Certain plant-associated prokaryotes such as Corynebacteriurn
fascians and Agrobacterium tumefaciens are known to produce substantial
levels of cytokinins. In view of the fragmentary and
presumptive evidence available on the quantitative and qualitative
levels of cytokinins produced by A. tumefaciens, it was decided to
conduct a study of the cytokinins produced...
The ability of N,N'-diphenylurea (DPU) to substitute for cytokininactive
adenine derivatives in promoting callus growth of Phaseolus lunatus
and Nicotiana tabacum has been examined. In general, DPU stimulated
callus growth of P. lunatus at high concentrations and the growth of
most callus tissues was irregular, while the response of tobacco...