Polyamines in Rhizobium, Bradyrhizobium, Azorhizobium and Argobacterium

Koei Hamana, Kiwamu Minamisawa, Shigeru Matsuzaki

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Eighteen strains of Rhizobium including four species, R. leguminosarum, R. meliloti, R. loti and R. fredii, nine strains of Bradyrhizobium japonicum and three strains of Azorhizobium caulinodans contained putrescine and honospermidine as major polyamines. All these nodulating N2-fixing rhizobia lack spermidine. Spermidine and cadaverine were present only in a limited number of R. meliloti and B. japonicum. Polymanine-synthetic activity was not affected by the differences in ability to produce phytoxine (rhizobitoxine and dihydrorhizobitoxine) H2-uptake-hydrogenation in the organisms. Putrescine and homospermidine were major polyamined in a strain of Agrobacterium rhizogenes. All the eight strains of Agrobacterium tumefaciens as well as A. rubi, A. radiobacter and two other strains of A. rhizogenes contained putrescine and spermidine as major polyamines and homospermidine and spermine (and thermospermine) as minor polyamines.

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalFEMS Microbiology Letters
Issue number1-2
Publication statusPublished - 1990 Sept 1
Externally publishedYes


  • Agrobacterium
  • Azorhizobium
  • Bradyrhizobium
  • Homospermidine
  • Polyamine
  • Rhizobium

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology
  • Genetics


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