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1: Planta. 1999 Jun;208(4):453-62.Click here to read Links

A new D-type cyclin of Arabidopsis thaliana expressed during lateral root primordia formation.

De Veylder L, de Almeida Engler J, Burssens S, Manevski A, Lescure B, Van Montagu M, Engler G, Inzé D.

Department of Plant Genetics, Flanders Interuniversity Institute for Biotechnology (VIB), Universiteit Gent, Belgium.

D-type cyclins are believed to regulate the onset of cell division upon mitogenic signaling. Here, the isolation is reported of a new D-type cyclin gene (CYCD4;1) of Arabidopsis thaliana (L.) Heynh. during a two-hybrid screen using the cyclin-dependent kinase CDC2aAt as bait. Transcription of CYCD4;1 can be induced by sucrose. The co-regulated expression of CYCD4;1 and CDC2aAt in starved suspension cultures upon mitogenic stimulation indicates that the formation of a complex between these two partners is important for the resumption of cell division activity. By in-situ hybridizations CYCD4;1 was shown to be expressed during vascular tissue development, embryogenesis, and formation of lateral root primordia. Expression during the latter process suggests that the induced expression of D-type cyclins by mitogenic stimuli might be one of the rate-limiting events for the initiation of lateral roots.

PMID: 10420643 [PubMed - indexed for MEDLINE]