A role for poly-β-hydroxybutyrate in bacteroids of soybean root nodules
| Autor: | F.J. Bergersen, Mark B. Peoples, G. L. Turner |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
High rate
Root nodule General Immunology and Microbiology technology industry and agriculture food and beverages macromolecular substances General Medicine Biology General Biochemistry Genetics and Molecular Biology Symbiosis Darkness Botany Nitrogen fixation lipids (amino acids peptides and proteins) Food science General Agricultural and Biological Sciences Energy source General Environmental Science |
| Zdroj: | Proceedings of the Royal Society of London. Series B: Biological Sciences. 245:59-64 |
| ISSN: | 1471-2954 0962-8452 |
| DOI: | 10.1098/rspb.1991.0088 |
| Popis: | The concentrations of poly-$\beta $-hydroxybutyrate (PHB) and of total $\beta $-hydroxybutyrate (total HB = PHB + non-polymeric forms) were determined in bacteroids prepared from root nodules of field- and glasshouse-grown soybeans. Results showed that PHB was utilized during darkness, when bacteroids were deprived of host-stored energy sources. Deprivation was induced by stem-girdling or by competition from rapidly growing seeds. It is proposed that utilization of PHB sustains the O$\_{2}$ demand of the bacteroids during darkness, thus contributing to preservation of nodule activity and the continuation of N$\_{2}$ fixation at high rates until the last stages of seed development. |
| Databáze: | OpenAIRE |
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