title: Growth regulators, Rhizobium and nodulation in peas : The cytokinin content of a wild-type and a Ti-plasmid-containing strain of R. leguminosarum.
abstract: The cytokinin content of roots and nodules of pea and the culture supernatants from two strains of Rhizobium leguminosarum has been examined. Roots, nodules and wild-type Rhizobium culture medium contained very little cytokinin as indicated by bioassay. Chemical ionisation gas chromatography-mass spectrometric analysis of the isopentenyladenine content of the culture medium from the Rhizobium strains confirmed that the content of the wild-type was low (approx. 1 ng dm(-3)) but that it was increased by the introduction of the Agrobacterium Ti plasmid into the Rhizobium strain.
authors.affiliation: John Innes Institute, Colney Lane, NR4 7UH, Norwich, UK.
authors.forename: T L
authors.initials: TL
authors.lastname: Wang
authors.forename: E A
authors.initials: EA
authors.lastname: Wood
authors.forename: N J
authors.initials: NJ
authors.lastname: Brewin