Nitrogen-fixing growth by nonheterocystous cyanobacterium Plectonema boryanum

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Many oxygen-evolving nonheterocystous cyanobacteria can synthesise nitrogenase1,2, but only a few are able to protect the enzyme from inhibition and denaturation by oxygen3-5. It is difficult to reconcile concomitant oxygenic photosynthesis and the obligately anaerobic process of nitrogen fixation in the remaining strains. One possibility is a temporal separation of the processes: Plectonema boryanum (U. Tex strain 594) has been shown6 to fix nitrogen and then grow oxygenically to the limits of the fixed nitrogen when incubated without combined nitrogen under N2/CO2. Growth was not extensive. Here conditions are described in which the same strain of P. boryanum will simultaneously fix nitrogen and grow extensively, fully pigmented, apparently with sufficient metabolic energy to drive nitrogen fixation.

Original languageEnglish
Pages (from-to)563-564
Number of pages2
Issue number5756
Publication statusPublished - 1980
Externally publishedYes

ASJC Scopus subject areas

  • Multidisciplinary


Dive into the research topics of 'Nitrogen-fixing growth by nonheterocystous cyanobacterium Plectonema boryanum'. Together they form a unique fingerprint.

Cite this