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- Title
Axillary meristem development in the branchless Zu-0 ecotype of Arabidopsis thaliana.
- Authors
Kalinina, Anna; Mihajlović, Nela; Grbić, Vojislava
- Abstract
Axillary meristems form in the leaf axils during post-embryonic development. In order to initiate the genetic dissection of axillary meristem development, we have characterized the late-flowering branchless ecotype of Arabidopsis thaliana (L.) Heynh., Zu-0. The first-formed rosette leaves of Zu-0 plants all initiate axillary meristems, but later-formed leaves of the rosette remain branchless. Alteration in the meristem development is axillary meristem-specific because the shoot apical and floral meristems develop normally. Scanning electron microscopy, histology and RNA in situ analysis with SHOOTMERISTEMLESS (STM), a marker for meristematic tissues, show that a mound of cells form and STM mRNA accumulates in barren leaf axils, indicating that axillary meristems initiate but arrest in their development prior to organizing a meristem proper. Expression and retention of the STM RNA in barren leaf axils further suggests that STM expression is not sufficient for the establishment of the axillary meristem proper.
- Subjects
ARABIDOPSIS thaliana; EMBRYONIC stem cells; HISTOLOGY; SCANNING electron microscopes; MESSENGER RNA; GENE expression
- Publication
Planta: An International Journal of Plant Biology, 2002, Vol 215, Issue 5, p699
- ISSN
0032-0935
- Publication type
Article
- DOI
10.1007/s00425-002-0820-7