Genetics and molecular biology of Azospirillum

Biology and Fertility of Soils

Volumn 29, Issue 1, 1999, Pages 10-23

  Holguin, G ^a,b   Patten, C L ^a   Glick, B R ^a  

^a UNIVERSITY OF WATERLOO   (Canada)

^b CENTRO DE INVESTIGACIONES BIOLÓGICAS DEL NOROESTE   (Mexico)

Author keywords

Azospirillum; Plant interaction genes; Plant growth promoting rhizobacteria; Plasmid p90; Promoter sequences

Indexed keywords

BIOSYNTHESIS; CARBON DIOXIDE FIXATION; GENE ISOLATION; GENETIC MANIPULATION; MOLECULAR GENETICS; NITROGEN FIXATION; PHYTOHORMONE; PLANT DEVELOPMENT; PLANT GROWTH; TRYPTOPHAN;

BACTERIUM; GENETIC ENGINEERING; NITROGEN FIXATION;

AZOSPIRILLUM;

EID: 0032920795     PISSN: 01782762     EISSN: None     Source Type: Journal    
DOI: 10.1007/s003740050519     Document Type: Review

References (115)

1. Abdel-Salam MS, Klingmüller W (1987) Transposon Tn5 mutagenesis in Azospirillum lipoferum: isolation of indole acetic acid mutants. Mol Gen Genet 210:165-170
2. Altabe S, Iannino NI de, de-Mendoza D, Ugalde RA (1990) Expression of the Agrobacterium tumefaciens chvB virulence region in Azospirillum spp. J Bacteriol 172:2563-2567
3. Antonyuk LP, Fomina OR, Galkin MA, Ignatov VV (1993) The effect of wheat germ agglutinin on dinitrogen fixation, glutamine synthetase activity and ammonia excretion in Azospirillum brasilense Sp245. FEMS Microbiol Lett 110:285-289
4. Arsène F, Katupitiya S, Kennedy IR, Elmerich C (1994) Use of lacZ fusions to study the expression of nif genes of Azospirillum brasilense in association with plants. Mol Plant Microbe Inter 7:748-757
5. II in Azospirillum brasilense: evidence for a regulatory role of the NifA N-terminal domain. J Bacteriol 178:4830-483
6. Bally R, Givaudan A (1988) Mobilization and transfer of Azospirillum lipoferum plasmid by the Tn5-Mob transposon into a plasmid-free Agrobacterium tumefaciens strain. Can J Microbiol 34:1354-1357
7. Bar T, Okon Y (1993) Tryptophan conversion to indole-3-acetic acid via indole-3-acetamide in Azospirillum brasilense Sp7. Can J Microbiol 39:81-86
8. Barbieri P, Zanelli T, Galli E, Zanetti G (1986) Wheat inoculation with Azospirillum brasilense Sp6 and some mutants altered in nitrogen fixation and indole-3-acetic acid production. FEMS Microbiol Lett 36:87-90
9. Bashan Y, Holguin G (1997) Azospirillum/plant relationships: environmental and physiological advances (1990-1996). Can J Microbiol 43:103-121
10. Bashan Y, Levanony H (1990) Current status of Azospirillum inoculation technology: Azospirillum as a challenge for agriculture. Can J Microbiol 36:591-608
11. Bashan Y, Levanony H, Whitmoyer RE (1991) Root surface colonization of non-cereal crop plants by pleomorphic Azospirillum brasilense Cd. J Gen Microbiol 137:187-196
12. Bastarrachea F, Zamudio M, Rivas R (1988) Non-encapsulated mutants of Azospirillum brasilense and Azospirillum lipoferum. Can J Microbiol 34:24-29
13. Bazzicalupo M, Fani R, Gallori E, Turbanti L, Polsinelli M (1987) Cloning of the histidine, pyrimidine and cysteine genes of Azospirillum brasilense: expression of pyrimidine and three clustered histidine genes in Escherichia coli. Mol Gen Genet 206:76-80
14. Beijerinck MW (1925) Über ein Spirillum, welches freien Stickstoff binden kann? Zentralbl Bakteriol Parasitenkd Infektionskr Abt 63:353-359
15. Bozouklian H, Elmerich C (1986) Nucleotide sequence of the Azospirillum brasilense Sp7 glutamine synthetase structural gene. Biochimie 68:1181-1187
16. Bruijn FJ de, Ausubel F (1983) The cloning and characterization of the glnF (rpoN) gene of Klebsiella pneumoniae; role of glnF (ntrA.) in the regulation of nitrogen fixation (nif) and other nitrogen assimilation genes. Mol Gen Genet 192:342-353
17. Chattopadhyay S, Mukherjee A, Ghosh S (1993) Azospirillum brasilense locus coding for phosphoenolpyruvate:fructose phosphotransferase system and global regulation of carbohydrate metabolism. J Bacteriol 175:3240-3243
18. Chattopadhyay S, Mukherjee A, Ghosh S (1994) Molecular cloning and sequencing of an operon, carRS of Azospirillum brasilense, that codes for a novel two-component regulatory system: demonstration of a positive regulatory role of carR for global control of carbohydrate catabolism. J Bacteriol 176:7484-7490
19. Costacurta A, Keijers V, Vanderleyden J (1994) Molecular cloning and sequence analysis of an Azospirillum brasilense indole-3-pyruvate decarboxylase gene. Mol Gen Genet 243:463-472
20. Croes C, Vanderleyden J, Michiels K (1990) Construction of an Azospirillum brasilense Sp7 recA mutant. Mol Gen Genet 223:152-155
21. Croes C, Van Bastelaere E, DeClercq E, Eyers M, Vanderleyden J, Michiels K (1991) Identification and mapping of loci involved in motility, adsorption to wheat roots, colony morphology, and growth in minimal medium on the Azospirillum brasilense Sp7 90-MDa plasmid. Plasmid 26:83-93
22. Croes CL, Moens S, Van Bastelaere E, Vanderleyden J, Michiels KW (1993) The polar flagellum mediates Azospirillum brasilense adsorption to wheat roots. J Gen Microbiol 139:2261-2269
23. De Troch P, Vanderleyden J (1996) Surface properties and motility of Rhizobium and Azospirillum in relation to plant root attachment. Microb Ecol 32:149-169
24. De Troch P, Dosselaere F, Keyers V, de Wilde P, Vanderleyden J (1996) Isolation and characterization of the Azospirillum brasilense trpE (G) gene, encoding anthranilate synthase. Current Microbiology 34:27-32
25. Del Gallo M, Negi M, Neyra C (1989) Calcofluor- and lectin-binding exocellular polysaccharides of Azospirillum brasilense and Azospirillum lipoferum. J Bacteriol 171:3504-3510
26. Döbereiner J, Day JM (1976) Associative symbioses in tropical grasses: characterization of microorganisms and dinitrogen-fixing sites. In: Newton WE, Nyman CJ (eds) Proceedings of the 1st International Symposium on Nitrogen Fixation. Pullman, Wash. June 3-7, 1974. Washington State University Press, Pullman, pp 518-538
27. Dosselaere F, Vande Broek A, Lambrecht M, De Troch P, Prinson E, Okon Y, Keijers V, Vanderleyden J (1997) Indole-3-acetic acid biosynthesis in Azospirillum brasilense. In: Ogoshi A, Kobayashi K, Homma Y, Kodama F, Kondo N, Akino S (eds) Plant growth-promoting rhizobacteria: present status and future prospects. OECD, Paris, pp 306-309
28. Elmerich C (1983) Azospirillum genetics. In: Puhler A (ed) Molecular genetics of the bacteria-plant interaction. Springer, Berlin Heidelberg New York, pp 367-372
29. Elmerich C (1986) Azospirillum. In: Broughton WJ, Puhler A (eds) Nitrogen fixation-molecular biology. Clarendon, Oxford, pp 106-126
30. Elmerich C (1994) Regulation of Nitrogen fixation and nitrogen metabolism in Azosprilillum brasilense: a review. In: Hegazi NA, Fayez M. Monib M (eds) Nitrogen fixation with non-legumes. The American University in Cairo Press, Cairo, pp 237-249
31. Elmerich C, Zamaroczy M de, Arsène F, Pereg L, Paquelin A, Kaminski A (1997) Regulation of nif gene expression and nitrogen metabolism in Azospirillum. Soil Biol Biochem 29:847-852
32. Fahsold R, Singh M, Klingmüller W (1985) Cosmid cloning of nitrogenase structural genes of Azospirillum lipoferum. In: Klingmüller W (ed) Azospirillum III: genetics, physiology, ecology. Springer, Berlin Heidelberg New York, pp 30-38
33. Falk EC, Johnson JL, Baldani VLD, Döbereiner J, Krieg NR (1986) Deoxyribonucleic and ribonucleic acid homology studies of the genera Azospirillum and Conglomeromonas. Int J Syst Bacteriol 36:80-95
34. Fallik E, Okon Y (1996) Inoculants of Azospirillum brasilense: biomass production, survival and growth promotion of Setaria italica and Zea mays. Soil Biol Biochem 28:123-126
35. Fani R, Bazzicalupo M, Coianiz P, Polsinelli M (1986) Plasmic transformation of Azospirillum brasilense. FEMS Microbiol Lett 35:23-27
36. Fani R, Allotta G, Bazzicalupo M, Ricci F, Schipani C, Polsinelli M (1989) Nucleotide sequence of the gene encoding the nitrogenase iron protein (nifH) of Azospirillum brasilense and identification of a region controlling nifH transcription. Mol Gen Genet 220:81-87
37. Fani R, Bazzicalupo M, Gallori E, Giovannetti L, Ventura S, Polsinelli M (1991) Restriction fragment length polymorphism of Azospirillum strains. FEMS Microbiol Lett 83:225-230
38. Faure D, Bouillant ML, Bally R (1994) Isolation of Azospirillum lipoferum 4T Tn5 mutants affected in melanization and laccase activity. Appl Environ Microbiol 60:3413-3415
39. Fogher C, Dusha H, Barbot P, Elmerich C (1985) Heterologous hybridization of Azospirillum DNA to Rhizobium nod and fix genes. FEMS Microbiol Lett 30:245-249
40. Frazzon J, Vedoy C, Passaglia MP, Schrank TS (1995) International Symposium on Sustainable Agriculture for the Tropics: the Role of Biological Nitrogen Fixation, Angra dos Reis, Brazil, 26 Nov-1 Dec 1994
41. Fu HA, Fitzmaurice WP, Roberts GP, Burris RH (1990) Cloning and expression of draTG genes from Azospirillum lipoferum. Gene 86:95-98
42. Fujimoto H, Itoh K, Yamamoto M, Kyosuka J, Shimamoto K (1993) Insect-resistant rice generated by introduction of a modified delta endotoxin gene of Bacillus thuringiensis. Biotechnology 11:1151-1155
43. Galimand M, Perroud B, Delorme F, Paquelin A, Vieille C, Bozouklian H, Elmerich C (1989) Identification of DNA regions homologous to nitrogen fixation genes nifE, nifUS and fixABC in Azospirillum brasilense Sp7. J Gen Microbiol 135:1047-1059
44. Glick BR (1995) The enhancement of plant growth by free-living bacteria. Can J Microbiol 41:109-117
45. Hartmann A, Singh M, Klingmüller W (1983) Isolation and characterization of Azospirillum mutants excreting high amounts of indoleacetic acid. Can J Microbiol 29:916-923
46. Inoue A, Shigematsu T, Hidaka M, Masaki H, Uozumi T (1996) Cloning, sequencing and transcriptional regulation of the draT and draG genes of Azospirillum lipoferum FS. Gene 170:101-106
47. Jain DK, Patriquin DG (1985) Characterization of a substance produced by Azospirillum which causes branching of wheat root hairs. Can J Microbiol 31:206-210
48. Katzy EI, Iosipenko AD, Egorenkov DA, Zhuravleva EA, Panasenko VI, Ignatovi VV (1990) Involvement of Azospirillum brasilense plasmid DNA in the production of indole acetic acid. FEMS Microbiol Lett 72:1-4
49. Keijers V, Dobbelaere S, Bekri MA, Vanderleyden J (1995) Biodegradation of polysaccharides by Azospirillum. In: Fendrik I, Del Gallo M, Vanderleyden J, Zamaroczy M de (eds) Azospirillum VI and related microorganisms, genetics-physiology-ecology. NATO ASI series, series G: ecological sciences, vol G37. Springer, Berlin Heidelberg New York, pp 105-111
50. Khammas KM, Ageron E, Grimont PAD, Kaiser P (1989) Azospirillum irakense sp. nov., a nitrogen-fixing bacterium associated with rice roots and rhizosphere soil. Res Microbiol 140:679-693
51. Kimmel S, Reinhold-Hurek B, Fendrik I, Niemann EG (1990) Contribution of chemotaxis and aerotaxis to the establishment of Azospirillum in the rhizosphere. Symbiosis 9:195-197
52. Klingmüller W (1982) Preface. In: Klingmüller W (ed) Azospirillum: genetics, physiology, ecology. Springer, Berlin Heidelberg New York, pp 5-7
53. Kolb W, Martin P (1985) Response of plant roots to inoculation with Azospirillum brasilense and to application of indole acetic acid. In: Klingmüller W (ed) Azospirillum III: genetics, physiology, ecology. Springer, Berlin Heidelberg New York, pp 215-221
54. Krieg NR, Döbereiner J (1986) The genus Azospirillum. In: Krieg NR, Holt JG (eds) Bergey's manual of systematic bacteriology, vol. 1. Williams and Wilkins, Baltimore, pp 96-104
55. Liang YY, Kaminski PA, Elmerich C (1991) Identification of a nifA-like regulatory gene of Azospirillum brasilense Sp7 expressed under conditions of nitrogen fixation and in the presence of air and ammonia. Mol Microbiol 5:2735-2744
56. Liang YY, Arsène F, Elmerich C (1993) Characterization of the ntrBC Lyenes of Azospirillum brasilense Sp7: their involvement in the regulation of nitrogenase synthesis and activity. Mol Gen Genet 240:188-196
57. Machado HB, Yates MG, Funayama S, Rigo LU, Steffens MBR, Souza EM, Pedrosa FO (1995) The ntrBC genes of Azospirillum brasilense are part of a nifR3-like-ntrB-ntrC operon and are negatively regulated. Can J Microbiol 41:674-684
58. Mandal AK, Ghosh S (1993) Isolation of a glutamate synthase (GOGAT)-negative, pleiotropically N utilization-defective mutant of Azospirillum brasilense: cloning and partial characterization of GOGAT structural gene. J Bacteriol 175:8024-8029
59. Merrick MJ (1992) Regulation of nitrogen fixation genes in free-living and symbiotic bacteria. In: Stacey G, Burris RH, Evans HJ (eds) Biological nitrogen fixation. Chapman and Hall, New York, pp 835-876
60. Michiels KW, Vanderleyden J, Gool A van, Signer ER (1988) Isolation and characterization of Azospirillum brasilense loci that correct Rhizobium meliloti exoB and exoC mutations. J Bacteriol 170:5401-5404
61. Michiels K, Troch P de, Onyeocha I, Gool A van, Elmerich C, Vanderleyden J (1989) Plasmid localization and mapping of two Azospirillum brasilense loci that affect exopolysaccharide synthesis. Plasmid 21:142-146
62. Michiels K, Verreth C, Vanderleyden J (1990) Azospirillum lipoferum and Azospirillum brasilense surface polysaccharide mutants that are affected in flocculation. J Appl Bacteriol 69:705-711
63. Michiels KW, Croes CL, Vanderleyden J (1991) Two different modes of attachment of Azospirillum brasilense Sp7 to wheat roots. J Gen Microbiol 137:2241-2246
64. Michiels K, Vanderleyden J, Elmerich C (1994) Genetics and molecular biology of Azospirillum. In: Okon Y (ed) Azospirillum/plant associations. CRC Press, Boca Raton, Fla., pp 41-56
65. Milcamps A, Keyers V, Vanderleyden J (1993) Identification of a nifW-like gene in Azospirillum brasilense. Biochim Biophys Acta 1173:237-238
66. Milcamps A, van Dommelen A, Stigter J, Vanderleyden J, de Bruijn FJ (1996) The Azospirillum brasilense rpoN gene is involved in nitrogen fixation, nitrate assimilation, ammonium uptake, and flagellar biosynthesis. Can J Microbiology 42:467-478
67. Milcamps A, Van Dommelen A, Stigter J, Vanderleyden J, Bruijn FJ de (1996) The Azospirillum brasilense rpoN gene is involved in nitrogen fixation, nitrate assimilation, ammonium uptake, and flagellar biosynthesis. Can J Microbiol 42:467-478
68. Mirelman D, Galun E, Sharon N, Lotan R (1975) Inhibition of fungal growth by wheat germ agglutinin. Nature 256:414-416
69. Moat AG, Foster JW (1988) Microbial physiology. Wiley, New York, p 597
70. Moens S, Michiels K, Keijers V, Leuven FV Vanderleyden J (1995) Cloning, sequencing, and phenotypic analysis of laf1, encoding the flagellin of the lateral flagella of Azospirillum brasilense Sp7. J Bacteriol 177:5419-5426
71. Mori E, Fulchieri M, Indorato C, Fani R, Bazzicalupo M (1996) Cloning, nucleotide sequencing, and expression of the Azospirillum brasilense lon gene: involvement in iron uptake. J Bacteriol 178:3440-3446
72. Okon Y, Itzigsohn R (1995) The development of Azospirillum as a commercial inoculant for improving crop yields. Biotechnol Adv 13:365-374
73. Okon Y, Labandera-Gonzalez CA (1994) Agronomic applications of Azospirillum: an evaluation of 20 years worldwide field inoculation. Soil Biol Biochem 26:1591-1601
74. Onyeocha I, Vieille C, Zimmer W, Baca BE, Flores M, Palacios R, Elmerich C (1990) Physical map and properties of a 90-MDa plasmid of Azospirillum brasilense Sp7. Plasmid 23:169-182
75. Passaglia LP, Nunes CP, Zaha A, Schrank IS (1991) The nifHDK operon in the free-living nitrogen-fixing bacteria Azospirillum brasilense sequentially comprises genes H, D, K, an 353-bp ORF, and gene Y. Braz J Med Biol Res 24:649-675
76. Passaglia LP, Schrank A, Schrank IS (1995) The two overlapping Azospirillum brasilense upstream activator sequences have differential effects on nifH promoter activity. Can J Microbiol 41:849-854
77. Patten C, Glick BR (1996) Bacterial biosynthesis of indole-3-acetic acid. Can J Microbiol 42:207-220
78. Pedrosa FP, Yates MG (1984) Regulation of nitrogen fixation (nif) genes of Azospirillum brasilense by NifA and NtrC (gln)-type gene products. FEMS Microbiol Lett 23:95-101
79. Pelanda R, Vanoni MA, Perego M, Piubelli L, Galizzi A, Curti B, Zanetti G (1993) Glutamate synthase genes of the diazotroph Azospirillum brasilense. J Biol Chem 268:3099-3106
80. Pereg-Gerk L, Paquelin A, Gounon P, Kennedy IR, Elmerich C (1998) A transcriptional regulator of the LuxR-TtpA family, FlcA, controls flocculation and wheat root surface colonization by Azospirillum brasilense Sp7. Mol Plant Microbe Interact 3:177-187
81. Perito B, Fani R, Mastromei G (1995) Cloning of a Streptomyces endoglucanase gene in Azospirillum brasilense. In: Fendrik I, Del Gallo M, Vanderleyden J, de Zamaroczy M (eds) Azospirillum VI and related microorganisms, genetics-physiology-ecology. NATO ASI series, series G: ecological sciences, vol G37. Springer, Berlin Heidelberg New York, pp 149-154
82. Piccoli P, Bottini R (1994) Effects of C/N ratio, N content, pH, and incubation time on growth and gibberellin production by Azospirillum lipoferum. Symbiosis 17:229-236
83. Prinsen E, Costacurta A, Michiels K, Vanderleyden J, Van Onckelen H (1993) Azospirillum brasilense indole-3-acetic acid biosynthesis: evidence for a non-tryptophan dependent pathway. Mol Plant Microbe Interact 6:609-615
84. Ramschütz S, Kraft K, Klingmüller W (1992) Cloning and genetic analysis of the tryptophan genes of Azospirillum lipoferum. Symbiosis 13:159-169
85. Rhijn P van, Vanstockem M, Vanderleyden J, De Mot R (1990) Isolation of behavioral mutants of Azospirillum brasilense by using Tn5 lacZ. Appl Environ Microbiol 56:990-996
86. Sadasivan L, Neyra CA (1985) Flocculation in Azospirillum brasilense and Azospirillum lipoferum: exopolysaccharides and cyst formation. J Bacteriol 163:716-723
87. Schenk SU, Werner D (1988) Fatty acid analysis of four Azospirillum species reveals three groups. Arch Microbiol 149:580-582
88. Schipani C, Bazzicalupo M, Gallori E, Luzi E, Turbanti L, Fani R (1988) Cloning of Azospirillum brasilense sequences promoting transcription in Escherichia coli. In: Klingmüller W (ed) Azospirillum. IV. genetics, physiology, ecology. Springer, Berlin Heidelberg New York, pp 10-15
89. - mutants and molecular cloning of the mutagenized nif DNA. Mol Gen Genet 202:136-142
90. Singh M, Tripathi AK, Klingmüller W (1989) Identification of a regulatory nifA type gene and physical mapping of cloned new nif regions of Azospirillum brasilense. Mol Gen Genet 219:235-240
91. Tripathi AK, Mishra BM (1996) Isolation and characterization of Azospirillum lipoferum locus that complements Rhizobium meliloti dctA and dctB mutations. Can J Microbiol 42:503-506
92. Udayasuriyan V, Nakamura A, Masaki H, Uozumi T (1995) Transfer of an insecticidal protein gene of Bacillus thuringiensis into plant-colonizing Azospirillum. World J Microbiol Biotechnol 11:163-167
93. Uozumi T, Wang PL, Tonouchi N, Nam JH, Kim YM, Beppu T (1986) Cloning and expression of the nifA. gene of Klebsiella oxytoca in K. pneumoniae and Azospirillum lipoferum. Agric Biol Chem 50:1539-1544
94. Van Bastelaere E, Keijers V, Vanderleyden J (1995) Cloning and sequencing of the putative Azospirillum brasilense gene encoding GTP cyclohydrolase II. Gene 153:141-142
95. Van Dommelen A, Van Bastelaere E, Keijers V, Vanderleyden J (1997) Genetics of Azospirillum brasilense with respect to ammonia transport, sugar uptake and chemotaxis. Plant Soil 194:155-160
96. Vande Broek A, Vanderleyden J (1995) Review: genetics of the Azospirillum-plant association. Crit Rev Plant Sci 5:445-466
97. Vande Broek A, Gool A van, Vanderleyden J (1989) Electroporation of Azospirillum brasilense with plasmid DNA. FEMS Microbiol Lett 61:177-182
98. Vande Broeck A, Michiels J, Faria SM de, Milcamps A, Vanderleyden J (1992) Transcription of the Azospirillum brasilense nifH gene is positively regulated by NifA and NtrA and is negatively controlled by the cellular nitrogen status. Mol Gen Genet 232:279-283
99. Vande Broek A, Keijers V, Vanderleyden J (1996) Effect of oxygen on the free-living nitrogen fixation activity and expression of the Azospirillum brasilense nifH gene in various plant-associated diazotrophs. Symbiosis 21:25-40
100. Vanstockem M, Michiels K, Vanderleyden J, Gool AP van (1987) Transposon mutagenesis of Azospirillum brasilense and Azospirillum lipoferum: physical analysis of Tn5 and Tn5-Mob insertion mutants. Appl Environ Microbiol 53:410-415
101. Vieille C, Elmerich C (1990) Characterization of two Azospirillum brasilense Sp7 plasmid genes homologous to Rhizobium meliloti nod PQ. Mol Plant Microbe Interact 3:389-400
102. Vieille C, Elmerich C (1992) Characterization of an Azospirillum brasilense Sp7 gene homologous to Alcaligenes eutrophus phbB and to Rhizobium meliloti nodG. Mol Gen Genet 231:375-384
103. Waelkens F, Maris M, Verreth C, Vanderleyden J, Van Gool A (1987) Azospirillum DNA shows homology with Agrobacterium chromosomal virulence genes. FEMS Microbiol Lett 43:241-246
104. Xia Y, Embley TM, O'Donnell AG (1994) Phylogenetic analysis of Azospirillum by direct sequencing of PCR-amplified 16S rDNA. Syst Appl Microbiol 17:197-201
105. Yahalom E, Okon Y, Dovrat A (1990) Possible mode of action of Azospirillum brasilense strain Cd on the root morphology and nodule formation in burr medic (Medicago polymorpha). Can J Microbiol 36:10-14
106. Zamaroczy M de (1995) Genetic control of nitrogen assimilation and nitrogen fixation in free-living Azospirillum brasilense: a review. In: Fendrik I, Del Gallo M, Vanderleyden J, de Zamaroczy M (eds) Azospirillum VI and related microorganisms, genetics-physiology-ecology. NATO ASI series, series G: ecological sciences, vol G37. Springer, Berlin Heidelberg New York, pp 77-95
107. Zamaroczy M de, Delorme F, Elmerich C (1989) Regulation of transcription and promoter mapping of the structural genes for nitrogenase (nifHDK.) of Azospirillum brasilense Sp7. Mol Gen Genet 220:88-94
108. Zamaroczy M de, Paquelin A, Elmerich C (1993) Functional organization of the glnB-glnA cluster of Azospirillum brasilense. J Bacteriol 175:2507-2515
109. II proteins in Azospirillum brasilense. J Bacteriol 178:4143-4149
110. Zhang Y, Burris RH, Roberts GP (1992) Cloning, sequencing, mutagenesis, and functional characterization of draT and draG genes from Azospirillum brasilense. J Bacteriol 174:3364-3369
111. Zhang Y, Burris RH, Ludden PW, Roberts GP (1994) Posttranslational regulation of nitrogenase activity in Azospirillum brasilense ntrBC mutants: ammonium and anaerobic switch-off occurs through independent signal transduction pathways. J Bacteriol 176:5780-5787
112. Zhang Y, Burris RH, Ludden PW, Roberts GP (1996) Presence of a second mechanism for the post-translational regulation of nitrogenase activity in Azospirillum brasilense in response to ammonium. J Bacteriol 178:2948-2953
113. Zimmer W, Aparicio C, Elmerich C (1991) Relationship between tryptophan biosynthesis and indole-3-acetic acid production in Azospirillum: identification and sequencing of a trpGDC cluster. Mol Gen Genet 229:41-51
114. Zimmer W, Hundeshagen B (1994) Identification and sequencing of pyrG, the CTP synthetase gene of Azospirillum brasilense Sp7. FEMS Microbiol Lett 115:273-278
115. Zimmer W, Kloos K, Hundeshagen B, Niederau E, Bothe H (1995) Auxin biosynthesis and denitrification in plant growth promoting bacteria. In: Fendrik I, Del Gallo M, Vanderleyden J, Zamaroczy M de (eds) Azospirillum VI and related microorganisms,genetics-physiology-ecology. NATO ASI series, series G: ecological sciences, vol G37. Springer, Berlin Heidelberg New York, pp 121-128