Fixation of Nitrogen by Plants
نویسندگان
چکیده
منابع مشابه
Nitrogen Fixation by Ceanothus.
The rapidity of successioni of Ceanothus species in burned-over areas where they are indigenous and the apparent enhancing effect which these species have on the development of other shrubs and ground cover suggests that Ceanothus has a soil-improvement effect and implies the fixation of nitrogen. Nodulation of some species of Ceanothus was observed as early as 1912 (3). Bottomley and also Petr...
متن کاملNitrogen Fixation by Azotobacter vinelandii
Nitrogenase was isolated and purified from wildtype and a tungsten-resistant mutant (LM2) of Azotobacter vinelandii strain OP derepressed on medium containing 1-10 mM W. While the enzyme from the wild-type strain contained the polypeptides of the conventional enzyme, metal analysis of component 1 demonstrated the existence of one atom each of molybdenum and tungsten. Furthermore, the ESR spectr...
متن کاملStudies on Nitrogen Fixation by Blue-green Algae I. Nitrogen Fixation by Anabaena Cylindrica Lemm
RECENT work, particularly that of De (1939), has shown that some blue-green algae are capable of utilizing the free nitrogen of the atmosphere in the synthesis of cell material. Much further work will be necessary, however, before the importance of nitrogen fixation by these organisms in nature can be estimated, our knowledge both of the distribution of the property within the group of the Myxo...
متن کاملFixation of isotopic nitrogen by excised nodules.
After 60 years of research in symbiotic nitrogen fixation, the agent of fixation has not been established. Apparently only two biological species, leguminous plants and Rhisobium, are essential (l), but attempts to separate the components have been unsuccessful. Unequivocal fixation by the intact nodule excised from a plant actively fixing nitrogen has not been demonstrated. Ordinarily, cells o...
متن کاملPhysiology of nitrogen fixation by Aerobacter aerogenes.
Skinner (1928) tested 23 strains of Bacteriumn aerogenes (Aerobacter aerogenes) and reported that two, and possibly a third, assimilated gaseous nitrogen when cultured in liquid medium, a claim confirmed 27 years later by Hamilton and Wilson (1955) using the N" isotopic method. Their experiments indicated that A. aerogenes incorporated significant amounts of tracer and that anaerobically, in a ...
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ژورنال
عنوان ژورنال: Nature
سال: 1923
ISSN: 0028-0836,1476-4687
DOI: 10.1038/111187b0