From the contents Preface -- Dedication -- Section I. Nitrogenase: The Origin, the Enzymes, and the Chemistry -- Section II. Genetics and Regulation in Heterotrophs and Photosynthetic Bacteria -- Section III. From Genomes to Function -- Section IV. Establishment of Symbiosis and Nodule Function -- Section V. Towards Sustainable Agriculture and Protection of the Environment -- Section VI. Molecu…