E2F and retinoblastoma related proteins may regulate GL1 expression in developing Arabidopsis trichomes

Jonathan P. Wenger, M. David Marks

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This is an addendum to our recent paper published in The Plant Journal (52:352-61). The major findings were: (1) trichomes on the leaves of gl3-sst sim double mutants developed as large multicellular clusters whereas wild type trichomes are composed of single cells; (2) ectopic CYCD3;1 expression in gl3-sst trichomes also resulted in trichome cluster formation; and (3) that GL1 expression is prolonged in the gl3-sst sim trichome clusters. This addendum shows that ectopic CYCD3;1 expression in gl3-sst also enhanced GL1 expression. An analysis of the GL1 promoter found two overlapping potential E2F binding sites in a region of the promoter known to be essential for GL1 function. This finding indicates that GL1 may be direcdy regulated by the activity of a CYCD3/CDKA complex that phosphorylates E2F-RB bound to the GL1 promoter.

Original languageEnglish (US)
Pages (from-to)420-422
Number of pages3
JournalPlant Signaling and Behavior
Volume3
Issue number6
DOIs
StatePublished - Jun 2008

Keywords

  • Endoreduplication
  • Plant cell cycle
  • Plant development
  • glabra1

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