The Power of Movement in Plants
Whippo, Craig W. , Hangarter, Roger .
Chloroplast Movements in Plants.
Chloroplast relocation in response to changing light environments is common in plants. Under low light conditions chloroplast aggregate along the cell walls perpendicular to the light, and under bight light chloroplast move adjacent to the cell wall perpendicular to the incoming light. Several Arabidopsis mutants with altered chloroplast movement have been identified. Three mutants display impaired, but not abolished, chloroplast movements under both dim and bright light conditions: plastid movement impaired 1, (pmi1), pmi3, and pmi13. PMI1 is a unique plant specific protein, whereas the PMI3 and PMI13 proteins contain conserved domains also found in animal proteins that are known to associate with the plasma membrane or cytoskeleton components. The intercellular localization of these PMI mutants will be discussed as well as how these proteins affect the cytoskeleton during chloroplast movements.
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1 - Indiana University, Biology, 915 E Third Street, Myers Hall 330, Bloomington, IN, 47405, USA
2 - Indiana University, Department of Biology, 1001 East Third Street, Bloomington, Indiana, 47405-3700, USA
Presentation Type: Symposium or Colloquium Presentation
Location: Ballroom 2/Cliff Lodge - Level B
Date: Monday, July 27th, 2009
Time: 8:15 AM