Answers are grounded in this paper and cite their sources.
Azotobacter vinelandii OP was grown to stationary phase in defined medium. The cell-free culture medium was analyzed for cytokinin content by XAD-2 and Sephadex LH-20 chromatography, thin-layer chromatography, tobacco callus bioassay, and enzyme immunoassay. Three cytokinin-active fractions were detected and tentatively identified as trans-zeatin, isopentenyladenosine, and isopentenyladenine. The total cytokinin activity was equivalent to 0.75 mug of kinetin per liter.
No takes yet. Share an insight, caveat, or question.
Taller et al. (1989) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: