Atvps34, the Arabidopsis Phosphotidylinositol 3-Kinase, Its Functions in ABA and Auxin Signaling Pathways and the Molecular Basis for Salinity Stress Tolerance in Extremophile Thellungiella Halophila
Gong, Qingqiu
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https://hdl.handle.net/2142/87052
Description
Title
Atvps34, the Arabidopsis Phosphotidylinositol 3-Kinase, Its Functions in ABA and Auxin Signaling Pathways and the Molecular Basis for Salinity Stress Tolerance in Extremophile Thellungiella Halophila
Author(s)
Gong, Qingqiu
Issue Date
2006
Doctoral Committee Chair(s)
Hans J. Bohnert
Department of Study
Plant Biology
Discipline
Plant Biology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Molecular
Language
eng
Abstract
Thellungiella halophila, a close relative of Arabidopsis thaliana, is a halophyte that can survive in sea water. Microarray transcript profiling and intensity analysis, quantitative RT-PCR, and metabolite profiles revealed shared and divergent responses to salt stress in the two species. Sixty percent of regulated genes distinguished Thellungiella from Arabidopsis. Analysis of the differences showed that Arabidopsis took a global defense strategy that required bulk protein synthesis, while Thellungiella induced genes functioning in protein folding, post-translational modification, and protein redistribution. The microarray results were supported by transcript intensity analyses and metabolite profiling results, pointing towards a stress-anticipatory preparedness in Thellungiella.
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