Gravity plays an important role in the developmental architecture of plants. One easily studied example of this is gravitropism, which is directional growth of a plant organ in response to a change in the gravity vector. Gravitropism is essential for proper nutrient acquisition because it dictates the correct orientation of shoots and roots. One method of studying gravitropism is through the Gravity Persistent Signal (GPS), which describes a plant’s response to a gravity stimulus in the cold.
The gps5 mutant, displays a hypergravitropic response after the GPS treatment, which means that the plant bends faster and further than normal wild type plants. The goal of this work is to determine the causative mutation in gps5. To do this we analyzed mutations in Aldose 1-epimerase domain-containing protein, MADS-box family protein, SCP1-like small phosphatase 5, and Glycosyltransferase to determine if any share the same phenotypic response of gps5. For each, detailed examination of inflorescence stem, hypocotyl, and root gravitropism were performed. After analysis of the measurements of the GPS response of our four candidate genes and their respective wild types our results suggest that none of the insertion lines show a hyper gravitropic response.
|Advisor:||Luesse, Darron R.|
|Commitee:||Esselman, Elizabeth, Fowler, Thomas|
|School:||Southern Illinois University at Edwardsville|
|School Location:||United States -- Illinois|
|Source:||MAI 82/7(E), Masters Abstracts International|
|Subjects:||Low Temperature Physics, Climate Change, Genetics, Plant sciences|
|Keywords:||Gravity, Plant development, Gravitropism , Plant organ, Gravity vector|
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