Classes of Anabaena variabilis mutants with oxygen-sensitive nitrogenase activity | Zendy

J F Haury | Zendy; C. Peter Wölk | Zendy

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Classes of Anabaena variabilis mutants with oxygen-sensitive nitrogenase activity

Author(s) -

J F Haury,

C. Peter Wölk

Publication year - 1978

Publication title -

journal of bacteriology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.652

H-Index - 246

eISSN - 1067-8832

pISSN - 0021-9193

DOI - 10.1128/jb.136.2.688-692.1978

Subject(s) - nitrogenase , anabaena variabilis , heterocyst , biology , mutant , glycolipid , biochemistry , nitrogen fixation , oxygen , anabaena , cyanobacteria , microbiology and biotechnology , bacteria , chemistry , genetics , organic chemistry , gene

Mutants of Anabaena variabilis deficient in the envelope glycolipids of heterocysts have no or very low nitrogenase activity when assayed aerobically. Revertants capable of aerobic growth on N2 have increased quantities of these glycolipids. Among mutants which require fixed nitrogen for growth in air and which have a normal complement of glycolipids, one expresses high nitrogenase activity at low oxygen tension. Three others show high nitrogenase activity only in the presence of dithionite and are therefore impaired in electron transfer.

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