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. 2011 Jul 15;22(14):2579–2587. doi: 10.1091/mbc.E11-04-0279

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© 2011 Sato et al. This article is distributed by The American Society for Cell Biology under license from the author(s). Two months after publication it is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License (http://creativecommons.org/licenses/by-nc-sa/3.0).

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FIGURE 5: — Electron microscope analysis of wild-type and snap-29(RNAi) worms. Electron micrographs of cross sections of the intestine of wild-type and snap-29(RNAi) animals are shown. (A, B) Control RNAi animals display a normal intestinal organelle distribution, electron-dense adherens junctions (arrowheads), and microvilli. The tubular network of the ER, vesicles, granules, and elongated mitochondria (A, inset) are also observed. Large granules filled with electron-dense materials are likely to be granules containing yolk components to be exocytosed (A, asterisks). A stack of cisternae similar to the Golgi apparatus is also found (B, large arrow). In the intestine of the control RNAi animals, 0.76 Golgi, 0.41 multivesicular structures, and 5.0 electron-dense structures were observed in 10 μm². (C, D) In snap-29(RNAi) animals, many electron-dense small vesicles containing yolk and multivesicular structures have accumulated. The typical branching tubular network of the ER is difficult to detect. The snap-29(RNAi) animals frequently exhibited shortened microvilli on the apical surface, whereas the adherens junctions still exist. It should be noted that many rounder mitochondria (B, inset) and autophagosome- and autolysosome-like structures (D, arrows) are observed in the snap-29(RNAi) animals. In the intestine of the snap-29(RNAi) animals, 15.3 multivesicular structures and 45.0 electron-dense structures were observed in 10 μm².