Frankia Vesicles Provide Inducible and Absolute Oxygen Protection for Nitrogenase | Zendy

Richard Parsons | Zendy; Warwick B. Silvester | Zendy; S.L. Harris | Zendy; W. T. M. Gruijters | Zendy; S. Bullivant | Zendy

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Frankia Vesicles Provide Inducible and Absolute Oxygen Protection for Nitrogenase

Author(s) -

Richard Parsons,

Warwick B. Silvester,

S.L. Harris,

W. T. M. Gruijters,

S. Bullivant

Publication year - 1987

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.83.4.728

Subject(s) - frankia , nitrogenase , vesicle , oxygen , transmission electron microscopy , nitrogen fixation , biology , microbiology and biotechnology , biophysics , chemistry , nitrogen , biochemistry , root nodule , materials science , nanotechnology , membrane , organic chemistry

When Frankia HFPCcI3 was grown in culture at oxygen O(2) levels ranging from 2 to 70 kilopascals O(2), under nitrogen fixing conditions, nitrogenase activity adapted to ambient pO(2) and showed a marked optimum close to growth pO(2). Vesicles were thin walled at low pO(2) and very thick walled at high pO(2). Freeze fracture transmission electron microscopy confirmed that Frankia produces vesicles with outer walls thickened by multiple lipid-like monolayers, in proportion to ambient pO(2).

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