Abstract:
:Herbaspirillum seropedicae strains mutated in the nifX or orf1 genes showed 90% or 50% reduction in nitrogenase activity under low levels of iron or molybdenum respectively. Mutations in nifX or orf1 genes did not affect nif gene expression since a nifH::lacZ fusion was fully active in both mutants. nifX and the contiguous gene orf1 are essential for maximum nitrogen fixation under iron limitation and are probably involved in synthesis of nitrogenase iron or iron-molybdenum clusters.
journal_name
FEMS Microbiol Lettjournal_title
FEMS microbiology lettersauthors
Klassen G,de Oliveira Pedrosa F,de Souza EM,Yates MG,Rigo LUdoi
10.1016/S0378-1097(03)00453-1keywords:
subject
Has Abstractpub_date
2003-07-29 00:00:00pages
255-9issue
2eissn
0378-1097issn
1574-6968pii
S0378109703004531journal_volume
224pub_type
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