel CAMJJ. Agrobacterium-mediated transformation leads to improved gene replacement efficiency in Aspergillus awamori. Fungal Genet Biol 2005; 42:9-19. [PMID: 15588992 DOI: 10.1016/j.fgb.2004.06.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2004] [Accepted: 06/11/2004] [Indexed: 11/19/2022]
Abstract
In this study, the efficiency of gene replacement in Aspergillus awamori between Agrobacterium-mediated transformation and CaCl(2)/PEG-mediated transformation was compared. For the genes, pyrG and gfaA, it was found that the homologous recombination frequencies obtained by Agrobacterium-mediated transformation were 3- to 6-fold higher than the frequencies obtained with CaCl(2)/PEG protoplast transformation. For the pyrG gene, it was found that Agrobacterium-mediated transformation allowed an efficient homologous recombination with shorter DNA flanks than CaCl(2)/PEG protoplast transformation. Finally, the addition of the dominant amdS marker as a second selection marker to the gene replacement cassette led to a further 2-fold enrichment in transformants with gene replacement events, resulting in a gene replacement frequency of 55%. Based on the data it can be concluded that Agrobacterium-mediated transformation is an efficient tool for gene replacement and that the amdS gene can be successfully used as a second selection marker to select transformants with putative gene replacement.
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Affiliation(s)
- C B Michielse
- Institute of Biology, Clusius Laboratory, Leiden University, Wassenaarseweg 64, 2333 AL, Leiden, The Netherlands
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te Biesebeke R, Record E, van Biezen N, Heerikhuisen M, Franken A, Punt PJ, van den Hondel CAMJJ. Branching mutants of Aspergillus oryzae with improved amylase and protease production on solid substrates. Appl Microbiol Biotechnol 2005; 69:44-50. [PMID: 15909137 DOI: 10.1007/s00253-005-1968-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2005] [Revised: 03/18/2005] [Accepted: 03/20/2005] [Indexed: 11/30/2022]
Abstract
To study the relation between the number of hyphal tips and protein secretion during growth on a solid substrate, we have constructed two mutant strains of Aspergillus oryzae with increased hyphal branching. We have analysed hydrolytic enzyme activities during growth on wheat kernels (WK) of A. oryzae strains carrying the disrupted allele of the pclA gene encoding a secretion pathway specific (KEX2-like) endo-protease and the disrupted allele of the pg/pi-tp gene encoding a phosphatidylglycerol/phosphatidylinositol transfer protein. The biomass levels produced by the pclA and pg/pi-tp disrupted strains on wheat-based solid media were similar as found for the wild-type strain. However, the pclA disrupted strain showed much more compact colony morphology than the other two strains. Sporulation of the pclA and pg/pi-tp disrupted strains occurred, respectively, 2 days and 1 day later, compared to the wild type during fermentation on ground WK. During surface growth, microscopic analysis revealed that the hyphal growth unit length (L (hgu)) of the pclA and pg/pi-tp disrupted strains was, on average, 50 and 74% of that of the wild-type strain. This implies that in both mutant strains, a higher branching frequency occurs than in the wild-type strain. Compared to the wild-type strain, the pclA and pg/pi-tp disrupted strains produced at least 50% more amylase, at least 100% more glucoamylase and at least 90% more protease activity levels after growth on WK. These results support the hypothesis that branching mutants with an increased branching frequency can improve the solid state fermentation process.
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Affiliation(s)
- R te Biesebeke
- Wageningen Centre for Food Sciences, P.O. Box 557, 6700 AN, Wageningen, The Netherlands.
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te Biesebeke R, van Biezen N, de Vos WM, van den Hondel CAMJJ, Punt PJ. Different control mechanisms regulate glucoamylase and protease gene transcription in Aspergillus oryzae in solid-state and submerged fermentation. Appl Microbiol Biotechnol 2004; 67:75-82. [PMID: 15800731 DOI: 10.1007/s00253-004-1807-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2004] [Revised: 10/04/2004] [Accepted: 10/19/2004] [Indexed: 11/28/2022]
Abstract
Solid-state fermentation (SSF) with Aspergillus oryzae results in high levels of secreted protein. However, control mechanisms of gene expression in SSF have been only poorly studied. In this study we show that both glucoamylase (glaB) and protease (alpA, nptB) genes are highly expressed during surface cultivation on wheat-based solid medium, and even higher during cultivation on wheat kernels. In wheat-based liquid medium, low levels of gene expression are observed. Typical SSF cultivation conditions, such as low water activity and the formation of aerial hyphae, did not contribute to the high-level gene expression on wheat-based solid medium. Analysis of wheat-based solid and liquid cultivations showed differences in carbon and nitrogen utilisation and external pH. The results presented show that the difference in regulation of transcription of the alpA and nptB genes in wheat-based liquid and solid medium could be pH dependent, involving a pH-dependent transcription regulator. The results obtained suggest that the difference in regulation of transcription of the glaB gene in wheat-based liquid and solid medium is caused by a difference in carbohydrate degradation and consumption under the different culture conditions.
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Affiliation(s)
- R te Biesebeke
- TNO Nutrition and Food Research Institute, Utrechtseweg 48, 3700 AJ Zeist, The Netherlands.
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Nelson G, Kozlova-Zwinderman O, Collis AJ, Knight MR, Fincham JRS, Stanger CP, Renwick A, Hessing JGM, Punt PJ, van den Hondel CAMJJ, Read ND. Calcium measurement in living filamentous fungi expressing codon-optimized aequorin. Mol Microbiol 2004; 52:1437-50. [PMID: 15165245 DOI: 10.1111/j.1365-2958.2004.04066.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Calcium signalling is little understood in filamentous fungi largely because easy and routine methods for calcium measurement in living hyphae have previously been unavailable. We have developed the recombinant aequorin method for this purpose. High levels of aequorin expression were obtained in Neurospora crassa, Aspergillus niger and Aspergillus awamori by codon optimization of the aequorin gene. Three external stimuli (mechanical perturbation, hypo-osmotic shock and high external calcium) were found transiently to increase [Ca(2+)](c). Each of the calcium signatures associated with these physico-chemical treatments was unique, suggesting the involvement of three distinct calcium-mediated signal transduction pathways. The fungal calcium channel blocker KP4 inhibited the [Ca(2+)](c) responses to hypo-osmotic shock and high external calcium, but not to mechanical perturbation. The divalent cation chelator BAPTA inhibited [Ca(2+)](c) responses to mechanical perturbation and hypo-osmotic shock. The calcium agonists A23187 and cyclopiazonic acid increased [Ca(2+)](c) levels.
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Affiliation(s)
- G Nelson
- Fungal Cell Biology Group, Institute of Cell and Molecular Biology, University of Edinburgh, Rutherford Building, Edinburgh EH9 3JH, UK
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Michielse CB, Salim K, Ragas P, Ram AFJ, Kudla B, Jarry B, Punt PJ, van den Hondel CAMJJ. Development of a system for integrative and stable transformation of the zygomycete Rhizopus oryzae by Agrobacterium-mediated DNA transfer. Mol Genet Genomics 2004. [DOI: 10.1007/s00438-004-1020-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Michielse CB, Ram AFJ, Hooykaas PJJ, Hondel CAMJJVD. Role of bacterial virulence proteins in Agrobacterium-mediated transformation of Aspergillus awamori. Fungal Genet Biol 2004; 41:571-8. [PMID: 15050546 DOI: 10.1016/j.fgb.2004.01.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2003] [Accepted: 01/08/2004] [Indexed: 11/25/2022]
Abstract
The Agrobacterium-mediated transformation of Aspergillus awamori was optimized using defined co-cultivation conditions, which resulted in a reproducible and efficient transformation system. Optimal co-cultivation conditions were used to study the role of Agrobacterium tumefaciens virulence proteins in T-DNA transfer. This study revealed that inactivation of either of the regulatory proteins (VirA, VirG), any of the transport pore proteins (VirB), proteins involved in generation of the T-strand (VirD, VirC) or T-strand protection and targeting (VirE2) abolishes or severely reduces the formation of transformants. The results indicate that the Agrobacterium-mediated transformation of A. awamori requires an intact T-DNA machinery for efficient transformation; however, the plant host range factors, like VirE3, VirH, and VirF, are not important.
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Affiliation(s)
- C B Michielse
- Institute of Biology, Clusius Laboratory, Leiden University, Wassenaarseweg 64, 2333 AL, Leiden, The Netherlands.
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Michielse CB, Salim K, Ragas P, Ram AFJ, Kudla B, Jarry B, Punt PJ, van den Hondel CAMJJ. Development of a system for integrative and stable transformation of the zygomycete Rhizopus oryzae by Agrobacterium-mediated DNA transfer. Mol Genet Genomics 2004; 271:499-510. [PMID: 15067540 DOI: 10.1007/s00438-004-1003-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2003] [Accepted: 02/27/2004] [Indexed: 10/26/2022]
Abstract
Two transformation systems, based on the use of CaCl(2)/PEG and Agrobacterium tumefaciens, respectively, were developed for the zygomycete Rhizopus oryzae. Irrespective of the selection marker used, a pyr4 marker derived from R. niveus or a dominant amdS(+) marker from Aspergillus nidulans, and irrespective of the configuration of the transforming DNA (linear or circular), the transformants obtained with the CaCl(2)/PEG transformation method were found to carry multiple copies of tandemly linked vector molecules, which failed to integrate into the genomic DNA. Furthermore, these transformants displayed low mitotic stability. In contrast, transformants obtained by Agrobacterium-mediated transformation were mitotically stable, even under non-selective conditions. Detailed analysis of these transformants revealed that the transforming DNA had integrated into the genome of R. oryzae at a single locus in independently obtained transformants. In addition, truncation of the transforming DNA was observed, resulting in the integration of the R. niveus pyr4 marker gene, but not the second gene located on the transferred DNA. Modification of the transforming DNA, resulting in partial resistance to restriction enzyme digestion, was observed in transformants obtained with the CaCl(2)/PEG transformation method, suggesting that a specific genome defence mechanism may exist in R. oryzae. It is likely that the unique mechanism used by A. tumefaciens to deliver its transferred DNA to its hosts facilitates bypass of the host defence mechanisms, thus allowing the DNA to integrate into the chromosomal genome.
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Affiliation(s)
- C B Michielse
- Fungal Genetics Group, Clusius Laboratory, Institute of Biology, Leiden University, Wassenaarseweg 64, 2333 AL, Leiden, The Netherlands.
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Michielse CB, Ram AFJ, van den Hondel CAMJJ. The Aspergillus nidulans amdS gene as a marker for the identification of multicopy T-DNA integration events in Agrobacterium-mediated transformation of Aspergillus awamori. Curr Genet 2004; 45:399-403. [PMID: 15045526 DOI: 10.1007/s00294-004-0500-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2004] [Revised: 03/02/2004] [Accepted: 03/08/2004] [Indexed: 10/26/2022]
Abstract
The Aspergillus nidulans amdS selection marker was used for the identification of multicopy T-DNA insertions in Agrobacterium-mediated transformation of Asp. awamori. The selection of transformants on agar plates containing acetamide as sole nitrogen source and hygromycin resulted in a six-fold decrease in the transformation frequency, compared with the transformation frequency obtained after hygromycin selection alone. However, it was found that 47% of the transformants obtained after hygromycin and acetamide double selection contained multiple T-DNA integrations. Furthermore, it was found that the multicopy transformants could easily be identified based on their growth rate on agar plates containing acetamide medium. Based on these data, it can be concluded that the amdS marker can also be used as a selection marker in Agrobacterium-mediated transformation of Asp. awamori and that it is a very useful marker to identify those transformants containing multiple T-DNA integrations.
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Affiliation(s)
- C B Michielse
- Institute of Biology, Clusius Laboratory, Leiden University, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands.
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Punt PJ, Drint-Kuijvenhoven A, Lokman BC, Spencer JA, Jeenes D, Archer DA, van den Hondel CAMJJ. The role of the Aspergillus niger furin-type protease gene in processing of fungal proproteins and fusion proteins. J Biotechnol 2003; 106:23-32. [PMID: 14636707 DOI: 10.1016/j.jbiotec.2003.09.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have characterized growth and protein processing characteristics of Aspergillus niger strains carrying a disrupted allele of the previously cloned and characterized kexB gene [Appl. Environ. Microbiol. 66 (2000) 363] encoding a furin-type endoprotease. Deletion of the single-copy gene confirms it to be non-essential but disruptant strains exhibit a morphologically distinct phenotype characterized by hyperbranching. Processing of homologous pro-proteins and fusion proteins comprised of a heterologous protein fused down-stream of glucoamylase and separated at the fusion junction by an endoproteolytic cleavage site was compared in wildtype and mutant strains of A. niger. We show that maturation of the native glucoamylase requires KexB, whereas maturation of aspergillopepsin does not. The processing of fusion proteins carrying Lys-Arg requires KexB, although alternative endoproteases are capable of cleaving protein fusions at sites adjacent to Lys-Arg.
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Affiliation(s)
- P J Punt
- TNO Nutrition and Food Research, Department of Applied Microbiology and Gene Technology, 3700 AJ Zeist, The Netherlands.
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Sigoillot C, Record E, Belle V, Robert JL, Levasseur A, Punt PJ, van den Hondel CAMJJ, Fournel A, Sigoillot JC, Asther M. Natural and recombinant fungal laccases for paper pulp bleaching. Appl Microbiol Biotechnol 2003; 64:346-52. [PMID: 14600793 DOI: 10.1007/s00253-003-1468-3] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2003] [Revised: 09/17/2003] [Accepted: 09/19/2003] [Indexed: 10/26/2022]
Abstract
Three laccases, a natural form and two recombinant forms obtained from two different expression hosts, were characterized and compared for paper pulp bleaching. Laccase from Pycnoporus cinnabarinus, a well known lignolytic fungus, was selected as a reference for this study. The corresponding recombinant laccases were produced in Aspergillus oryzae and A. niger hosts using the lacI gene from P. cinnabarinus to develop a production process without using the expensive laccase inducers required by the native source. In flasks, production of recombinant enzymes by Aspergilli strains gave yields close to 80 mg l(-1). Each protein was purified to homogeneity and characterized, demonstrating that the three hosts produced proteins with similar physico-chemical properties, including electron paramagnetic resonance spectra and N-terminal sequences. However, the recombinant laccases have higher Michaelian (Km) constants, suggesting a decrease in substrate/enzyme affinity in comparison with the natural enzyme. Moreover, the natural laccase exhibited a higher redox potential (around 810 mV), compared with A. niger (760 mV) and A. oryzae (735 mV). Treatment of wheat straw Kraft pulp using laccases expressed in P. cinnabarinus or A. niger with 1-hydroxybenzotriazole as redox mediator achieved a delignification close to 75%, whereas the recombinant laccase from A. oryzae was not able to delignify pulp. These results were confirmed by thioacidolysis. Kinetic and redox potential data and pulp bleaching results were consistent, suggesting that the three enzymes are different and each fungal strain introduces differences during protein processing (folding and/or glycosylation).
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Affiliation(s)
- C Sigoillot
- UMR 1163 INRA/Université de Provence de Biotechnologie des Champignons Filamenteux, IFR 86 BAIM, Universités de Provence et de la Méditerranée, ESIL, 163 avenue de Luminy, C.P. 925, 13288 Marseille 09, France.
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Record E, Asther M, Sigoillot C, Pagès S, Punt PJ, Delattre M, Haon M, van den Hondel CAMJJ, Sigoillot JC, Lesage-Meessen L, Asther M. Overproduction of the Aspergillus niger feruloyl esterase for pulp bleaching application. Appl Microbiol Biotechnol 2003; 62:349-55. [PMID: 12743752 DOI: 10.1007/s00253-003-1325-4] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2002] [Revised: 03/13/2003] [Accepted: 03/13/2003] [Indexed: 11/27/2022]
Abstract
A well-known industrial fungus for enzyme production, Aspergillus niger, was selected to produce the feruloyl esterase FAEA by homologous overexpression for pulp bleaching application. The gpd gene promoter was used to drive FAEA expression. Changing the nature and concentration of the carbon source nature (maltose to glucose; from 2.5 to 60 g l(-1)), improved FAEA activity 24.5-fold and a yield of 1 g l(-1) of the corresponding protein in the culture medium was achieved. The secreted FAEA was purified 3.5-fold to homogeneity in a two-step purification procedure with a recovery of 69%. The overproduced protein was characterised and presented properties in good agreement with those of native FAEA. The recombinant FAEA was tested for wheat straw pulp bleaching, with or without a laccase mediator system and xylanase. Best results were obtained using a bi-sequential process with a sequence including xylanase, FAEA and laccase, and yielded very efficient delignification--close to 75%--and a kappa number of 3.9. This is the first report on the potential application of recombinant FAEA in the pulp and paper sector.
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Affiliation(s)
- E Record
- UMR 1163 INRA/Université de Provence de Biotechnologie des Champignons Filamenteux, IFR-BAIM, Universités de Provence et de la Méditerranée, ESIL, 163 avenue de Luminy, Case Postale 925, 13288, Marseille Cedex 09, France.
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van den Hondel CAMJJ, Goosen T. Guest editorial. Antonie van Leeuwenhoek 1994. [DOI: 10.1007/bf00871941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Oliver RP, Roberts IN, Harling R, Kenyon L, Punt PJ, Dingemanse MA, van den Hondel CAMJJ. Transformation of Fulvia fulva, a fungal pathogen of tomato, to hygromycin B resistance. Curr Genet 1987. [DOI: 10.1007/bf00436885] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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