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. 2008 Jun;59(9):2529–2543. doi: 10.1093/jxb/ern119

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© 2008 The Author(s).

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details)

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Fig. 3. — TEM images of control (A, C, E, G) and IAA-treated (B, D, F, H) pollen tubes after 2 h of culture of Torenia fournieri. (A) The clear zone of a control tube, showing the vesicle-rich zone. (B) The clear zone of a treated tube, showing a dramatic increase in secretory vesicles (SVs) and appearance of organelles, e.g. mitochondria (M) in this zone. (C) The organelle zone of a control tube, showing some organelles, such as mitochondria, trophoplasts (T), and lipid bodies (L). (D) The organelle zone of a treated tube, showing more SVs and mitochondria. (E) The nuclear zone of a control tube, showing the spindly tube nucleus (N). (F) The nuclear zone of a treated tube, showing the spindly tube nucleus and abundant vacuoles (V). (G) Subapical region of a control tube filled with long strip-shaped and small round-shaped vacuoles. (H) Subapical region of a treated tube occupied by big vacuoles. Bars = 1.6 μm (A, G), 2 μm (B, F), 1 μm (C, D), 1.8 μm (E), 1.3 μm (H).