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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Itoh, J. I. Kitano, H. Matsuoka, M. Nagato, Y. |
| Description | Country affiliation: Japan Author Affiliation: Itoh JI ( Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan.) |
| Abstract | The mechanism regulating the pattern of leaf initiation was analyzed by using shoot organization (sho) mutants derived from three loci (SHO1, SHO2, and SHO3). In the early vegetative phase, sho mutants show an increased rate of leaf production with random phyllotaxy. The resulting leaves are malformed, threadlike, or short and narrow. Their shoot apical meristems are relatively low and wide, that is, flat shaped, although their shape and size are highly variable among plants of the same genotype. Statistical analysis reveals that the shape of the shoot meristem rather than its size is closely correlated with the variations of plastochron and phyllotaxy. Rapid and random leaf production in sho mutants is correlated with the frequent and disorganized cell divisions in the shoot meristem and with a reduction of expression domain of a rice homeobox gene, OSH1. These changes in the organization and behavior of the shoot apical meristems suggest that sho mutants have fewer indeterminate cells and more determinate cells than wild type, with many cells acting as leaf founder cells. Thus, the SHO genes have an important role in maintaining the proper organization of the shoot apical meristem, which is essential for the normal initiation pattern of leaf primordia. |
| File Format | HTM / HTML |
| ISSN | 10404651 |
| e-ISSN | 1531298X |
| Journal | THE PLANT CELL ONLINE |
| Issue Number | 11 |
| Volume Number | 12 |
| Language | English |
| Publisher | American Society of Plant Biologists |
| Publisher Date | 2000-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Botany Oryza Sativa Anatomy & Histology Plant Proteins Genetics Cell Division Gene Expression Regulation, Plant Genes, Homeobox In Situ Hybridization Microscopy, Electron, Scanning Ultrastructure Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Plant Science |
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