Limitations and Potentials for Biological Nitrogen Fixation by J. C. de A. Azevedo (auth.), Johanna Döbereiner, Robert H.

By J. C. de A. Azevedo (auth.), Johanna Döbereiner, Robert H. Burris, Alexander Hollaender, Avilio A. Franco, Carlos A. Neyra, David Barry Scott (eds.)

The fifteenth Latin American Symposium ''laS held in Brasilia (FD) on J1UY 18-22, 1977, on a subject of serious curiosity for agriculture, in particular within the tropics. Many new advancements have taken position within the box of study in N2 fixation over the last few years. They "Tere made attainable through the enhanced tools of measuring of nitrogenase job, growth in genetic engineering fields and the elevated curiosity in profiting from common resources for organic nitrogen fixation. The technique utilized in this Symposium including the single held 4 months prior in Brookhaven on ;'Genetic Engineering for Nitrogen Fixation" offers a fascinating photograph of the current prestige of nitrogen fixation from varied methods. this can be my twentieth yr traveling Latin i'-J11.erica. i'm such a lot inspired with the great improvement which has taken position in the course of those years in Latin American technology. i need to congrat­ ulate our Brazilian colleagues for arranging this glorious and well timed symposium and its first-class association. those symposia are a cooperative attempt among our Latin colleagues and scientists allover the area. they're made attainable via very good neighborhood aid and aid by way of a few foreign companies and a number of other teams within the usa. prior symposia during this sequence are indexed on pp. viii-x. Alexander Hollaender vii viii PREFACE I. foreign Symposium on Tissue Transplantation--Santiago, Vifia del Mar, and Valparaiso, Chile. released in 1962 via the collage of Chile Press, Santiago; edited through A. P. Cristoffanini and Gustavo Hoecker; 269 pp.

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Limitations and Potentials for Biological Nitrogen Fixation in the Tropics

The fifteenth Latin American Symposium ''laS held in Brasilia (FD) on J1UY 18-22, 1977, on a subject of serious curiosity for agriculture, specifically within the tropics. Many new advancements have taken position within the box of analysis in N2 fixation over the past few years. They "Tere made attainable by way of the enhanced tools of measuring of nitrogenase job, development in genetic engineering fields and the elevated curiosity in benefiting from traditional resources for organic nitrogen fixation.

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1972) Biochem. Biophys. Res. Commun. 47, 322. G. (1977) J. Fisheries Res. Board Can. 34, 416. Hamad-Fares, I. (1976) La fixation de l'azote dans la rhizosphere du riz. These de Docteur es Sciences Nature11es, Nancy, France. C. (1968) Plant Physiol. 43, 1185. W. (1958) J. Bacteriol. 75, 403. A. (1973) J. Gen. Microbiol. 77, 225. , and Seto, N. (1969) J. Gen. Appl. Microbiol. IS, 11. FREE-LIVING BACTERIA 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. 65. 66. 67.

Brasil, 5, 147. FIXATION POTENTIAL IN LEGUMES AND GRASSES 23 25. Franco, A. , Pereira, J. C. and Neyra, C. A. (1977) see this Symposium. 26. Franco, A. A. and Day, J. M. (1975) V American Rhizobium Conf. Raleigh, USA. 27. , Franco, A. , Azevedo, H. and DBbereiner, J. (1971) Pesq. Agropec. Brasil. Ser Agron. 6, 1. 28. Goodland, R. J. and Irwin, H. S. (1977) In "Extinction is Forever" N. Y. Botanical Garden, p. 29. Guazzelli, R. J. and Vieira, I. F. (1970) Ann. Rep. Inst. Pesq. Agropec. Oeste, Sete Logoas, Brazil.

F. (1976) XI Reun. Brasil. Milho e Sorgo, Piracicaba, Brazil. 68. Watanabe, Y. and Kuk-Ki-Lee (1975) In Biological Nitrogen Fixation in Farming Systems in the Tropics. IITA, Ibadan, Nigeria. FREE-LIVING BACTERIA Roger Knowles Department of Microbiology, Macdonald Campus of McGill University, Ste Anne de Bellevue, Que. ROA ICO, Canada I N T ROD U C T ION Free-living or asymbiotic N2-fixing bacteria are very widely distributed taxonomically, geographically and ecologically. Before considering a number of N2 fixation systems we will review the current list of N2-fixing bacteria and the habitats in which they are observed to occur.

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