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. 2017 Jul 25;7:6439. doi: 10.1038/s41598-017-06909-2

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Transmission electron microscopic analysis of pollen grains in the phyA and phyB single and double mutants, and wild-type (WT) rice at stage 12. Cross sections of pollen grains from WT (A and B), the phyA mutant (C and D), the phyB mutant (E and F), the phyA phyB mutant (G–J). EX, exine layer; IN, intine layer; SG, starch granule; L, lipid body. Bars = 5 µm in (A,C,E,G and I) 1 µm in (B,D,F,H and J).