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. 2014 Jul 8;5:327. doi: 10.3389/fpls.2014.00327

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Copyright © 2014 Hawkins and Liu.

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) or licensor 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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Gynoecium phenotypes of mutants defective in auxin biosynthesis, transport, or signaling. (A) Wild-type gynoecium at stage 12 with the parts labeled as stigma (sg), style (sy), replum (rep), valves (va), and gynophore (gyn). (B) ett-3 gynoecium at stage 12, showing an elongated gynophore, a diminished valve pushed toward the apex, and expanded stigma, style, and transmitting track (tt) tissue. (C) Gynoecium of a yuc1-1 yuc4-1 double mutant, showing the complete absence of ovary valve and an enlarged apical stigma. (D) A weak pin mutant showing a gynoecium without any ovary valve tissue. (E) A pid gynoecium with one small ovary valve (arrow). (F,G) NPA-treated wild type Arabidopsis gynoecium. The apical and basal boundaries of the ovary are marked by a pair of arrows. The various tissues are indicated with letters: ovary (o), replum (r), valve (v), style (st), and stigma (sg). Images are reproduced from Heisler et al. (2001; A,B), Cheng et al. (2006; C); Roeder and Yanofsky (2006; D,E), and Nemhauser et al. (2000; F,G) with permissions from Copyright Clearance Center or Creative Commons Attribution-Non-Commercial 4.0 International License. Scale bars: 200 μm (A–C); 250 μm (D,E); 165 μm (F) and 140 μm (G).