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- Title
MIR166/ 165 genes exhibit dynamic expression patterns in regulating shoot apical meristem and floral development in Arabidopsis.
- Authors
Jae-Hoon Jung; Chung-Mo Park
- Abstract
The miR166/165 group and its target genes regulate diverse aspects of plant development, including apical and lateral meristem formation, leaf polarity, and vascular development. We demonstrate here that MIR166/ 165 genes are dynamically controlled in regulating shoot apical meristem (SAM) and floral development in parallel to the WUSCHEL ( WUS)- CLAVATA ( CLV) pathway. Although miR166 and miR165 cleave same target mRNAs, individual MIR166/ 165 genes exhibit distinct expression domains in different plant tissues. The MIR166/165 expression is also temporarily regulated. Consistent with the dynamic expression patterns, an array of alterations in SAM activities and floral architectures was observed in the miR166/165-overproducing plants. In addition, when a MIR166a-overexpressing mutant was genetically crossed with mutants defective in the WUS- CLV pathway, the resultant crosses exhibited additive phenotypic effects, suggesting that the miR166/165-mediated signal exerts its role via a distinct signaling pathway.
- Subjects
ARABIDOPSIS; SHOOT apical meristems; PLANT development; FLOWERS; MERISTEMS; PLANT cells &; tissues; MESSENGER RNA; GENE expression; CELL polarity
- Publication
Planta: An International Journal of Plant Biology, 2007, Vol 225, Issue 6, p1327
- ISSN
0032-0935
- Publication type
Article
- DOI
10.1007/s00425-006-0439-1