Advertisement

Planta

, Volume 211, Issue 3, pp 376–383 | Cite as

The cell cycle genes cycA1;1 and cdc2Os-3 are coordinately regulated by gibberellin in planta

  • Tanja Fabian
  • René Lorbiecke
  • Masaaki Umeda
  • Margret Sauter

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.

Key words: Cell division Cyclin Cyclin-dependent protein kinase Gibberellin Growth Oryza (cell cycle) 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Tanja Fabian
    • 1
  • René Lorbiecke
    • 1
  • Masaaki Umeda
    • 2
  • Margret Sauter
    • 1
  1. 1.Institut für Allgemeine Botanik, AMPII, Universität Hamburg, Ohnhorststrasse 18, 22609 Hamburg, GermanyDE
  2. 2.Institute of Molecular and Cellular Biosciences, University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-0032, JapanJP

Personalised recommendations