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. 2020 Dec 29;11:610052. doi: 10.3389/fpls.2020.610052

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Copyright © 2020 Feldeverd, Porter, Yuen, Iwai, Carrillo, Smith, Barela, Wong, Wang, Kang, Matsumoto and Christopher.

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) and the copyright owner(s) 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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Histochemical analysis of two independent PDI9_promoter:β-glucuronidase (GUS) and PDI10_promoter:GUS expression constructs in developing and mature flowers. Panels (A–F) indicate a floral developmental series from 6-week-old plants expressing PDI9_promoter:GUS. (G) Depiction of a large inflorescence expressing PDI10_promoter:GUS. (H) Close-up view of PDI10_promoter:GUS expression in anthers and pollen. (I) Close up of a pollen grain in PDI9_promoter:GUS plants. Black arrows indicate pollen grains and white arrow the tapetum.