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Plastid ultrastructure. Wild-type and im seedlings were grown on Murashige and Skoog plates for 7 d under normal light conditions (A, B, C, and D) or in darkness (E and F). A, Chloroplast from a wild-type cotyledon (bar = 500 nm). B, Chloroplast from an im cotyledon (bar = 500 nm). C, Amyloplast from a wild-type root (bar = 200 nm). D, Amyloplast from an im root (bar = 200 nm). E, Etioplast from a wild-type cotyledon (bar = 200 nm). F, Etioplast from an im cotyledon (bar = 200 nm).
