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Physiology of Nitrogen Fixation in Two New Strains of Anabaena

Authors
  • Chen, Pei-Chung
Type
Published Article
Journal
Zeitschrift für Naturforschung C
Publisher
Verlag der Zeitschrift für Naturforschung
Publication Date
Jun 01, 1985
Volume
40
Issue
5-6
Pages
406–408
Identifiers
DOI: 10.1515/znc-1985-5-620
Source
De Gruyter
Keywords
License
Green

Abstract

Two different cyanobacteria, Anabaena CH 1 and CH2, were isolated from Taiwan paddy soils. Both strains can grow well with daily dilution method. Anabaena CH1 shows a blue-green color and Anabaena CH2 a green brownish one. Nitrogenase activity decreased as cultures were transferred from light to dark. When a darkened culture was placed again into the light, nitrogenase activity recovered within two hours, but not in the presence of chloramphenicol. Energy supply for nitrogenase within both strains was different. Nitrogenase activity of Anabaena CH1 was light-dependent and oxygen in heterocyst was exhausted through oxyhydrogen reaction. Except photosynthesis, respiration may be used as energy source for nitrogenase in Anabaena CH2. Respiration was the major one to protect nitrogenase against oxygen.

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