Biocontrol of Root Diseases by Pseudomonas fluorescens CHA0: Current Concepts and Experimental Approaches

Molecular Ecology of Rhizosphere Microorganisms: Biotechnology and the Release of GMOs

Volumn , Issue , 2007, Pages 67-89

  Voisard, Christophe ^a,b   Bull, Carolee T ^a,b   Keel, Christoph ^a   Laville, Jacques ^a   Maurhofer, Monika ^a   Schnider, Ursula ^a,b   Défago, Geneviève ^a   Haas, Dieter ^a,c  

^a ETH ZURICH   (Switzerland)

^b Swiss Meteorologi cal Institute   (Switzerland)

^c UNIVERSITY OF LAUSANNE   (Switzerland)

Author keywords

Biocontrol; Genome; Hypothesis; KHL; Pathogens

Indexed keywords

EID: 84950280872     PISSN: None     EISSN: None     Source Type: Book    
DOI: 10.1002/9783527615810.ch6     Document Type: Chapter

References (125)

1. Baker, K.F. Evolving concepts of biological control of plant pathogens. Annu. Rev. Phytopathol. 25 (1987) 67-85.
2. Defago, G., and D. Haas. Pseudomonads as antagonists of soilborne plant pathogens: modes of action and genetic analysis. Soil Biochem. 6 (1990) 249-291.
3. Kloepper, J.W., R. Lifshitz, and M.N. Schroth. Pseudomonas inoculants to benefit plant production. ISI Atlas of Science: Animal and Plant Sciences: (1988) 60-64.
4. Lugtenberg, B.J.J., L.A. de Weger, and J.W. Bennett. Microbial stimulation of plant growth and protection from disease. Current Opinion in Biotechnology 2 (1991) 457-464.
5. O'Sullivan, D.J., and F. O'Gara. Traits of fluorescent Pseudomonas spp. involved in suppression of plant root pathogens. Microbiol. Rev. 56 (1992) 662-676.
6. Schippers, B., A.W. Bakker, and P.A.H.M. Bakker. Interactions of deleterious and beneficial rhizosphere microorganisms and the effect of cropping practices. Annu. Rev. Phytopathol. 25 (1987) 339-358.
7. Weller, D.M. Biological control of soilborne plant pathogens in the rhizosphere with bacteria. Annu. Rev. Phytopathol. 26 (1988) 379-407.
8. Zablotowicz, R.M., C. M. Press, N. Lyng, G.L. Brown, and J.W. Kloepper. Compatibility of plant growth promoting rhizobacterial strains with agrichemicals applied to seed. Can. J. Microbiol. 38 (1992) 45-50.
9. Stutz, E., G. Defago, and H. Kern. Naturally occurring fluorescent pseudomonads involved in suppression of black root rot of tobacco. Phytopathology 76 (1986) 181-185.
10. Keel, C, C. Voisard, C.H. Berling, G. Kahr, and G. Defago. Iron sufficiency, a prerequisite for suppression of tobacco black root rot by Pseudomonas fluorescens strain CHA0 under gnotobiotic conditions. Phytopathology 79 (1989) 584-589.
11. Defago, G., C.H. Berling, U. Burger, D. Haas, G. Kahr, C. Keel, C. Voisard, P. Wirthner, and B. Wiithrich. Suppression of black root rot of tobacco and other root diseases by strains of Pseudomonas fluorescens: potential applications and mechanisms. In: D. Hornby, R.J. Cook, Y. Henis, W.H. Ko, A.D. Rovira, B. Schippers and P.R. Scott (eds.), Biological control of soil-borne plant pathogens. CAB International, 1990, p. 93-108.
12. Keel, C, P. Wirthner, T. Oberhansli, C. Voisard, U Burger, D. Haas, and G. Défago. Pseudomonads as antagonists of plant pathogens in the rhizosphere: role of the antibiotic 2,4-diacetylphloroglucinol in the suppression of black root rot of tobacco. Symbiosis 9 (1990) 327-341.
13. Keel, C, U Schnider, M. Maurhofer, C. Voisard, J. Laville, U. Burger, P. Wirthner, D. Haas, and G. Defago. Suppression of root diseases by Pseudomonas fluorescens CHA0: importance of the bacterial secondary metabolite 2,4-diacetylphloroglucinol. Mol. Plant-Microbe Inter. 5 (1992) 4-13.
14. Maurhofer, M., C. Keel, U. Schnider, C. Voisard, D. Haas, and G. Defago. Does enhanced antibiotic production in Pseudomonas fluorescens strain CHA0 improve its disesase suppressive capacity? In: C. Keel, B. Roller, and G. Difago (eds.), Plant growth-promoting rhizobacteria - Progress and prospects. IOBC/WPRS Bulletin 14. 1991, p. 201-202.
15. Maurhofer, M., C. Keel, U. Schnider, C. Voisard, D. Haas, and G. Defago. Influence of enhanced antibiotic production in Pseudomonas fluorescens strain CHAO on its disease suppressive capacity. Phytopathology 82 (1992) 190-195.
16. Fravel, D.R. Role of antibiosis in the biocontrol of plant diseases. Annu. Rev. Phytopathol. 26 (1988) 75-91.
17. Gutterson, N. Microbial fungicides: recent approaches to elucidating mechanisms. Crit. Rev. Biotechnol. 10 (1990) 69-91.
18. Handelsman, J., and J.L. Parke. Mechanisms in biocontrol of soilborne plant pathogens. In: T. Kosuge and E. Nester (eds.), Plant-microbe interactions, vol. III, McGraw Hill, New York, 1989, p. 27-61.
19. Leong, J. Siderophores: their biochemistry and possible role in the biocontrol of plant pathogens. Annu. Rev. Phytopathol. 24 (1986) 187-209.
20. Loper, J.E., and J.S. Buyer. Siderophores in microbial interactions on plant surfaces. Mol. Plant-Microbe Inter. 4 (1991) 5-13.
21. Schroth, M.N., and J.G. Hancock. Disease-suppressive soil and root-colonizing bacteria. Science 216 (1982) 1376-1381.
22. Ahl, P., C. Voisard, and G. Defago. Iron bound-siderophores, cyanide, and antibiotics involved in suppression of Thielaviopsis basicola by a Pseudomonas fluorescens strain. J. Phytopathol. 116 (1986) 121-134.
23. Meyer, J.M., P. Azelvandre, and C. Georges. Iron metabolism in Pseudomonas: salicylic acid, a siderophore of Pseudomonas fluorescens CHAO. BioFactors 4 (1992) 23-27.
24. Visca, P., G. Colotti, L. Serino, D. Verzili, N. Orsi, and E. Chiancone. Metal regulation of siderophore synthesis in Pseudomonas aeruginosa and functional effects of siderophore-metal complexes. Appl. Environ. Microbiol. 58 (1992) 2886-2893.
25. Ankenbauer, R.G., and CD. Cox. Isolation and characterization of Pseudomonas aeruginosa mutants requiring salicylic acid for pyochelin biosynthesis. J. Bacteriol. 170 (1988) 5364-5367.
26. Ratledge, C, L.P. Macham, K.A. Brown, and B.J. Marshall. Iron transport in Mycobacterium smegmatis: A restricted role for salicylic acid in the extracellular environment. Biochim. Biophys. Acta 372 (1974) 39-51.
27. Enyedi, A.J., N. Yalpani, P. Silverman, and I. Raskin. Signal molecules in systemic plant resistance to pathogens and pests. Cell 70 (1992) 879-886.
28. Raskin, I. Salicylate, a new plant hormone. Plant Physiol. 99 (1992) 799-803.
29. Raskin, I. Role of salicylic acid in plants. Annu. Rev. Plant Mol. Biol. 43 (1992) 439-463.
30. Cuppels, D.A., R.D. Stipanovic, A. Stoessl, and J.B. Stothers. The constitution and properties of a pyochelin-zinc complex. Can. J. Chem. 65 (1987) 2126-2130.
31. Keel, C, and G. Defago. The fluorescent siderophore of Pseudomonas fluorescens strain CHAO has no effect on the suppression of root diseases of wheat. In: C. Keel, B. Koller, and G. Difago (eds.), Plant growth-promoting rhizobacteria - Progress and prospects. IOBC/WPRS Bulletin 14.1991, p. 136-142.
32. Haas, D., C. Keel, J. Laville, M. Maurhofer, T. Oberhansli, U. Schnider, C. Voisard, B. Wuthrich, and G. Defago. Secondary metabolites of Pseudomonas fluorescens strain CHAO involved in the suppression of root diseases. In: H. Hennecke and D.P.S. Verma (eds.), Advances in molecular genetics of plant-microbe interactions, Vol. I. Kluwer Academic Publishers, Dordrecht, 1991, p. 450-456.
33. Voisard, C., C. Keel, D. Haas, and G. Difago. Cyanide production by Pseudomonas fluorescens helps suppress black root rot of tobacco under gnotobiotic conditions. EMBO J. 8 (1989) 351-358.
34. Oberhansli, T., G. Defago, and D. Haas. Indole-3-acetic acid (IAA) synthesis in the biocontrol strain CHAO of Pseudomonas fluorescens: role of tryptophan side chain oxidase. J. Gen. Microbiol. 137 (1991) 2273-2279.
35. Bainton, N.J., B.W. Bycroft, S.R. Chhabra, P. Stead, L. Gledhill, P.J. Hill, C.E.D. Rees, M.K. Winson, G.P.C. Salmond, C.S.A.B. Stewart, and P. Williams. A general role for the lux autoinducer in bacterial cell signalling: control of antibiotic biosynthesis in Erwinia. Gene 116 (1992) 87-91.
36. Way, J.L., P. Leung, E. Cannon, R. Morgan, C. Tamulinas, J.L. Way, L. Baxter, A. Nagi, and C. Chui. The mechanism of cyanide intoxication and its antagonism. In: D. Evered and S. Harnett (eds.), Cyanide compounds in biology. J. Wiley, Chichester, 1988, p. 232-243.
37. Akimenko, V.K., S.M. Trutko, A.G. Medentsev, and V.P. Korobov. Distribution of cyanide-resistant respiration among yeasts and bacteria and its relation to oversynthesis of metabolites. Arch. Microbiol. 136 (1983) 234-241.
38. Matsushita, K., M. Yamada, E. Shinagawa, O. Adachi, and M. Ameyama. Membrane-bound respiratory chain of Pseudomonas aeruginosa grown aerobically. A KCN-insensitive alternate oxidase chain and its energetics. J. Biochem. 93 (1983) 1137-1144.
39. Zannoni, D. The respiratory chains of pathogenic pseudomonads. Biochim. Biophys. Acta 975 (1989) 299-316.
40. Barbieri, P., T. Zanelli, E. Galli, and G. Zanetti. Wheat inoculation with Azospirillum brasilense Sp6 and some mutants altered in nitrogen fixation and indole-3-acetic acid production. FEMS Microbiol. Lett. 36 (1986) 87-90.
41. Crozier, A., P. Arruda, J.M. Jasmin, A.M. Monteiro, and G. Sandberg. Analysis of indole-3-acetic acid and related indoles in culture medium from Azospirillum lipoferum and Azospirillum brasilense. Appl. Environ. Microbiol. 54 (1988) 2833-2837.
42. Defago, G. 2,4-Diacetylphloroglucinol, a promising compound in biocontrol. Plant Pathology (1993) (in press).
43. Dutrecq, A., P. Debras, J. Stevaux, and M. Marlier. Activity of 2,4-diacetylphloroglucinol isolated from a strain of Pseudomonas fluorescens to Gaeumannomyces graminis var. tritici. In: A.B.R. Beemster, G.J. Bollen, M. Gerlagh, M.A. Ruissen, B. Schippers, and A. Tempel (ed.), Biotic interactions and soil-borne diseases. Elsevier Science Publishers, Amsterdam 1991, p. 252-257.
44. Homma, Y., Z. Sato, F. Hirayama, K. Konno, H. Shirahama, and T. Suzui. Production of antibiotics by Pseudomonas cepacia as an agent for biological control of soilborne plant pathogens. Soil Biol. Biochem. 21 (1989) 723-728.
45. Howell, C.R., and R.D. Stipanovic. Control of Rhizoctonia solani on cotton seedlings with Pseudomonas fluorescens and with an antibiotic produced by the bacterium. Phytopathology 69 (1979) 480-482.
46. Howell, C.R., and R.D. Stipanovic. Suppression of Pythium ultimum-iaduced damping-off of cotton seedlings by Pseudomonas fluorescens and its antibiotic, pyoluteorin. Phytopathology 70 (1980) 712-715.
47. Kiprianova, E.A., and Smirnov, V.V. Pseudomonas fluorescens, producer of antibiotic compounds. Antibiotiki 26 (1981) 135-143.
48. Ohmori, T, S. Hagiwara, A. Ueda, Y. Minoda, and K. Yamada. Production of pyoluteorin and its derivatives from n-paraffin by Pseudomonas aeruginosa S10B2. Agric. Biol. Chem. 42 (1978) 2031-2036.
49. Dunlap, P.V., and A. Kuo. Cell density-dependent modulation of the Vibrio fischeri luminescence system in the absence of autoinducer and LuxR protein. J. Bacteriol. 174 (1992) 2440-2448.
50. Meighen, E.A. Molecular biology of bacterial bioluminescence. Microbiol. Rev. 55 (1991) 123-142.
51. Stewart, G.S.A.B., and P. Williams. Lux genes and the applications of bacterial bioluminescence. J. Gen. Microbiol. 138 (1992) 1289-1300.
52. Williams, P., N.J. Bainton, S. Swift, S.R. Chhabra, M.K. Winson, G.S.A.B. Stewart, G.P.C. Salmond, and B.W. Bycroft. Small molecule-mediated density-dependent control of gene expression in pro-karyotes: bioluminescence and the biosynthesis of carbapenem antibiotics. FEMS Microbiol. Lett. 100 (1992) 161-168.
53. Bainton, N.J., P. Stead, S.R. Chhabra, B.W. Bycroft, G.P.C. Salmond, G.S.A.B. Stewart, and P. Williams. Af-(3-oxohexanoyl)-L-homoserine lactone regulates carbapenem antibiotic production in Er-winia carotovora. Biochem. J. 288 (1992) 997-1004.
54. Beppu, T. Secondary metabolites as chemical signals for cellular differentiation. Gene 115 (1992) 159-165.
55. Boulnois, G.J., J.M. Varley, G.S. Sharpe, and C.F. Franklin. Transposon donor plasmids, based on ColIb-P9, for use in Pseudomonas putida and a variety of other gram negative bacteria. Mol. Gen. Genet. 200 (1985) 65-67.
56. Voisard, C, M. Rella, and D. Haas. Conjugative transfer of plasmid RP1 to soil isolates of Pseudomonas fluorescens is facilitated by certain large RP1 deletions. FEMS Microbiol. Lett. 55 (1988) 9-14.
57. Ubben, D., and R. Schmitt. Tal721 derivatives for transposon mutagenesis, restriction mapping and nucleotide sequence analysis. Gene 41 (1986) 145-152.
58. Farinha, M.A., and A.M. Kropinski. High efficiency electroporation of Pseudomonas aeruginosa using frozen cell suspensions. FEMS Microbiol. Lett. 70 (1990) 221-226.
59. Simon, R., U Priefer, and A. Pühler. Vector Plasmids for in-vivo and in-vitro manipulations of gramnegative bacteria. In: A. Pühler (ed.), Molecular genetics of the bacteria-plant interaction. Springer-Verlag, Berlin, 1983, p. 98-106.
60. Figurski, D.H. and D.R. Helinski. Replication of an origin-containing derivative of plasmid RK2 dependent on a plasmid function provided in trans. Proc. Natl. Acad. Sei. USA 76 (1979) 1648-1652.
61. Laville, J., C. Voisard, C. Keel, M. Maurhofer, G. DeTago, and D. Haas. Global control in Pseudomonas fluorescens mediating antibiotic synthesis and suppression of black root rot of tobacco. Proc. Natl. Acad. Sei. USA 89 (1992) 1562-1566.
62. Morales, V., M.M. Bagdasarian, and M. Bagdasarian. Promiscuous plasmids of the IncQ group: mode of replication and use for gene cloning in gram-negative bacteria. In: S. Silver, A.M. Chakrabarty, B. Iglewski, and S. Kaplan (eds.), Pseudomonas: Biotransformations, pathogenesis, and evolving biotechonology. American Society for Microbiology, Washington, D.C., 1990, p. 229-241.
63. Finnegan, J., and D. Sherratt. Plasmid ColEl conjugal mobility: The nature of bom, a region required in eis for transfer. Mol. Gen. Genet. 185 (1982) 344-351.
64. Haas, D., J. Watson, R. Krieg, and T. Leisinger. Isolation of an Hfr donor of Pseudomonas aeruginosa RAO by insertion of the plasmid RP1 into the tryptophan synthase gene. Mol. Gen. Genet. 182 (1981) 240-244.
65. Knauf, V.C., and E.W. Nester. Wide host range cloning vectors: A cosmid clone bank of an Agrobacterium Ti plasmid. Plasmid 8 (1982) 45-54.
66. Chan, P.T., H. Ohmori, J. Tomizawa, and J. Lebowitz. Nucleotide sequence and gene organization of ColEl DNA. J. Biol. Chem. 260 (1985) 8925-8935.
67. Weller, D. M., B.-X. Zhang, and R.J. Cook. Application of a rapid screening test for selection of bacteria suppressive to take-all of wheat. Plant Disease 69 (1985) 710-713.
68. Hale, M. G., D.L. Lindsey, and K.M. Hameed. Gnotobiotic culture of plants and related research. Bot. Rev. 39 (1973) 261-273.
69. Bennett, R.A., and Lynch, J. M. Bacterial growth and development in the rhizosphere of gnotobiotic cereal plants. J. Gen. Microbiol. 125 (1981) 95-102.
70. Kloepper, J.W., and M.N. Schroth. Plant growth-promoting rhizobacteria and plant growth under gnotobiotic conditions. Phytopathology 71 (1981) 642-644.
71. Lifshitz, R., J.W. Kloepper, M. Kozlowski, C. Simonson, J. Carlson, E.M. Tipping, and I. Zaleska. Growth promotion of canola (rapeseed) seedlings by a strain of Pseudomonas putida under gnotobiotic conditions. Can. J. Microbiol. 33 (1987) 390-395.
72. Stutz, E., G. Kahr, and G. Ddfago. Clays involved in suppression of tobacco black root rot by a strain of Pseudomonas fluorescens. Soil Biol. Biochem. 21 (1989) 361-366.
73. Keel, C, M. Maurhofer, T. Oberhänsli, C. Voisard, D. Haas, and G. Defago. Role of 2,4-diacetylphloroglucinol in the suppression of take-all of wheat by a strain of Pseudomonas fluorescens. In: A.B.R. Beemster, G.J. Bollen, M. Gerlagh, M.A. Ruissen, B. Schippers and A. Tempel (eds.), Biotic interactions and soil-borne diseases. Elsevier, Amsterdam, 1991, p. 335-339.
74. Schippers, B., A.W. Bakker, P.A.H.M. Bakker, and R. Van Peer. Beneficial and deleterious effects of HCN producing pseudomonads on rhizospere interactions. In: D.L. Keister, and P.B. Cregan (eds.), The rhizosphere and plant growth. Kluwer Academic Publishers, Dordrecht, 1991, p. 211-219.
75. Shanahan, P., D.J. O'Sullivan, P. Simpson, J. D. Glennon, and F. O'Gara. Isolation of 2,4-diacetylphloroglucinol from a fluorescent pseudomonad and investigation of physiological parameters influencing its production. Appl. Environ. Microbiol. 58 (1992) 353-358.
76. Vincent, M. N., L.A. Harrison, J.M. Brackin, P. Kovacevich, P. Mukerji, D.M. Weller, E.A. Pierson. Genetic analysis of the antifungal activity of a soilborne Pseudomonas aureofaciens strain. Appl. Environ. Microbiol. 57 (1991) 2928-2934.
77. Fenton, A.M., P.M. Stephens, J. Crowley, M. O'Callaghan, and F. O'Gara. Exploitation of gene(s) involved in 2,4-diacetylphloroglucinol biosynthesis to confer a new biocontrol capability to a Pseudomonas strain. Appl. Environ. Microbiol. 55 (1992) 3873-3878.
78. Bull, CT., D.M. Weiler, and L.S. Thomashow. Relationship between root colonization and suppression of Gaeumannomyces graminis va. tritici by Pseudomonas fluorescens strain 2-79. Phytopathology 81 (1991) 954-959.
79. Hamdan, H., D.M. Weiler, and L.S. Thomashow. Relative importance of fluorescent siderophores and other factors in biological control of Gaeumannomyces graminis var. tritici by Pseudomonas fluorescens 2-79 and M4-80R. Appl. Environ. Microbiol. 57 (1991) 3270-3277.
80. Pierson III, L.S., and L.S. Thomashow. Cloning and heterologous expression of the phenazine biosynthetic locus from Pseudomonas aureofaciens 30-84. Mol. Plant-Microbe Inter. 5 (1992) 330-339.
81. Thomashow, LS., and D.M. Weiler. Role of a phenazine antibiotic from Pseudomonas fluorescens in biological control of Gaeumannomyces graminis var. tritici. J. Bacteriol. 170 (1988) 3499-3508.
82. Thomashow, LS., D.M. Weller, R.F. Bonsall, and L.S. Pierson III. Production of the antibiotic phenazine-l-carboxylic acid by fluorescent Pseudomonas species in the rhizosphere of wheat. Appl. Environ. Microbiol. 56 (1990) 908-912.
83. Howie, W.J., and TV. Suslow. Role of antibiotic biosynthesis in the inhibition of Pythium ultimum in the cotton spermosphere and rhizosphere by Pseudomonas fluorescens. Mol. Plant-Microbe Inter. 4 (1991) 393-399.
84. Kraus, J., and J.E. Loper. Lack of evidence for a role of antifungal metabolite production by Pseudomonas fluorescens Pf-5 in biological control of Pythium damping-off of cucumber. Phytopathology 82 (1992) 264-271.
85. 2]acetate incorporation. Z. Naturforsch. 41c (1986) 532-536.
86. Parkinson, J.S., and E.C Kofoid. Communication modules in bacterial signaling proteins. Annu. Rev. Genet. 26 (1992) 71-112.
87. Zimmermann, A., C. Reimmann, M. Galimand, and D. Haas. Anaerobic growth and cyanide synthesis of Pseudomonas aeruginosa depend on am, a regulatory gene homologous with fnr of Escherichia coli. Mol. Microbiol. 5 (1991) 1483-1490.
88. Knowles, C.J., and A.W. Bunch. Microbial cyanide metabolism. Adv. Microb. Physiol. 27 (1986) 73-111.
89. Bencini, D.A., CR. Howell, and J.R. Wild. Production of phenolic metabolites by a soil pseudomonad. Soil Biol. Biochem. 15 (1983) 491-492.
90. Slininger, P.J., and M.A. Jackson. Nutritional factors regulating growth and accumulation of phenazine 1-carboxylic acid by Pseudomonas fluorescens 2-79. Appl. Microbiol. Biotechnol. 37 (1992) 388-392.
91. Dowling, D.N., B. Boesten, D.J. O'Sullivan, P. Stephens, J. Morris, and F. O'Gara. Genetically modified plant-microbe interacting strains for potential release into the rhizosphere. In: E. Galli, S. Silver, and B. Witholt (eds.), Pseudomonas: Molecular biology and biotechnology, American Society for Microbiology, Washington D.C. 1992, p. 408-414.
92. Sundheim, L., A.R. Poplawsky, and A.H. Ellingboe. Molecular cloning of two chitinase genes from Serratia marcescens and their expression in Pseudomonas species. Physiol. Mol. Plant Pathol. 33 (1988) 483-491.
93. Van Peer, R., G.J. Niemann, and B. Schippers. Induced resistance and phytoalexin accumulation in biological control of Fusarium wilt of carnation by Pseudomonas sp. strain WCS417r. Phytopathology 81 (1991) 728-734.
94. Van Peer, R., and B. Schippers. Lipopolysaccharides of plant-growth promoting Pseudomonas sp. strain WCS417r induce resistance in carnation to Fusarium wilt. Neth. J. PI. Path. 98 (1992) 129-139.
95. Wei, G., J.W. Kloepper, and A. Tuzun. Induction of systemic resistance of cucumber to Colletotrichum orbiculare by selected strains of plant growth-promoting rhizobacteria. Phytopathology 81 (1991) 1508-1512.
96. Alström, S. Induction of disease resistance in common bean susceptible to halo blight bacterial pathogen after seed bacterization with rhizosphere pseudomonads. J. Gen. Appl. Microbiol. 37 (1991) 495-501.
97. Zdor, R. E., and A.J. Anderson. Influence of root colonizing bacteria on the defense responses of bean. Plant Soil 140 (1992) 99-107.
98. Naiki, T, and R.J. Cook. Factors in loss of pathogenicity in Gaeumannomyces graminis var. tritici. Phytopathology 73 (1983) 1652-1656.
99. Simonet, J.M., D. Schneider, J.N. Volff, A. Dary, and B. Decaris. Genetic instability in Streptomyces ambofaciens: inducibility and associated genome plasticity. Gene 115 (1992) 49-54.
100. Birch, A., A. Häusler, and R. Hütter. Genome rearrangement and genetic instability in Streptomyces spp. J. Bacteriol. 172 (1990) 4138-4142.
101. Hengge-Aronis, R. Survival of hunger and stress: The role of rpoS in early stationary phase of gene regulation in E. coli. Cell 72 (1993) 165-168.
102. Olsen, A., A. Arnqvist, M. Hammar, S. Sukupolvi, and S. Normark. The RpoS factor relieves H-NS-mediated transcriptional repression of csgA, the subunit gene of fibronectin-binding curli in Escherichia coli. Mol. Microbiol. 7 (1993) 523-236.
103. Bartlett, D.H., M.E. Wright, and M. Silverman. Variable expression of extracellular polysaccharide in the marine bacterium Pseudomonas atlantica is controlled by genome rearrangement. Proc. Natl. Acad. Sei. USA 85 (1988) 3923-3927.
104. Holloway, B.W. Pseudomonas in the late twentieth century. In: E. Galli, S. Silver, B. Witholt (eds.), Pseudomonas. Molecular biology and biotechnology, American Society for Microbiology, Washington, D.C., 1992, p. 1-8.
105. Oberhänsli, T, and G. Defago. Spontaneous loss of tryptophan side chain oxidase of Pseudomonas fluorescens strain CHAO - a marker for genetic instability. In: C. Keel, B. Koller, and G. Defago (eds.), Plant growth-promoting rhizobacteria - Progress and prospects. IOBC/WPRS Bulletin 14. 1991, p. 392-398.
106. Champness, W., P. Riggle, T. Adamidis, and P. Vandervere. Identification of Streptomyces coelicolor genes involved in regulation of antibiotic synthesis. Gene 115 (1992) 55-60.
107. Smit, E., J.D. van Elsas, and J.A. van Veen. Risks associated with the application of genetically modified microorganisms in terrestrial ecosystems. FEMS Microbiol. Rev. 88 (1992) 263-278.
108. Atlas, R.M., G. Sayler, R.S. Burlage, and A.K. Bej. Molecular approaches for environmental monitoring of microorganisms. BicTechniques 12 (1992) 706-717.
109. Olson, B. H. Tracking and using genes in the environment. Environ. Sei. Technol. 25 (1991) 604-611.
110. Gould, W. D., C. Hagedorn, T.R. Bardinelli, and R.M. Zablotowicz. New selective media for enumeration and recovery of fluorescent pseudomonads from various habitats. Appl. Environ. Microbiol. 49 (1985) 28-32.
111. Byrd, J.J., H. Xu, and R.R. Colwell. Viable but nonculturable bacteria in drinking water. Appl. Environ. Microbiol. 57 (1991) 875-878.
112. Islam, M. S., M.K. Hasan, M.A. Miah, G.C. Sur, A. Felsenstein, M. Venkatesan, R.B. Sack, and M.J. Albert. Use of polymerase chain reaction and fluorescent antibody methods for detecting viable but nonculturable Shigella dysenteriae type 1 in laboratory microcosms. Appl. Environ. Microbiol. 59 (1993) 536-540.
113. Bentjen, S. A., J.K. Fredrickson, P. Van Voris, and S.W. Li. Intact soil-core microcosm for evaluating the fate and ecological impact of the release of genetically engineered microorganisms. Appl. Environ. Microbiol. 55 (1989) 189-202.
114. Frederickson, J. K., S.A. Bentjen, H. Bolton, S.W. Li, and P. Van Voris. Fate of Th5 mutants of root growth-inhibiting Pseudomonas sp. in intact soil-core microcosms. Can. J. Microbiol. 35 (1989) 867-873.
115. Kemp, J.S., E. Paterson, S.M. Gammack, M. S. Cresser, and K. Killham. Leaching of genetically modified Pseudomonas fluorescens through organic soils: Influence of temperature, soil pH, and roots. Biol. Fertil. Soils 13 (1992) 218-224.
116. Van Elsas, J. D., J.T Trevors, and L.S. Van Overbeek. Influence of soil properties on the vertical movement of genetically marked Pseudomonas fluorescens through large soil microcosms. Biol. Fertil. Soils 10 (1991) 249-255.
117. Annual Book of ASTM Standards. Standard guide for conducting a terrestrial soil-core microcosm test. Designation: E 1197, American Society for Testing and Materials, Philadelphia. Vol. 11.04. (1988) p. 743-755.
118. Kloepper, J.W., R. Lifshitz, and R.M. Zablotowicz. Free-living bacterial inocula for enhancing crop productivity. Trends Biotechnol. 7 (1989) 39-44.
119. Wüthrich, B., and G. Defago. Suppression of wheat take-all and black root rot of tobacco by Pseudomonas fluorescens strain CHAO, isolated from a rA/e/ov/opsir-suppressive soil: results of field and pot experiments. In: C. Keel, B. Koller and G. Defago (eds.), Plant growth-promoting rhizobacteria - Progress and prospects. IOBC/WPRS Bulletin 14, 1991, p. 17-22.
120. Loper, J.E., and CA. Ishimaru. Factors influencing siderophore-mediated biocontrol activity of rhizosphere Pseudomonas spp. In: D.L. Keister and P.B. Cregan (eds.), The rhizosphere and plant growth. Kluwer Academic Publishers, Dordrecht, 1991, p. 253-261.
121. Weller, D. M., and R.J. Cook. Suppression of take-all of wheat by seed treatments with fluorescent pseudomonads. Phytopathology 73 (1983) 463-469.
122. Lemanceau, P., P.A.H.M. Bakker, W. J. de Kogel, C. Alabouvette, and B. Schippers. Effect of pseudobactin 385 production by Pseudomonas putida WCS385 on suppression of fusarium wilt of carnations by nonpathogenic Fusarium oxysporum Fo47. Appl. Environ. Microbiol. 58 (1992) 2978-2982.
123. Fuchs, J., and G. Défago. Protection of tomatoes against Fusarium oxysporum f. sp. lycopersici by combining an apathogenic Fusarium with different bacteria in non-sterilized soil. In: C. Keel, B. Koller and G. Défago (eds.), Plant growth-promoting rhizobacteria - Progress and prospects. IOBC/WPRS Bulletin 14, 1991, p. 51-56.
124. Ownley, B.H., D.M. Weiler, and L.S. Thomashow. Influence of in situ and in vitro pH on suppression of Gaeumannomyces graminis va. tritici by Pseudomonas fluorescens 2-79. Phytopathology 82 (1992) 178-184.
125. Paulitz, T.C., and J.E. Loper. Lack of a role for fluorescent siderophore production in the biological control of pythium damping-off of cucumber by a strain of Pseudomonas putida. Phytopathology 81 (1991) 930-935.