Abstract.
Internodal growth of deepwater rice (Oryza sativa L.) can achieve rates of up to 10 mm h−1. In submergence-induced plants, gibberellic acid activates the cell division cycle first at the G1 → S phase transition with a subsequent increase in mitotic activity. The proteins cycA1;1 and cdc2Os-3 are the regulatory and catalytic subunits, respectively, of cyclin-dependent protein kinases (CDKs) which are central to cell cycle regulation. Both genes are regulated by gibberellic acid in a coordinate manner with transcripts accumulating in the G2 phase prior to the B2-type mitotic cyclins described previously (M. Sauter et al. 1995, Plant J 7: 623–632), suggesting a distinct role in regulating G2/M phase progression. Since cdc2Os-3 belongs to a group of CDKs that have no counterparts in animals, it may function in a plant-specific gibberellin-regulated cell division process.
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Received: 1 September 1999 / Accepted: 21 January 2000
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Fabian, T., Lorbiecke, R., Umeda, M. et al. The cell cycle genes cycA1;1 and cdc2Os-3 are coordinately regulated by gibberellin in planta. Planta 211, 376–383 (2000). https://doi.org/10.1007/s004250000295
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DOI: https://doi.org/10.1007/s004250000295