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Mineyuki Yokoyama, Kunihiko Naito, Hiroshi Suzuki, Benzyladenine-Enhanced Growth of Attached Young Bean Leaves. Studies with Inhibitors of Nucleic Acid and Protein Synthesis, Plant and Cell Physiology, Volume 24, Issue 4, June 1983, Pages 749–757, https://doi.org/10.1093/oxfordjournals.pcp.a076572
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Abstract
Benzyladenine (BA) stimulated division but not expansion of mesophyll cells and repressed chlorophyll accumulation in attached young bean leaves. Even in the presence of fluorodeoxyuridine (FUdR) or mitomycin C which causes complete suppression of BA-induced increase in DNA content, BA increased RNA and protein contents and fresh weight, but decreased chlorophyll accumulation. Moreover, BA n the presence of FUdR induced marked cell expansion. In the presence of a-amanitin (AM), BA did not produce any change in DNA content, fresh weight or cell size. All of the BA effects were observed even in the presence of fluorouracil (FU) plus thymidine (TdR).
AM and cycloheximide added 0–12 h effectively inhibited BA-stimulated cell division but showed no effect if added at 18 h. FU plus TdR added 0–18 h had almostno effect on the cell number at 24 h.
These results indicate that BA stimulates the mRNA synthesis necessary for induction of cell division, and that the synthesis of cytoplasmic rRNA is not always necessary for BA-stimulated cell division, and moreover, that BA stimulates expansion growth of cells in which DNA synthesis is suppressed.