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. 2020 Sep 3;21(17):6428. doi: 10.3390/ijms21176428

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Transmission electron micrographs of pollen grains from bcmf30a bcmf30c mutants. Ultrastructure of pollen at different developmental stages from the control plants (A–C) and bcmf30a bcmf30c (D–G). (A,D) Late uninucleate stage; (B,E) bicellular pollen stage; (C,F,G) tricellular pollen stage. BCP, bicellular pollen; cBCP, collapsed BCP; GC, generative cell; Msp, microspore; cMsp, collapsed Msp; N, nucleus; TCP, tricellular pollen; cTCP, collapsed TCP; dTCP, degenerated TCP; V, Vacule; VN, vegetative nucleus. Bars = 5 μm.