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. 2015 Feb 19;6:94. doi: 10.3389/fpls.2015.00094

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Copyright © 2015 Parra-Vega, Corral-Martínez, Rivas-Sendra and Seguí-Simarro.

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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Stages of B. napus microspore embryogenesis. (A) Vacuolate microspores during in vivo development within the anther. (B) Just induced, embryogenic microspore showing two clearly differentiated domains, the embryo proper domain (ep) and the suspensor (sus). Other microspores (mic) are not sensitive to induction and become arrested or enter a pollen-like development. (C) Globular MDE. (D) transitional MDE. (E) Torpedo MDE. al, anther locule; t, tapetum; v, vacuole. Bars: (A,B): 10 μm, (C–E): 50 μm.