News FocusNinth International Plant Molecular Biology Congress, 25–30 October 2009, St. Louis, Missouri

Chloroplast Shuffle

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Science  20 Nov 2009:
Vol. 326, Issue 5956, pp. 1058
DOI: 10.1126/science.326.5956.1058-a

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For more than a century, researchers have known that chloroplasts move. But it's taken 25 years to figure out how these photosynthesizing organelles make their way across a cell. Labeling and imaging experiments have revealed that they slide from one place to another, never turning, twisting, or rolling. They seem to rely on the polymerization of protein filaments to pull them along, researchers reported at the 9th International Plant Molecular Biology Congress, and they can move quickly—or slowly—depending on the circumstances.