Analysis of Stomatal Patterning in Selected Mutants of MAPK Pathways
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Abrar Felemban Thesis
Type
ThesisAuthors
Felemban, Abrar
Advisors
Hirt, Heribert
Committee members
Voolstra, Christian R.
Fischle, Wolfgang

Program
BioscienceKAUST Department
Biological and Environmental Science and Engineering (BESE) DivisionDate
2016-05Permanent link to this record
http://hdl.handle.net/10754/608677
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Stomata are cellular valves in plants that play an essential role in the regulation of gas exchange and are distributed in the epidermis of aerial organs. In Arabidopsis thaliana, stomatal production and development are coordinated by the mitogen-activated protein kinase (MAPK) signalling pathway, which modulates a variety of other processes, including cell proliferation, regulation of cytokinesis, programed cell death, and response to abiotic and biotic stress. The environment also plays a role in stomatal development, by influencing the frequency at which stomata develop in leaves. This thesis presents an analysis of stomatal development in Arabidopsis mutants in two MAPK pathways: MEKK1-MKK1/MKK2-MPK4, and MAP3K17/18-MKK3. Obtained results demonstrate the effect of stress conditions on stomatal development and specify the involvement of analysed MAPK in stomatal patterning. First, both analysed pathways modulate stomatal patterning in Arabidopsis cotyledons. Second, plant growth-promoting bacteria tested enhance stomatal density and affect guard cell morphology. Third, the sucrose or mannitol treatment increases defects in stomatal patterning. Finally, salt stress or high temperature can suppress stomatal defects in mutants of the MEKK1-MKK1/MKK2-MPK4 pathway.Citation
Felemban, A. (2016). Analysis of Stomatal Patterning in Selected Mutants of MAPK Pathways. KAUST Research Repository. https://doi.org/10.25781/KAUST-Q9D97ae974a485f413a2113503eed53cd6c53
10.25781/KAUST-Q9D97