Abstract
The hydrogen uptake (Hup) system of Bradyrhizobium diazoefficiens recycles the H2 released by nitrogenase in soybean nodule symbiosis, and is responsible for H2-dependent chemolithoautotrophic growth. The strain USDA110 has two hup gene clusters located outside (locus I) and inside (locus II) a symbiosis island. Bacterial growth under H2-dependent chemolithoautotrophic conditions was markedly weaker and H2 production by soybean nodules was markedly stronger for the mutant of hup locus I (ΔhupS1L1) than for the mutant of hup locus II (ΔhupS2L2). These results indicate that locus I is primarily responsible for Hup activity.
Original language | English |
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Pages (from-to) | 76-78 |
Number of pages | 3 |
Journal | Microbes and environments |
Volume | 31 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2016 Mar 26 |
Keywords
- Bradyrhizobium diazoefficiens
- Chemolithoautotrophic growth
- Hydrogenase
- Symbiosis
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Soil Science
- Plant Science