Symbiotic Nitrogen Fixation.
نویسندگان
چکیده
منابع مشابه
Symbiotic Nitrogen Fixation.
Biosphere nitrogen is subjected to rapid turnover, and because it is eventually lost as nitrogen into the atmosphere, its maintenance requires continuous replenishment with reduced nitrogen from atmospheric nitrogen. Biological reduction of nitrogen to ammonia can be performed only by some prokaryotes and is a highly oxygen-sensitive process. The most efficient nitrogen fixers establish a symbi...
متن کاملMolecular genetics of symbiotic nitrogen fixation.
Although most organisms, including all eucaryotes, cannot assimilate atmospheric dinitrogen (N2), a group of evolutionarily divergent procaryotes are able to reduce N2 directly to ammonia (nitrogen fixation) under a variety of physiological conditions. The molecular genetics of nitrogen fixation has been studied primarily in Klebsiella pneumoniae because of its close taxonomic relation to Esche...
متن کاملInsights into symbiotic nitrogen fixation in Medicago truncatula.
In silico analysis of the Medicago truncatula gene index release 8.0 at The Institute for Genomic Research identified approximately 530 tentative consensus sequences (TC) clustered from 2,700 expressed sequence tags (EST) derived solely from Sinorhizobium meliloti-inoculated root and nodule tissues. A great majority (76%) of these TC were derived exclusively from nitrogen-fixing and senescent n...
متن کاملOntogenetic Interactions between Photosynthesis and Symbiotic Nitrogen Fixation in Legumes.
Photosynthetic data collected from Pisum sativum L. and Phaseolus vulgaris L. plants at different stages of development were related to symbiotic N(2) fixation in the root nodules. The net carbon exchange rate of each leaf varied directly with carboxylation efficiency and inversely with the CO(2) compensation point. Net carbon exchange of the lowest leaves reputed to supply fixed carbon to root...
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ژورنال
عنوان ژورنال: The Plant Cell
سال: 1995
ISSN: 1040-4651,1532-298X
DOI: 10.1105/tpc.7.7.869