By Jeverson Frazzon, Johan Spee, Jason Christiansen, Dennis R. Dean (auth.), Andrzej Legocki, Hermann Bothe, Alfred Pühler (eds.)
Biological nitrogen fixation (BNF) - the conversion of molecular nitrogen into ammonia - is likely one of the most vital reactions in ecology and agriculture. it's played solely by way of microbes (prokaryotes) that reside in symbiosis with vegetation. This publication summarizes the most recent study in this response, the engaging microbes and the genetics of the way their correct genes can be transferred into the vegetation. within the gentle of a extra sustainable and not more ecologically harmful agriculture, this is often changing into an more and more urgent issue.
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Acknowledgements We thank Clare Gough for her careful review of this manuscript. Part of this work was supported by grants from the Human Frontier Science Programme (RG-378-92) and from the European Communities BIOTECH Programme (PTP CT93-04(0). , and Stacey, G. (1994). The biosynthesis of rhizobial lipo-oligosaccharide nodulation signal molecules. Mol. PlantMicrobe Interact. 7: 684-695. , and Denarie, J. (1996). The NodA proteins of Rhizobium meliloti and R. tropici specify the N-acylation of Nod factors by different fatty acids.
Mol. Plant-Microbe Interact. 7: 384-390. O. Box 521, H-6701 Szeged, Hungary Introduction. Rhizobium meliloti has a relatively narrow host range which includes only the species of the genera Medicago, Melilotus and Trigon ella. The lipo-chitooligosaccharide signals (Nod factors) of R. meliloti have a tetrameric or pentameric chitooligosaccharide backbone which is substituted by an N-linked acyl moiety, mainly by a C16:2 fatty acid. , 1996; Schultze and Kondorosi, 1996). These structural parameters influence the signal activity on the host plants of R.
And Torrey. G. 1976. Identification of cytokinins of root nodules of the garden pea. Pisum sativum L. Plant Physiol. 57:602-606. Torrey. G. 1961. Kinetin as bigger for mitosis in mature endomitotic plant cells. Exp. Cell Res. 23:291299. Wu. • R. Dickstein. AJ. Cary. H. Norris. 1996. The auxin transport inhibitor N-(1naphthyl)phthalarnic acid elicits pseudonodules on nonnodulating mutants of white sweetclover. PlantPhysioJ. 110:501-510. Nod-factor Attachment, Calcium-fluxes, and Lipidtransfer Proteins in Symbiotic Signal Transduction.
Biological Fixation of Nitrogen for Ecology and Sustainable Agriculture by Jeverson Frazzon, Johan Spee, Jason Christiansen, Dennis R. Dean (auth.), Andrzej Legocki, Hermann Bothe, Alfred Pühler (eds.)