Dinitrogen Fixation by Cultures of Frankia sp CpIl Demonstrated by 15N2 Incorporation | Zendy

John G. Torrey | Zendy; John D. Tjepkema | Zendy; Graham L. Turner | Zendy; F. J. Bergersen | Zendy; Alan H. Gibson | Zendy

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Dinitrogen Fixation by Cultures of Frankia sp CpIl Demonstrated by ¹⁵N₂ Incorporation

Author(s) -

John G. Torrey,

John D. Tjepkema,

Graham L. Turner,

F. J. Bergersen,

Alan H. Gibson

Publication year - 1981

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.68.4.983

Subject(s) - frankia , nitrogen fixation , biology , fixation (population genetics) , chemistry , microbiology and biotechnology , botany , bacteria , gene , genetics , root nodule

The filamentous bacterium Frankia of the Actinomycetales, isolated from the nitrogen-fixing root nodules of certain woody plants, has shown nitrogenase activity in culture, using the acetylene reduction method. In the present work, nitrogenase activity in pure cultures of Frankia sp. CpIl is confirmed using mass spectrometric measurements of (15)N(2) incorporation. After addition of carrier NH(4) (+) to digested cultures, those exposed to (15)N(2) (25 atom%) had a (15)N content of 3.16 atom% compared to 0.354 atom% (15)N in the controls.

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