Stomata are specialized plant structures required for gaseous exchange with the outer environment. During stomata formation, the cytoskeleton plays an important role in controlling the division of the individual cells leading to the generation of the stomata complex. Two mutants that affect microfilament and microtubule organization in subsidiary mother cells include brk1 and dcd1. While only 20% of the subsidiary cells in the brk1 and dcd1 single mutants are abnormally shaped, it was reported that there is a synergistic effect between the brk1 and dcd1 mutations in the brk1; dcd1 double mutant since 100% of the subsidiary cells are abnormal. The focus of this research is to try to understand this synergistic effect by investigating the actin cytoskeleton and nuclear position in the single and double mutants. The reported results include the observation that the size of actin patch was largest in the wild-type subsidiary mother cells (SMCs) and smallest in dcd1 and brk1; dcd1 SMCs and that brk1 and brk1; dcd1 double mutants had fewer actin patches than wild-type and dcd1 SMCs. Additionally, we observed that some SMCs that did not have actin patches still underwent nuclear migration suggesting that nuclear migration may not be solely dependent on actin patch formation. Finally, during SMC cytokinesis, a large percentage of double mutant (brk1; dcd1) cells showed an off-track development of the phragmoplast as compared to the single mutants and the wild-type plant explaining the large number of abnormally shaped subsidiary cells in the double mutants.
| Identifer | oai:union.ndltd.org:unt.edu/info:ark/67531/metadc699951 |
| Date | 08 1900 |
| Creators | Alhassan, Hassan Hamdan |
| Contributors | Wright, Amanda J., Benjamin, Robert C., Brumbley, Stevens |
| Publisher | University of North Texas |
| Source Sets | University of North Texas |
| Language | English |
| Detected Language | English |
| Type | Thesis or Dissertation |
| Format | vi, 39 pages : color illustrations, Text |
| Rights | Public, Alhassan, Hassan Hamdan, Copyright, Copyright is held by the author, unless otherwise noted. All rights Reserved. |
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