Onion root tips were grown in water, kinetin or 6-benzyladenine and levels of RNA in the chromatin region of nuclei were analyzed using visible light microscopy with basic-dye staining, and ultraviolet microscopy of unstained material. No evidence was found for a significant increase in nuclear RNA in response to cytokinin treatment.

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Persistent URL dx.doi.org/10.1007/BF00389314
Journal Planta
Chaly, N, & Setterfield, G. (George). (1972). Cytokinins and nuclear RNA levels in onion root tips. Planta, 108(4), 363–368. doi:10.1007/BF00389314