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. 2019 Jun 19;10:715. doi: 10.3389/fphys.2019.00715

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Copyright © 2019 Salvia, Grimaldi, Girardello, Scieuzo, Scala, Bufo, Vogel and Falabella.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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SEM micrographs of teratocytes. Teratocytes isolated from pea aphids 5 days after parasitization by A. ervi have a surface covered with numerous microvilli (A) and are characterized by the presence of indentations or dimple-like structures (B,C). Spherical vesicles and structures similar to exosomes protrude from the plasma membrane [arrowheads in (D,D′)]. Numerous exosome-like structures [arrowheads in (E,F)] are interspersed among the microvilli. Spherical vesicles filled with smaller vesicles with circular profiles are visible in the cytoplasm [arrowheads in (G,G′)]. Large stellate nuclei (H) and vacuoles (H,I) are visible in the sectioned teratocytes. (mv) microvilli, (n) nucleus, (v) vacuoles. Bars in (A,C,D,G): 20 μm; bar in (B): 50 μm; bars in (D′,G′): 2.5 μm; bars in (E,F): 1 μm; bar in (H): 100 μm; bar in (I): 10 μm.