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 language | English (US) |
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Pages (from-to) | 420-422 |
Number of pages | 3 |
Journal | Plant Signaling and Behavior |
Volume | 3 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2008 |
Keywords
- Endoreduplication
- Plant cell cycle
- Plant development
- glabra1