منابع مشابه
Studies 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 کاملEffect of interactions among algae on nitrogen fixation by blue-green algae (cyanobacteria) in flooded soils.
Nitrogen fixation (C(2)H(2) reduction) by algae in flooded soil was limited by interactions within the algal community. Nitrogen fixation by either indigenous algae or Tolypothrix tenuis was reduced severalfold by a dense suspension of the green alga Nephrocytium sp. Similarly, interactions between the nitrogen-fixing alga (cyanobacterium) Aulosira 68 and natural densities of indigenous algae l...
متن کاملNitrogen fixation and the heterocyst in blue-green algae.
of the relatively small number of substrates that can feed into the oxidative pentose phosphate cycle, is the most probable explanation for the widespread occurrence of obligate photoautotrophy among cyanobacteria. However, certain cyanobacteria that are facultative photoheterotrophs, able to grow'in the light in the presence of 3-(3,4dichloropheny1)-1 ,I-dimethylurea at the expense of glucose,...
متن کاملNitrogen 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 کاملNitrogenase activity and estimates of nitrogen fixation by freshwater benthic blue-green algae
The sandy substrate of Lake Taharoa (west coast, North Island, New Zealand 35°50'S, 173°41'E) is covered by communities of filamentous algae that extend from the exposed beach down to 21 m depth. The algae bind the sand to form crusts and mats which may break off as discrete plates. The dominant species are the blue-greens Microcoleus, Nostoc, Phormidium, Lyngbya, Oscillatoria, Scytonema, Stigo...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1908
ISSN: 0006-8071
DOI: 10.1086/329520